Teitl:    Data for PhD Thesis - "Imaging Stray Magnetic Fields Using 3D Scanning Techniques"

Dyfyniad
Gibbs RM (2020). Data for PhD Thesis - "Imaging Stray Magnetic Fields Using 3D Scanning Techniques". Cardiff University. https://doi.org/10.17035/d.2019.0079831572

Manylion y Set Ddata

Cyhoeddwr: Cardiff University

Dyddiad (y flwyddyn) pryd y daeth y data ar gael i'r cyhoedd: 2020

Dyddiad dechrau creu'r data: 01.01.2016

Dyddiad gorffen creu'r data: 31.12.2019

Fformat y data: .pdf, .7z, .odp, .ppt, .png, .csv, .zip, .mov, .vi

Meddalwedd ofynnol: The Data from each Chapter are compressed in a 7zip archive (.7z). The 7zip unarchiver is available at https://www.7-zip.org/.

Nifer y ffeiliau yn y set ddata: 38

DOI : 10.17035/d.2019.0079831572

DOI URL: http://doi.org/10.17035/d.2019.0079831572

Related URL: http://orca.cf.ac.uk/id/eprint/133528

Disgrifiad

A new versatile magnetic field scanning system has been developed; based on a Micromagnetics® STJ-020 tunnelling magneto-resistance (TMR) sensor and a 3-axis positioning arm, with a 3D-printed sensor enclosure, precision goniometer and integrated microscopic sight. Calibration of the hardware, quantifying the slack/backlash of the three axes, and the capabilities of the system and its sensors are recounted. The system is capable of; scanning precisely and repeatably at 1 μm/step with a 4 x 2 μm2 sensing area; scanning smooth continuously dynamic magnetic field changes at a sampling frequency up to 1 MHz; producing scans of three-dimensional volumes; and resolving the "eld components along multiple axes. The Scanner Control so7ware (available as open access†) has been developed to be modular, powerful and adaptable, permi9ng large datasets from multiple sensors to be analysed. Studies are made of the domain structure in 3% Grain-Oriented Electrical Steel, Amorphous Alloy materials, Cubexdoubly oriented Si-Fe Alloy and manufactured Planar coils, both statically and when reacting dynamically to externally applied alternating fields. Interpretation of the resulting field maps and comparison of the advantages and disadvantages of the Scanner system over other domain observation methods is given. The ability to scan a three-dimensional volume above the surface of the sample and to derive the Hz and Hx components from only a single axis sensor is developed and demonstrated, both statically and dynamically. The principles are tested against the known geometries of constructed planar coils, the expected fields from which are determined using Finite Element Modelling.The novel developments of the project, and the advantages of the developed Scanner System, culminate in, and are ultimately demonstrated by, the "nal dynamic three-dimensional, component-resolved stray-"eld scan of a volume above the surface of an unprepared sample of coated 3% grain-oriented electrical steel under alternating applied magnetic field.

The LabView code, 3D printing files and data underpinning each of the figures, tables and analysis in the completed PhD "Imaging Stray Magnetic Fields Using 3D Scanning Techniques" are catalogued here. The Data can be found in this Cardiff Portal Arxive at http://doi.org/10.17035/d.2019.0079831572 and through the included DVD-ROM. The Data are organised by chapter and the data from each Chapter are compressed in 7zip archive files (.7z). The 7zip unarchiver is available at https://www.7-zip.org/. This catalogue details the structure and description of these files. All files of saved scans are readable by version 3 of the Scanner Control software (SC3), files of scans using version 1 and version 2 (SC1 and SC2) have been updated. The arxive includes the final PhD _THESIS_.pdf and APPENDIX.pdf including Animated "Figures Presentations" and the "Instructional Video". A detailed "Catalogue of Data.pdf" file provides full collated description of these files.

Catalogue Structure

Page

_THESIS_.pdf

3

\Figures Presentations\

4

APPENDIX.pdf

6

Catalogue of Data.pdf

7

\Data Arxive\Chapter 4.7z

8

\Data Arxive\Chapter 5.7z

11

\Data Arxive\Chapter 6.7z

13

\Data Arxive\Chapter 7.7z

20

\Data Arxive\Chapter 8.7z

27

\Data Arxive\Publications.7z

34

\Instructional Video\

36

List of Filetypes

.7z 7zip archive files. The 7zip unarchiver is available at https://www.7-zip.org/.

.pdf Portable Document Format. Open with Adobe Acrobat Reader/Preview

.ppt Microsoft Powerpoint file. Open with Microsoft Powerpoint

.txt plain text file. Open with Notepad/TextEdit

.ods Open Document Spreadsheet. Open with LibreOffice/Microsoft Excel

_THESIS_.pdf

PDF FILE OF THE THESIS

Summary

fill in summary of entire thesis

Table of Contents

Summary

v

Declaration

vii

Acknowledgements

ix

Table of Contents

xi

Collected Chapter Summaries

List of Figures

1. Introduction

1

2. Background

5

3. Review of Literature

35

4. Development of the Scanner Hardware

55

5. Development of the Scanner Control Software

85

6. Two Dimensional Investigation of Stray Fields

133

7. Investigation of Three Dimensional Stray Field Structure

155

8. Investigation of Alternating Domain Dynamics

171

9. Conclusions

197

References

ccxli

\Figures Presentations\

Summary

Many of the figures in the Thesis represent dynamic animated data which cannot be presented as such on the printed page. Libre Office and Powerpoint presentations of all the figures in the thesis have been produced which include the animated versions of the data being discussed, to provide a simple and quick means of observing this data alongside the Thesis. The raw data underpinning these Figures and Animated GIFs is also then available in the appropriate 7z archive in the Data Arxive.

catalogue.csv

basic comma separated version of the catalogue of files and their descriptions

catalogue.ods

Open Document Spreadsheet version of the catalogue of files and their descriptions

dir.txt

full directory of files

Chapter 2 Figures.ppt, Chapter 2 Figures.odp

Powerpoint presentation of the figures in Chapter 2.

Chapter 4 Figures.ppt, Chapter 4 Figures.odp

Powerpoint presentation of the figures in Chapter 4. The raw data underpinning these figures is available in \Data Arxive\Chapter 4.7z (page 8).

Chapter 5 Figures.ppt, Chapter 5 Figures.odp

Powerpoint presentation of the figures in Chapter 5. The raw data underpinning these figures is available in \Data Arxive\Chapter 5.7z (page 11).

Chapter 6 Figures.ppt, Chapter 6 Figures.odp

Powerpoint presentation of the figures in Chapter 6. The raw data underpinning these figures is available in \Data Arxive\Chapter 6.7z (page 13).

Chapter 7 Figures.ppt, Chapter 7 Figures.odp

Powerpoint presentation of the figures in Chapter 7, including animated versions of the figures where appropriate. The raw data underpinning these figures and the animations is available in \Data Arxive\Chapter 7.7z (page 20).

Chapter 8 Figures.ppt, Chapter 7 Figures.ppt

Powerpoint presentation of the figures in Chapter 8, including animated versions of the figures where appropriate. The raw data underpinning these figures and the animations is available in \Data Arxive\Chapter 8.7z (page 27).

APPENDIX.pdf

PDF FILE OF THE APPENDIX

Summary

This Appendix Volume consists of six separate Appendices. Due to the number of pages and colour involved it is made available electronically through the ORCA repository at  http://orca.cf.ac.uk/id/eprint/133528 and through the included CD-ROM rather than printed. The Appendices contain the NI LabView code listings and descriptions of the three versions of the Scanner Control software, the technical design of the Scanner Hardware, a catalogue of the Data generated by this work (available under Open Access) and all published journal and conference papers. This Appendix volume is not intended to be read in its entirety, but as a reference source to which the text of the main Thesis links, and from which interested parties can obtain more complete detail than is pertinent to the main discussion, particularly with regard to the design and implementation of the Scanner Hardware and Software. Navigation throughout this volume can be made by hyperlink, by the page numbers provided in the Content and Elements Structure Index pages and also by the unique Element codes printed on the top right of each page.

Table of Contents

Summary

Aiii

Table of Contents

Av

Collected Appendix Summaries

Avii

Appendix 1 - Scanner Control 1 LabView VI Code

A1

Appendix 2 - Scanner Control 2 LabView VI Code

A73

Appendix 3 - Scanner Control 3 LabView VI Code

A239

Appendix 4 - Hardware Specifications and Datasheets

A469

Appendix 5 - Catalogue of Data

A563

Appendix 6 - Publications

A599

Catalogue of Data.pdf

THIS DOCUMENT

Summary

The Data which supports this thesis can be found on the included DVD and through the Cardiff Portal Arxive at http://doi.org/10.17035/d.2019.0079831572. A catalogue of the data available in the Data Arxive is presented, organised by Chapter. The Data from each Chapter are compressed in a 7zip archive (.7z). The 7zip unarchiver is available at https://www.7-zip.org/.

\Data Archive\Chapter 4.7z

Summary

Chapter 4 - Development of Scanner Hardware

The Scanner Hardware is built around a 3-axis positioning arm, controlled by Parker Automation drivers with a 3D-printed sensor enclosure, precision goniometer and integrated microscopic sight. Here the system requirements and architecture are discussed. Calibration of the hardware, particularly quantifying the slack/backlash of the three axis, and progressive improvement in the capabilities of the system and its sensors is recounted. The technical drawings for the developed 3D-printed sensor heads are provided. Detailed description and data-sheets for both the manufactured and purchased components of the Scanner Hardware are provided in Appendix 4.

7z Arxive Contents

catalogue.csv

basic comma separated version of the catalogue of files and their descriptions

catalogue.ods

Open Document Spreadsheet version of the catalogue of files and their descriptions

dir.txt

full directory of files

\Figure 4.6\

Caption:
Figure 4.6: Fine single-step voltage changes are plotted as the displacement sensor passes back and forth over the same location repeatedly. The displacement between the forward and reverse paths represents the backlash in the thread of the (a) X, (b) Y and (c) Z axis when the motors change direction. The finely tuned Xs(38), Ys(130) and Zs(195) constants reduce this displacement in the Scanner Control software.
Files to support.

\Figure 4.7\

Caption:
Figure 4.7: Scan with the D6 displacement sensor of a 1p coin (a) at 1mm/pixel resolution with the backlash compensation disabled, illustrating the distortion from circular due to “scanner drift”; (b) at 0.25mm/pixel with the backlash compensation engaged illustrating the lack of “scanner drift”; and (c) at 0.025mm/pixel with 608000 pixels illustrating the effectiveness of the backlash compensation in preventing any drift.
(a) 1p coin scanned without slack/backlash correction @ 1mm/pixel
1pcoin@4000scoff [S].csv
Originally scanned with: SC2 D6 Displacement Sensor
original file:
2016\09 First Version 2 Scans (090616-)\01 1p@4000{reflectance}.csv
pixel dimensions:
20x22 @4000steps/pixel 440 cells
sample dimensions:
20mm x 22mm @ 1mm/pixel
(b) 1p coin scanned with correction @ 0.25mm/pixel
1pcoin@1000 [S].csv
Originally scanned with: SC2 D6 Displacement Sensor
original file:
2016\09 First Version 2 Scans (090616-)\03 1p@1000{reflectance}.csv
pixel dimensions:
80x76 @1000steps/pixel 6080 cells
sample dimensions:
20mm x 19mm @ 0.25mm/pixel
(c) 1p coin scanned with correction @ 0.025mm/pixel
1pcoin@100 [S].csv
Oiginally scanned with: SC2 D6 Displacement Sensor
original file:
2016\09 First Version 2 Scans (090616-)\01 1p@4000{reflectance}.csv
pixel dimensions:
800x760 @100steps/pixel 608000 cells
sample dimensions:
20mm x 19mm @ 0.025mm/pixel

\Figure 4.10\

Caption:
Fgure 4.10: (a) Photograph of Philtec D6 displacement sensor reproduced from [116], (b) Photograph of Philtec RC20 displacement sensor reproduced from [117], (c) calibration curves of Philtec
RC20 reflection compensated displacement sensor, determined as Voltage output against the vertical displacement from a mirrored surface obtained using the Scanner systems z-axis control. The M
crosses represent displacements achieved manually using the sample stage micrometer adjustment, the S lines represent continuous single stepping displacements achieved with the z-axis stepper
motor. Both the sensor voltage (RC20) and a signal-to-noise (SNR) levels are presented.
Files to support.

\Figure 4.12\

Caption:
Figure 4.12: (a) The Long solenoid used to produce a varying magnetic field for both the STJ-020 TMR and Lakeshore 475 DSP sensors. (b) and (c) the two sensors mounted alongside on the carrier to be positioned in the centre of the coil. The Calibration of the STJ-020 voltage the Field Strength as measured by the Lakeshore 475 DSP as connected with the Potential Divider (d) and Low Pass Filter (e). For (d), blue crosses are the mean of 10 surrounding samples. Error bands indicated with dotted lines.
Files to support.

\Figure 4.14\

Caption:
Figure 4.14: (a) Sensor Head Version 1 illustration and photograph, (b) Sensor Head Version 2 illustration and photograph, (c) Sensor Head Version 3 illustration and photograph. Dimensions in mm.
.stl files for 3D printing each component

\Figure 4.17\

Caption:
Figure 4.17: Calibration of the field strength of the second set of Coils, two parallel 50 turn windings on sleeves which fit wither end of any sample. The coils have a total resistance of 1O. When energised by a power oscillator the combined field strength amplitude of the two coils has been measured as 2.164 Am-1/Volt with the Lakeshore 475 DSP gaussmeter.
Files to support.

\Data Archive\Chapter 5.7z

Summary

Chapter 5 - Development of the Scanner Control Software

As the requirements of the Scanner and the understanding of LabVIEW architecture increased three distinct main versions of the Scanner Control Software were developed. The complete structure and functional logic of each Scanner Control system is described in detail in Appendix 1, Appendix 2 and Appendix 3. The pertinent points of the development of the software and its functions are recounted here along with detailed guidance on the practical operation of the final Scanner Control 3 system.

7z Arxive Contents

catalogue.csv

basic comma separated version of the catalogue of files and their descriptions

catalogue.ods

Open Document Spreadsheet version of the catalogue of files and their descriptions

dir.txt

full directory of files

\SCANNER CONTROL 1\

NI Labview files for Scanner Control 1 Software

\SCANNER CONTROL 2\

NI Labview files for Scanner Control 2 Software

\SCANNER CONTROL 3\

NI Labview files for Scanner Control 3 Software

\Blank [D] [S] [P] Examples\

Example Blank Static [S], Dynamic [D] and PNG [P] files created by the SCANNER CONTROL 3 system

\Instructional Video\

Summary

A video demonstration of how to perform scans with the Scanner Control (Version 3) software. The video is best watched alongside the text based instructions provided in Chapter 5 of the Thesis and reproduced here as Scanner Control Instructions.pdf. The Examples Files.7z archive provides all the data files produced and used during the demonstration video. These files are also reproduced within the \Data Arxive\Chapter 5.7z arxive (page 11).

Scanner Control Instructions.pdf - Text based guide to the use of the Scanner and the SCANNER CONTROL 3 software Scanner Control Instructional Video.mov - Video based guide to the use of the Scanner and the SCANNER CONTROL 3 software

\Instructional Video\Example Files\

Example files created during the Instructional Video and the text based guide

Scanner Control Instructions.pdf - Text based guide to the use of the Scanner and the SCANNER CONTROL 3 software Scanner Control Instructional Video.mov - Video based guide to the use of the Scanner and the SCANNER CONTROL 3 software

\Instructional Video\Example Files\

Example files created during the Instructional Video and the text based guide

\Data Archive\Chapter 6.7z

Summary

Chapter 6 - Two Dimensional Investigation of Stray Fields

The study of the domain structure in Grain Oriented Electrical Steel, Amorphous Alloy materials, Cubex doubly oriented Si-Fe Alloy and manufactured Planar coils by the scanning of stray fields from the sample surface has been made. interpretation of the resulting field maps and comparison of the advantages and disadvantages of the Scanning System over other domain observation methods is given.

7z Arxive Contents

catalogue.csv

basic comma separated version of the catalogue of files and their descriptions

catalogue.ods

Open Document Spreadsheet version of the catalogue of files and their descriptions

dir.txt

full directory of files

\Figure 6.1\

Caption:
Figure 6.1: Scans of 25 x 25 mm2 of polished 3% Si Grain Oriented Electrical Steel with; (a) Philtec RC20 displacement sensor and (b) Micromagnetics STJ-020 TMR sensor at 0.05mm/cell resolution. A higher resolution scan of the green highlighted region and indicated domains is presented in Figure 6.2. Scans of 10 x 10 mm2 of coated 3% Si Grain Oriented Electrical Steel with; (c) Lakeshore 475 DSP Gaussmeter Hall-effect sensor and (d) Micromagnetics STJ-020 TMR sensor at 0.05mm/cell resolution. The corresponding region of the sample is indicated. The domain patterns are altered by magnetisation cycles between change of sensors. The Hz stray field strength (A/m) is indicated by a greyscale with positive field out of the page.
(a) RC20 Displacement
Originally scanned with: SC2
original file:
2016\26 RC20 scan of steel sample\Grain Oriented @ 200.csv
pixel dimensions:
520x500 @200steps/pixel (0.31 to 4.56) 260000 cells
sample dimensions:
26mm x 25mm @ 0.05mm/pixel (0.0 to 0.35 mm)
(b) 1st STJ-020 TMR
Originally scanned with: SC2
original file:
2016\15 Electrical Steel Sample Area Scans (10-210716)\Electrical steel full scan.csv
pixel dimensions:
520x500 @200steps/pixel (-0.76 to 1.06) 260000 cells
sample dimensions:
26mm x 25mm @ 0.05mm/pixel (-170 to 170 A/m) PD
(c) Lakeshore
Originally scanned with: SC3
original file:
2019\05 New New sig gen 50 winding coils (LS)\200x200 (200) grid\post dynamic 200x200 (200) grid 160519 [S].csv
pixel dimensions:
200x200 @200steps/pixel (-0.11 to 0.13) 40000 cells
sample dimensions:
10mm x 10mm @ 0.05mm/pixel (-110 to 130 A/m)
(d) 3rd STJ-020 TMR
Originally scanned with: SC3
original file:
2019\07 NEW TMR SENSOR\200x200 (200)\200x200 (200) pre dynamic static 220519 [S].csv
pixel dimensions:
200x200 @200steps/pixel (-1.71 to 1.47) 40000 cells
sample dimensions:
10mm x 10mm @ 0.05mm/pixel (-486 to 486 A/m) NS

\Figure 6.10\

Caption:
Figure 6.10: Hz amplitude plots of the (a) and (b) Circular and (c) Square planar coils along the paths indicated by red single-chevrons in Figure 6.9 at a scan height of (a) 0.50 mm ± 0.01 mm, (b) and (c) 0.15 mm ± 0.01 mm. The ± errors are indicated by dashed lines above and below for both the Scan and ANSYS plots.
Circular Planar Transect.ods
Circular Planar Transect.xls
Square Planar Transect.ods
Square Planar Transect.xls
Microsoft Excel .xls and Libre Office .ods spreadsheets of the data which produces the transect profiles

\Figure 6.11\

Caption:
Figure 6.11: Scan of (a) 20 x 20 mm2 region of Cubex doubly oriented Silicon-iron alloy. produced with the STJ-020 sensor at 0.05 mm/cell, with an indicated (b) 7 x 7 mm2 region at 0.01 mm/cell. The Stray field strength ranges from -135 to 216 A/m. The indicated further 2 x 2 mm2 region is presented in Figure 7.1.
(a) @200
Originally scanned with: SC2
original file:
2017\15 Cubix Scan\Cubix Scan @200 230517.csv
pixel dimensions:
400x400 @200steps/pixel (-0.776 to 1.1) 160000 cells
-40000 to 40000,-40000 to 40000
sample dimensions:
20mm x 20mm @ 0.05mm/pixel (-135 to 216 A/m)
(b) @40
Originally scanned with: SC2
original file:
2017\15 Cubix Scan\Cubix Scan @40 280517.csv
pixel dimensions:
725x700 @40steps/pixel (-1.06 to 0.992) 8040 cells
10000 to 39000,-14000 to 14000
sample dimensions:
7.25mm x 7mm @ 0.01mm/pixel (-181 to 194 A/m)

\Figure 6.2\

Caption:
Figure 6.2: Domain observation of the 7.5 x 7.5 mm2 region of polished 3% Si Grain Oriented Electrical Steel from Figure 6.1(b) produced by; (a) Scan with STJ-020 and (b) MOKE imaging of the same area of sample. The pinhole used to identify the common area and corresponding magnetic domain features are indicated with blue dotted lines. The regions of the scans of Figure 6.4 and Figure 7.5 are highlighted in green.
(a) Scan @40
Polished 4-hole Grain Oriented Steel Sample
Originally scanned with: SC2
original file:
2017\12Repeated GO steel Kerr Comparison with level\GO Steel @40 040517.csv
pixel dimensions:
750x750 @40steps/pixel (-0.237 to 1.92) 562500 cells
sample dimensions:
7.5mm x 7.5mm @ 0.01mm/pixel (-221 to 221 A/m) PD
(b) Kerr Images
Polished 4-hole Grain Oriented Steel Sample
viewed with Paul’s MOKE setup
original file:
Image Work\GO Kerr 2\Go Kerr 2 raw tiffs
raw un-merged original TIFFs converted to JPG

\Figure 6.3\

Caption:
Figure 6.3: Raw Images from the MOKE system; (a) uncleaned sample, (b) cleaned sample, indicating the very narrow depth of field. The indicated narrow bands of in-focus image need to be manually combined to produce a coherent image of a large area (c), which retains perspective distortion.
(a) Kerr Images
Unclean Polished 4-hole Grain Oriented Steel Sample
viewed with Paul’s MOKE setup
original file:
Image Work\Electrical Steel Kerr\raw\Row 3\Capture - 2560 x 2048 [14-29-57].jpg
Image Work\Electrical Steel Kerr\raw\…
original JPGs (half size)
(b) Kerr2 Images
Polished 4-hole Grain Oriented Steel Sample
viewed with Paul’s MOKE setup
original file:
Image Work\GO Kerr 2\Go Kerr 2 raw tiffs
raw un-merged original TIFFs converted to JPG
(c) Unmerged xcf file
Polished 4-hole Grain Oriented Steel Sample
viewed with Paul’s MOKE setup
original file:
Image Work\GO Kerr 2\Go Kerr 2.png
Image Work\GO Kerr 2\Go Kerr 2 Unmerged.xcf
unmerged combination of raw TIFFs in xcf format - open with GIMP
(The GNU Image Manipulation Program)

\Figure 6.4\

Caption:
Figure 6.4: Domain observation of the 3.5 x 2.14 mm2 region of polished 3% Si Grain Oriented Electrical Steel from Figure 6.2(a) produced by a scan with the STJ-020 sensor at 0.005 mm/cell. The Stray field strength ranges over ± 220 A/m. The location of the zx Transect presented in Figure 7.5 is illustrated.
Originally scanned with: SC2
original file:
2017\12 Repeated GO steel Kerr Comparison with level\GO Steel @20 080517.csv
pixel dimensions:
700x428 @20steps/pixel (-0.237 to 1.92) 321000 cells
sample dimensions:
3.5mm x 2.14mm @ 0.005mm/pixel (-220.0 to 220 A/m)

\Figure 6.5\

Caption:
Figure 6.5: Domain observation of (a) 23 x 18 mm2 region of Laser Etched Coated 3% Si Grain Oriented Electrical Steel produced by a scan with the STJ-020 sensor at 0.1 mm/cell with the 19.5 x 5 mm2 region (b) indicated, scanned at 0.01 mm/cell. The Stray field strength ranges over ± 350 A/m. The coating is etched with a 10.6 μm wide CO2 laser at 14% of 50 W power along the lines indicated. (c) Photograph of the scanning through the incorporated microscopic sight.
(a) Laser Etched GOES
Originally scanned with: SC2
original file:
2018\04 Laser Etched GOES\Laser Etched GOES @400.csv
pixel dimensions:
230x180 @400steps/pixel (-1.16 to 1.16) 41400 cells
sample dimensions:
23mm x 18mm @ 0.1mm/pixel (-350 to 350 A/m)
LP
(b) Laser Etched GOES CU
Originally scanned with: SC2
original file:
2018\04 Laser Etched GOES\Laser Etched GOES @40.csv
pixel dimensions:
1950x500 @40steps/pixel (-1.16 to 1.16) 975000 cells
sample dimensions:
19.5mm x 5mm @ 0.01mm/pixel (-350 to 350 A/m)
LP

\Figure 6.6\

Caption:
Figure 6.6: Scan of of (a) 19 x 12 mm2 region of as-cast 2605 Co IPF895 Metglas Alloy Amorphous Ribbon produced with the STJ-020 sensor at 0.05 mm/cell, the indicated (b) 6.85 x 6.4 mm2 at 0.01 mm/cell and (c) 0.5 x 0.5 mm2 at 0.005 mm/cell. The Stray field strength ranges over ± 88 A/m.
(a) Large Amorphous Ribbon @200
Originally scanned with: SC2
original file:
2017\14 Amorphous Ribbon Large Scan\Large Amorphous Ribbon Scan @200 150517.csv
pixel dimensions:
380x240 @200steps/pixel (0.096 to 0.774) 91200 cells
sample dimensions:
19mm x 12mm @ 0.05mm/pixel (-84 to 84 A/m)
(b) Large Amorphous Ribbon @40
Originally scanned with: SC2
original file:
2017\14 Amorphous Ribbon Large Scan\Large Amorphous Ribbon Scan @40 190517.csv
pixel dimensions:
685x640 @40steps/pixel (-88 to 88) 438400 cells
sample dimensions:
6.85mm x 6.4mm @ 0.01mm/pixel (15 to 160 A/m)
(c) Large Amorphous Ribbon @20
Originally scanned with: SC2
original file:
2017\14 Amorphous Ribbon Large Scan\Large Amorphous Ribbon Scan @20 220517.csv
pixel dimensions:
100x100 @20steps/pixel (-0.696 to 0.277) 10000 cells
sample dimensions:
0.5mm x 0.5mm @ 0.005mm/pixel (-88 to 88 A/m)

\Figure 6.7\

Caption:
Figure 6.7: Progressively higher resolution scans of the top of AF-10 Amorphous wire; (a) at 0.005 mm/cell, (b) at 0.002 mm/cell and (c) at 0.001 mm/cell. The Stray field strength in the final 0.001 mm/cell scan ranges over ± 80 A/m, with distinct features 30µm apart.
(a) @20
Originally scanned with: SC2
original file:
2017\11 AF10 Amorphouse Wire Scans\Single AF10 126x134@20 130417.csv
pixel dimensions:
126x134 @20steps/pixel (-0.062 to 3.54) 16884 cells
2520 to 5040,-15200 to -12520
sample dimensions:
0.63mm x 0.67mm @ 0.005mm/pixel (-422 to 422 A/m)
(b) @8
Originally scanned with: SC2
original file:
2017\11 AF10 Amorphouse Wire Scans\Single AF10 126x64@8 130417.csv
pixel dimensions:
120x67 @8steps/pixel (0.487 to 2.19) 8040 cells
3630 to 4590,-13110 to -12574
sample dimensions:
0.24mm x 0.134mm @ 0.002mm/pixel (-279 to 279 A/m)
(c) @4
Originally scanned with: SC2
original file:
2017\11 AF10 Amorphouse Wire Scans\Single AF10 126x64@4 130417.csv
pixel dimensions:
44x118 @4steps/pixel (1.14 to 1.86) 5192 cells
4058 to 4234,-13074 to -12602
sample dimensions:
0.044mm x 0.118mm @ 0.001mm/pixel (-80 to 80 A/m)

\Figure 6.9\

Caption:
Figure 6.9: Comparison of ANSYS FEM and Scans of Planar Coils. (a) Circular, (b) Mesh, (c) Meander, (d) and Square planar coils. (i) Photographs of the manufactured coils, (ii) ANSYS models, (iii) Hz stray field scans with the TMR-020 sensor at 0.1 mm/pxl, (iv) FEM of the Hz fields above the coils.(iii') and (iv') are scans of the Circular coil at a closer scan height. The transect marked by red single-chevrons indicates the path of Hz amplitude plots (Figure 6.10). The blue double-chevrons indicate the path of the zx Transect presented in (Figure 7.5).
(i) Photographs of coils
(a) Circular Planar.jpg
(b) Mesh Panar.jpg
(c) Meander Planar.jpg
(d) Square Planar.jpg
(ii) Ansys Models
(a) Circular Planar Coil (z0.15 mesh 2).aedt
(a) Circular Planar Coil (z0.5 mesh 2).aedt
(b) Mesh Planar Coil (z0.25 mesh 2).aedt
(c) Meander Planar Coil (z0.25 mesh 2).aedt
(d) Square Planar Coil (z0.15 mesh 2).aedt
files can be opened with Ansys Maxwell
(iii) Scans
(a) Circular
Originally scanned with: SC2
original file:
\2017\17 Planar Coils\Circular Planar Coil (0_4 amps closer).csv
\2017\17 Planar Coils\Circular Planar Coil (0_4 amps).csv
pixel dimensions:
253x82 @400steps/pixel (-0.52 to 1.32) 20746 cells PD
253x250 @400steps/pixel (-0.47 to 1.25) 260000 cells PD
sample dimensions:
25.3mm x 8.2mm @ 0.1mm/pixel (-92 to 264 A/m)
25.3mm x 25mm @ 0.1mm/pixel (-85 to 248 A/m)
(b) Mesh
Originally scanned with: SC2
original file:
\2017\17 Planar Coils\Mesh Panar Coil (0_4amps).csv
pixel dimensions:
243x242 @400steps/pixel (-0.55 to 0.72) 58806 cells PD
sample dimensions:
24.3mm x 24.2mm @ 0.1mm/pixel (-97 to 138 A/m)
(c) Meander
Originally scanned with: SC2
original file:
\2017\17 Planar Coils\Meander Planar Coil (0_4amps).csv
pixel dimensions:
260x223 @400steps/pixel (-0.49 to 0.55) 57980 cells PD
sample dimensions:
26mm x 22.3mm @ 0.1mm/pixel (-87 to 104 A/m)
(d) Square
Originally scanned with: SC2
original file:
\2017\17 Planar Coils\Square Planar Coil (0_4amps).csv
pixel dimensions:
260x257 @400steps/pixel (-0.67 to 1.45) 57980 cells PD
sample dimensions:
26mm x 25.7mm @ 0.1mm/pixel (-118 to 293 A/m)
(iv) Ansys FEM
(a) Circular Planar Coil (z0.15 mesh 2).aedt
(a) Circular Planar Coil (z0.5 mesh 2).aedt
(b) Mesh Planar Coil (z0.25 mesh 2).aedt
(c) Meander Planar Coil (z0.25 mesh 2).aedt
(d) Square Planar Coil (z0.15 mesh 2).aedt
files can be opened with Ansys Maxwell

\Data Archive\Chapter 7.7z

Summary

Chapter 7 - Investigation of Three Dimensional Stray Field Structure

With the development of Scanner Control 2 and later 3 it became possible to scan not only in the xy plane, but also different layers of xy planes in steps along the z axis. Thus forming a cuboid of three dimensional cells, or a scan of the volume above the surface of a sample. The purpose is to allow the novel investigation of the shape and extent of the stray fields as they extend beyond the sample surface. With the development of the second, and then ultimately the third sensor head the TMR Sensor could additionally scan not only the field component perpendicular to the surface, but at any intermediate angle. By scanning twice, vertically and at 45 degree counter-clockwise from vertical it is possible to calculate both the H_z and H_x components from only a single axis sensor.

7z Arxive Contents

catalogue.csv

basic comma separated version of the catalogue of files and their descriptions

catalogue.ods

Open Document Spreadsheet version of the catalogue of files and their descriptions

dir.txt

full directory of files

\Figure 7.1\

Caption:
Figure 7.1: Scan of Hz stray fields within a volume of 2 x 2 x 0.2 mm3 above the sample of Cubex doubly oriented Silicon-iron alloy produced with the STJ-020 sensor at 0.02 x 0.02 x 0.002 mm/cell resolution. The area scanned is highlighted in Figure 6.11. The lowest xy Plane is presented along with ten different zx Slices at the indicated locations along the y-axis. Animated sweeps through each xy Plane and each zx Slice are available in the Chapter 7.7z ORCA arxive (page ix). The Hz Stray field strength ranges over ± 200 A/m.
Originally scanned with: SC2
Sensor Vertical (0 Degrees)
- @10 [S].csv
Originally scanned with: SC2
original file:
2017\15 Cubix Scan\Cubix Scan @10 090617 reconstruction.csv
pixel dimensions:
800x789 @10steps/pixel (-1.17 to 1.3) 631200 cells
20000 to 28000,-4010 to 3880
sample dimensions:
2mm x 1.9725mm @ 0.0025mm/pixel (-200 to 260 A/m)
- Cubex Cube (0Deg) [S].csv
original file:
2017\15 Cubix Scan\Cubix Cube 040617.csv
pixel dimensions:
100x100x100 @80x80x8 steps/pixel (-1.19 to 1.02) 125000 cells
z axis is 10 times the resolution of the xy axis
sample dimensions:
2mm x 2mm x 0.2mm @ 0.02mm x 0.02mm x 0.002mm/pixel (-200 to 200 A/m)

\Figure 7.10\

Caption:
Figure 7.10: A stray field scan of fields within a volume of 10 x 10 x 0.5mm above a sample of Coated 3% Si Grain Oriented Electrical Steel produced by a scan with the STJ-020 sensor at 0.5 x 0.5 x 0.05 mm/cell. Measured (a) Hz and (b) H45 fields along with calculated (c) Hx fields are presented (i). Colour representation of the stray field H vector is presented (ii) with 20 different zx Slices at the indicated locations along the y-axis. The colour representation of the H stray field vector is presented in (c.ii). Animated sweeps through each xy Plane and each zx Slice are available in the Chapter 7.7z arxive (page ix).
(a) 0deg [S].csv
Originally scanned with: SC3
original file:
2019\09 ES Volume Scan\0Deg Static 120619 [D].zip
pixel dimensions:
200x200x10 @200x200x200steps/pixel (-0.5 to 0.728) 400000 cells
sample dimensions:
10mm x 10mm x 0.5mm @ 0.05x0.05x0.05mm/pixel (-153 to 223 A/m)
LP
(b) 45deg [S].csv
Originally scanned with: SC3
original file:
2019\09 ES Volume Scan\45Deg CCW Static 130619 [D].zip
pixel dimensions:
200x200x10 @200x200x200steps/pixel (-0.063 to 0.523) 400000 cells
sample dimensions:
10mm x 10mm x 0.5mm @ 0.05x0.05x0.05mm/pixel (-19 to 160 A/m)
LP
(c) zx Combine (-0,655 to 0,655) [S].csv
Originally scanned with: SC3
pixel dimensions:
240x248 @400steps/pixel (-0.655 to 0.655) 59520 cells
sample dimensions:
24mm x 24.8mm @ 0.1mm/pixel (-200 to 200 A/m)
LP

\Figure 7.2\

Caption:
Figure 7.2: Scan of Hz stray fields within a volume of 0.5 x 0.5 x 0.1 mm3 above the sample of as-cast 2605 Co IPF895 Metglas Alloy Amorphous Ribbon produced with the STJ-020 sensor at 0.01 x 0.01 x 0.002 mm/cell resolution. The area scanned is highlighted in Figure 6.6. The lowest xy Plane is presented along with five different zx Slices at the indicated locations along the y-axis. Animated sweeps through each xy Plane and each zx Slice are available in the Chapter 7.7z ORCA arxive (page ix). The Hz Stray field strength ranges over ± 88 A/m.
Originally scanned with: SC2
Sensor Vertical (0 Degrees)
original file:
2017\14 Amorphous Ribbon Large Scan\Amorphous Ribbon Cube Scan 220517.csv
50x50x50 @40x40x8 steps/pixel (-0.847 to 0.164) 160000 cells
z axis resolution is 5 times greater than xy resolution
sample dimensions:
0.5mm x 0.5mm x 0.1mm @ 0.01 x 0.01 x 0.002mm/pixel (-88 to 88 A/m)

\Figure 7.4\

Caption:
Figure 7.4: A scan of a volume of of 2 x 2 x 0.5 mm3 above the sample of polished 3% Si Grain Oriented Electrical Steel produced with the STJ-020 sensor at 0.13 mm/cell resolution mounted in Sensor Head 2. Two consecutive scans with a sensor tilt of 5° (a) counterclockwise and (b) clockwise are combined to produce a (c) colour representation of the stray field H vector. Only one zx Slice is presented at the indicated location on the lowest xy Plane. (d) The colour representation of the H stray field vector. The Hz stray field strength ranges over ± 139 A/m and the Hx stray field strength ranges over ± 38 A/m. Some indication of the rotation of the H vector is illustrated in (c). Animated sweeps through each xy Plane and each zx Slice are available in the Chapter 7.7z arxive (page ix).
(a) 5deg CCW @400
Originally scanned with: SC2, Sensor Head 2
original file:
2017\01 New Scanner Head\400\Scan of GO steel CCW 180116 @400.csv
pixel dimensions:
20x20x5 @400x400x400steps/pixel (-0.234 to 0.124) 2000 cells
sample dimensions:
2mm x 2mm x 0.5mm @ 0.1x0.1x0.1mm/pixel (-33 to 33 A/m)
(b) 5deg CW @400
Originally scanned with: SC2, Sensor Head 2
original file:
2017\01 New Scanner Head\400\Scan of GO steel CW 180116 @400.csv
pixel dimensions:
20x20x5 @400x400x400steps/pixel (-0.25 to 0.116) 2000 cells
sample dimensions:
2mm x 2mm x 0.5mm @ 0.1x0.1x0.1mm/pixel (-33 to 33 A/m)
(c) zx Combine @400
pixel dimensions:
20x20x5 @400steps/pixel (-0.21 to 0.09) 2000 cells Z
20x20x5 @400steps/pixel (-0.80 to 0.86) 2000 cells X
sample dimensions:
2mm x 2mm @ 0.01mm/pixel (-38 to 16 A/m)
PD Z
2mm x 2mm @ 0.01mm/pixel (-139 to 139 A/m)
PD X

\Figure 7.5\

Caption:
Figure 7.5: (a) Illustration of the three-dimensional relationship between zx Transect scans of polished 3% Si Grain Oriented Electrical Steel above the surface of the sample at the location indicated in Figure 6.4. (b) Scans of the stray field strength at 0°, 5°, 10°, 15°, 20° counterclockwise to perpendicular above the sample forming 2.35 x 0.1 mm zx Transects at 0.005 x 0.005 x 0.002mm/cell resolution. The Hϑ Stray field strength ranges from -116 to 270 A/m. An animated sweep through each angle is available in the Chapter 7.7z arxive (page ix).
Originally scanned with: SC2
original file:
2017\13 Angled Volumetric Slices\Transect(8)@0deg.csv
2017\13 Angled Volumetric Slices\Transect(8)@10deg.csv
2017\13 Angled Volumetric Slices\Transect(8)@15deg.csv
2017\13 Angled Volumetric Slices\Transect(8)@20deg.csv
2017\13 Angled Volumetric Slices\Transect(8)@5deg.csv
pixel dimensions:
470x1x50 @20x20x8steps/pixel (-0.66 to 1.35) 23500 cells
470x1x50 @20x20x8steps/pixel (-0.846 to 1.17) 23500 cells
470x1x50 @20x20x8steps/pixel (-0.658 to 1.02) 23500 cells
470x1x50 @20x20x8steps/pixel (-0.492 to 1.18) 23500 cells
470x1x50 @20x20x8steps/pixel (-0.631 to 0.971) 23500 cells
sample dimensions:
2.35mm x 0.005mm x 0.1mm @ 0.005x0.005x0.002mm/pixel (-116 to 270 A/m)
2.35mm x 0.005mm x 0.1mm @ 0.005x0.005x0.002mm/pixel (-147 to 232 A/m)
2.35mm x 0.005mm x 0.1mm @ 0.005x0.005x0.002mm/pixel (-116 to 200 A/m)
2.35mm x 0.005mm x 0.1mm @ 0.005x0.005x0.002mm/pixel (-87 to 234 A/m)
2.35mm x 0.005mm x 0.1mm @ 0.005x0.005x0.002mm/pixel (-111 to 189 A/m)
the z resolution is 2.5 times the xy resolution
transects only have 1 cell on the y axis
view with xy>xz switch

\Figure 7.7\

Caption:
Figure 7.7: Comparison of scans of the Square planar coil with the STJ-020 sensor compared with ANSYS FEM of the corresponding topology. (i) xy Scans of the Square planar coil (ii) FEM of the fields from xy plane, (iii) zx Transect scan of the Square planar coil (iv) FEM of the fields from the zx plane; (a) Hz, (b) H45, (c) Hx. Colour representation of the stray field H vector are presented as scanned (a.v) and (b.v) and from FEM (a.vi) and (b.vi). (c.v) The colour representation of the H stray field vector.
(i) Scan xy Plane
(a) Square Planar Coil 0deg
Originally scanned with: SC2
original file:
2017\17 Panar Coils\Square Planar Coil (0_4amps).csv
pixel dimensions:
260x257 @400steps/pixel (-0.67 to 1.45) 66820 cells
sample dimensions:
26mm x 25.7mm @ 0.1mm/pixel (-118 to 293 A/m)
PD
(b) Square Planar Coil 45deg
Originally scanned with: SC2
original file:
2017\17 Panar Coils\Square Planar Coil (0_4amps45degs).csv
pixel dimensions:
260x257 @400steps/pixel (-0.55 to 1.12) 66820 cells
sample dimensions:
26mm x 25.7mm @ 0.1mm/pixel (-97 to 221 A/m)
PD
(c) zx Combine Square Planar
pixel dimensions:
260x257 @400steps/pixel (-0.865 to 1.482) 66820 cells
sample dimensions:
26mm x 25.7mm @ 0.1mm/pixel (-150 to 300 A/m)
PD
(ii) ANSYS xy Plane
Square Planar Coil (z0.15 mesh 2).aedt
for use in ANSYS Maxell software
(iii) Scan zx Transect
(a) Transect 0deg
Originally scanned with: SC2
original file:
2017\18 zx Planar Coils\second track\0 deg square - second track.csv
pixel dimensions:
248x1x1000 @400x400x40steps/pixel (-1.3 to 1.57) 248000 cells
sample dimensions:
24.8mm x 0.01mm x 10mm @ 0.1 x 0.1 x 0.01mm/pixel (-220 to 320 A/m)
PD
(b) Transect 45deg
Originally scanned with: SC2
original file:
2017\18 zx Planar Coils\second track\45 deg square - second track.csv
pixel dimensions:
248x1x1000 @400x400x40steps/pixel (-0.933 to 1.32) 248000 cells
sample dimensions:
25.2mm x 0.01mm x 10mm @ 0.1 x 0.1 x 0.01mm/pixel (-161 to 264 A/m)
PD
(c) zx Combine Transect
pixel dimensions:
252x1x100 @400x400x40steps/pixel (-0.865 to 1.482) 248000 cells
sample dimensions:
25.2mm x 0.01mm x 10mm @ 0.1 x 0.1 x 0.01mm/pixel (-150 to 300 A/m)
PD
(iv) ANSYS zx Transect
Square Planar Coil (z0.15 mesh 2) xz-plane.aedt
for use in ANSYS Maxell software

\Figure 7.9\

Caption:
Figure 7.9: A stray field scan of 24 x 20 mm Coated 3% Si Grain Oriented Electrical Steel produced by a scan with the STJ-020 sensor at 0.13 mm/cell (i) Before and (ii) After etching the coating with a 10.6 μm wide CO2 laser at 14% of 50 W (Figure 7.8). Measured (a) Hz and (b) H45 fields along with calculated (c) Hx fields are presented. Colour representation of the stray field H vector is presented before (a.iii) and after (b.iii) etching. The colour representation of the H stray field vector is presented in (c.iii).
(a) Before 0deg
Originally scanned with: SC2
original file:
2018\06 Laser Etched GOES 2 (before and after)\Laser Etch GOES z@400 150318.csv
pixel dimensions:
240x248 @400steps/pixel (-0.834 to 0.659) 59520 cells
sample dimensions:
24mm x 24.8mm @ 0.1mm/pixel (-255 to 202 A/m)
LP
(b) Before 45deg
Originally scanned with: SC2
original file:
2018\06 Laser Etched GOES 2 (before and after)\Laser Etch GOES z@400 45deg 280318.csv
pixel dimensions:
240x248 @400steps/pixel (-0.393 to 0.943) 59520 cells
sample dimensions:
24mm x 24.8mm @ 0.1mm/pixel (-205 to 205 A/m)
LP
(c) After 0deg
Originally scanned with: SC2
original file:
2018\06 Laser Etched GOES 2 (before and after)\Laser Etch GOES after etching z@400 170418.csv
pixel dimensions:
240x248 @400steps/pixel (-0.215 to 1.16) 59520 cells
sample dimensions:
24mm x 24.8mm @ 0.1mm/pixel (-210 to 210 A/m)
LP
(d) After 45deg
Originally scanned with: SC2
original file:
2018\06 Laser Etched GOES 2 (before and after)\Laser Etch GOES after etching z@400 45deg 190418.csv
pixel dimensions:
240x248 @400steps/pixel (-0.387 to 0.911) 59520 cells
sample dimensions:
24mm x 24.8mm @ 0.1mm/pixel (-199 to 199 A/m)
LP
(e) Before zx Combine
pixel dimensions:
240x248 @400steps/pixel (-0.655 to 0.655) 59520 cells
sample dimensions:
24mm x 24.8mm @ 0.1mm/pixel (-200 to 200 A/m)
LP
(f) After zx Combine
pixel dimensions:
240x248 @400steps/pixel (-0.655 to 0.655) 59520 cells
sample dimensions:
24mm x 24.8mm @ 0.1mm/pixel (-200 to 200 A/m)
LP

\Data Archive\Chapter 8.7z

Summary

Chapter 8 - Investigation of Alternating Domain Dynamics

The Scanner Control 3 software was specifically developed with the aim of investigating the dynamics of domains as they change under the influence of an alternating externally applied field. Dynamic scans of samples are presented here as a filmstrip within the thesis, with fully animated versions of each figure available as animated GIFs in Chapter 8.7z of the Cardiff Portal Arxive (page ix) and on the accompanying DVD. Presentations with the animated GIFs embedded are also provided for each of the figures in the /Figures Presentations/ folder of Arxive.

7z Arxive Contents

catalogue.csv

basic comma separated version of the catalogue of files and their descriptions

catalogue.ods

Open Document Spreadsheet version of the catalogue of files and their descriptions

dir.txt

full directory of files

\Figure 8.1\

Caption:
Figure 8.1(a): Filmstrip representation of a dynamic scan of the Square Planar coil
(Figure 6.9(d.i)) energised at 3kHz with ± 0.2 V. Scan made with the Lakeshore 476 DSP Gaussmeter at 1kHz sampling rate. 336 frames represent 1 cycle. The full animated GIF is provided in Chapter 8.7z of the Cardiff Portal Arxive (page ix) and on the accompanying DVD. The stray field strength (Hz) is represented in greyscale from -300 to 300 A/m.
LS Square Planar Coil [D].zip
Originally scanned with: SC3 with Lakeshore Sensor
original file:
\2018\14 Lakeshore Probe\[Dynamic] LP Planar Coil synced 060718.zip
pixel dimensions:
220x220 @400steps/pixel
sample dimensions:
22 mm x 22 mm @ 0.1mm/pixel
samples/frequency: 1000,1000
Energised with: Planar Coil Self Energised @ 3kHz
Source Ranges:
1 RC20a -10 10 x not used
2 RC20b -10 10 x not used
3 TMR -3.3 2.718 Lakeshore Sensor (-330 to 271 A/m)
4 Yoke -0.158 0.224 Planar Coil
Number of Frames for one complete cycle: 336

Caption:
Figure 8.1(b): (i) The Mean field strength across the entire surface scanned for each of 336 frames (in black) and the voltage applied to the Square Planar Coil (in red). (ii) The percentage area coverage of each greyscale level across the entire scan for each of 336 frames. The stray field (Hz) strength is represented in greyscale from -300 to 300 A/m.
Histogram Analysis Bar.ods
Mean Analysis.ods

\Figure 8.2\

Caption:
Figure 8.2(a): Filmstrip representation of a dynamic scan of Laser Etched Coated 3% Si Grain-Oriented Steel energised at 3kHz with the Large Yoke. The full animated GIF is provided in Chapter 8.7z of the Cardiff Portal Arxive (page ix). The stray field strength (Hz) is represented in greyscale from -500 to 500 A/m. The border 20 pixels of each frame presents the oscillating voltage driving the C-Yoke( ± 0.15 V).
LS Laser Etched Steel [D].zip
Originally scanned with: SC3 with Lakeshore Sensor
original file:
\2018\15 LS Scan of Laser GOES\AC Field [Dynamic] synced 190718.zip
pixel dimensions:
270x250 @400steps/pixel
sample dimensions:
27 mm x 25 mm @ 0.1mm/pixel
samples/frequency: 1000,1000
Energised with: Yoke @ 3kHz
Source Ranges:
1 RC20a -10 10 x not used
2 RC20b -10 10 x not used
3 TMR -4.98 4.97 Lakeshore (-498 to 497 A/m)
4 Yoke -0.115 0.151 Yoke coil
Number of Frames for one complete cycle: 336
Caption:
Figure 8.2(b): (i) The Mean field strength across the entire surface scanned for each of 336 frames (in black) and the voltage applied to the Large Yoke (in red). (ii) The percentage area coverage of each greyscale level across the entire scan for each of 336 frames. The stray field (Hz) strength is represented in greyscale from -500 to 500 A/m.
Histogram Analysis Bar.ods
Mean Analysis.ods

\Figure 8.3\

Caption:
Figure 8.3(a): Filmstrip representation of a dynamic scan of As-cast 2605 Co IPF895 Metglas Alloy Amorphous Ribbon energised at 3kHz with the Large Yoke. The full animated GIF is provided in Chapter 8.7z of the Cardiff Portal Arxive (page ix). The stray field strength (Hz) is represented in greyscale from -500 to 500 A/m. The border 20 pixels of each frame presents the oscillating voltage driving the C-Yoke( ± 0.2 V).
LS Amorphous Ribbon [D].zip
Originally scanned with: SC3
original file:
\2018\16 LS Scan of Amorphous Ribbon\Amorphous 090818 sync [D].zip
pixel dimensions:
200x200 @400steps/pixel
sample dimensions:
20 mm x 20 mm @ 0.1mm/pixel
samples/frequency: 1000,1000
Energised with: Yoke @ 3kHz
Source Ranges:
1 RC20a -10 10 x unused
2 RC20b -10 10 x unused
3 Lakeshore -5 4.98 Lakeshore
4 Yoke -0.2 0.213 Yoke
Number of Frames for one complete cycle: 336
Caption:
Figure 8.3(b): (i) The Mean field strength across the entire surface scanned for each of 336 frames (in black) and the voltage applied to the Large Yoke (in red). (ii) The percentage area coverage of each greyscale level across the entire scan for each of 336 frames. The stray field (Hz) strength is represented in greyscale from -500 to 500 A/m.
Histogram Analysis Bar.ods
Mean Analysis.ods

\Figure 8.4\

Caption:
Figure 8.4(a): Filmstrip representation of a dynamic scan of Uncoated 3% Si Grain-Oriented Steel subjected to a 3kHz oscillating x-axis field of ± 1 kA/m from the 20 + 20 coils. The full animated GIF is provided in Chapter 8.7z (page ix). The border 20 pixels of each frame presents the oscillating Applied field (inverted greyscale).
LS Coated ES 2020 Coils [D].zip
Originally scanned with: SC3 and Lakeshore Sensor
original file:
\2018\25 2020 Larger Area\3Hz 2000 Samples synced 201018 [D].zip
pixel dimensions:
280x200 @400steps/pixel
sample dimensions:
28 mm x 20 mm @ 0.1mm/pixel
samples/frequency: 2000,1000
Energised with: 20 + 20 Coils @ 3Hz
Source Ranges:
1 RC20a -10 10 x unused
2 RC20b -10 10 x unused
3 Lakeshore -0.253 0.186 Lakeshore (-253 to 186 A/m)
4 Yoke -1.21 1.15 20 + 20 Coils
Number of Frames for one complete cycle: 336
Caption:
Figure 8.4(b): (i) The Mean stray field strength across the entire surface for each of 336 frames (in black) and the Applied x-axis field strength (in red). (ii) The percentage area coverage of each greyscale level across the entire scan for each of 336 frames. (iii) The Mean Stray field strength plotted against the Applied x-axis field strength.
Histogram Analysis Bar.ods
Mean Analysis.ods

\Figure 8.5\

Caption:
Figure 8.5(a): Filmstrip representation of a 10 x 10 mm2 (@0.05mm/pixel) dynamic scan of Coated 3% Si Grain-Oriented Steel subjected to a 3kHz oscillating x-axis field of ± 1.95 kA/m from the 50 + 50 coils. The stray field strength (Hz) is represented in greyscale ± 300 A/m. The full animated GIF is provided in Chapter 8.7z (page ix). The border 20 pixels of each frame presents the oscillating Applied field (inverted greyscale).
TMR Coated ES 5050 Coils [D].zip
Originally scanned with: SC3 with STJ-020
original file:
\2019\07 NEW TMR SENSOR\200x200 (200)\200x200 (200) dynamic 230519 sync [D].zip
pixel dimensions:
200x200 @200steps/pixel
sample dimensions:
10 mm x 10 mm @ 0.05mm/pixel
samples/frequency: 1000,1000
Energised with: 50 + 50 Coils @ 3kHz
Source Ranges:
1 PickupC -0.012 0.014 50 coils pickup
2 Zero -10 10 x unused
3 STJ-020 -2.25 2.76 STJ-020
4 DriverCs -0.939 0.893 50 + 50 Coils
Number of Frames for one complete cycle: 336
Caption:
Figure 8.5(b): (i) The Mean stray field strength across the entire surface for each of 336 frames (in black) and the Applied x-axis field strength (in red). (ii) The percentage area coverage of each greyscale level across the entire scan for each of 336 frames. (iii) The Mean Stray field strength plotted against the Applied x-axis field strength.
Histogram Analysis Bar.ods
Mean Analysis.ods

\Figure 8.6\

Caption:
Figure 8.6(a): Filmstrip representation of a 2 x 2 mm2 (@0.01mm/pixel) dynamic scan of Coated 3% Si Grain-Oriented Steel, a subregion of Figure 8.5(a) as indicated in the top left frame. The stray field strength (Hz) is represented in greyscale ± 300 A/m. The full animated GIF is provided in Chapter 8.7z (page ix). The border 20 pixels of each frame presents the oscillating Applied field (inverted greyscale).
TMR Coated ES CUa [D].zip
Originally scanned with: SC3 with STJ-020
original file:
\2019\07 NEW TMR SENSOR\200x200 (40)a\200x200 (40)a 230519 sync [D].zip
pixel dimensions:
200x200 @40steps/pixel
sample dimensions:
2 mm x 2 mm @ 0.01mm/pixel
samples/frequency: 1000,1000
Energised with: 50 + 50 Coils @ 3kHz
Source Ranges:
1 PickupC -0.012 0.014 50 turn Pickup coil
2 Zero -10 10 x unused
3 STJ-020 -1.09 0.783 STJ-020 sensor
4 DriverCs -0.928 0.881 50 + 50 Coils
Number of Frames for one complete cycle: 336
Caption:
Figure 8.6(b): (i) The Mean stray field strength across the entire surface for each of 336 frames (in black) and the Applied x-axis field strength (in red). (ii) The percentage area coverage of each greyscale level across the entire scan for each of 336 frames. (iii) The Mean Stray field strength plotted against the Applied x-axis field strength.
Histogram Analysis Bar.ods
Mean Analysis.ods

\Figure 8.7\

Caption:
Figure 8.7(a): Filmstrip representation of a 2 x 2 mm2 (@0.01mm/pixel) dynamic scan of Coated 3% Si Grain-Oriented Steel, a subregion of Figure 8.5(a) as indicated in the top left frame. The stray field strength (Hz) is represented in greyscale ± 300 A/m. The full animated GIF is provided in Chapter 8.7z (page ix). The border 20 pixels of each frame presents the oscillating Applied field (inverted greyscale).
TMR Coated ES CUb [D].zip
Originally scanned with: SC3 and STJ-020 sensor
original file:
\2019\07 NEW TMR SENSOR\200x200 (40)b\200x200 (40)b sync 040719 [D].zip
pixel dimensions:
200x200 @40steps/pixel
sample dimensions:
2 mm x 2 mm @ 0.01mm/pixel
samples/frequency: 1000,1000
Energised with: 50 + 50 Coils @ 3kHz
Source Ranges:
1 PickupC -0.011 to 0.013 50 turn Pickup Coil
2 Zero -10 to 10 x unused
3 STJ-020 -1.36 to 0.914 STJ-020 sensor
4 DriverCs -0.914 to 0.859 50 + 50 Coils
Number of Frames for one complete cycle: 336
Caption:
Figure 8.7(b): (i) The Mean stray field strength across the entire surface for each of 336 frames (in black) and the Applied x-axis field strength (in red). (ii) The percentage area coverage of each greyscale level across the entire scan for each of 336 frames. (iii) The Mean Stray field strength plotted against the Applied x-axis field strength.
Histogram Analysis Bar.ods
Mean Analysis.ods

\Figure 8.8\

Caption:
Figure 8.8: Filmstrip representation of the 10 x 10 x 0.1 mm3 dynamic scan of Coated 3% Si Grain-Oriented Steel subjected to a 3kHz oscillating x-axis field(@ 0.1 x 0.1 x 0.05 mm3/pixel). The full animation is provided in Chapter 8.7z (page ix). The colour representation of the H stray field vector is provided. The Hz component ranges in magnitude ±350 A/m. The Hx component ranges in magnitude ±530 A/m. The background of each frame represents the Applied field (±1.95 kA/m, inverted greyscale).
0deg Volume Dynamic [D].zip
Originally scanned with: SC3 and STJ-020 sensor Vertical (0deg)
original file:
\2019\10 ES Volume Dynamic\0deg Volume Dynamic sync 050719 [D].zip
pixel dimensions:
100x100x10 @400x400x200 steps/pixel
sample dimensions:
10 mm x 10 mm x 0.1 mm @ 0.1 x 0.1 x 0.05 mm/pixel
samples/frequency: 1000,1000
Energised with: 50 + 50 Coils @ 3kHz
Source Ranges:
1 PickupC -0.011 to 0.013 50 turn Pickup Coil
2 Zero -10 to 10 x unused
3 STJ-020 -1.26 to 1.07 STJ-020 sensor (-385.5 to 327.4 A/m)
4 DriverCs -0.901 to 0.856 50 + 50 Coils
Number of Frames for one complete cycle: 336
45deg Volume Dynamic [D].zip
Originally scanned with: SC3 and STJ-020 sensor 45 deg CCW from vertical (45deg)
original file:
\2019\10 ES Volume Dynamic\45deg Volume Dynamic sync 260619 [D].zip
pixel dimensions:
100x100x10 @400x400x200 steps/pixel
sample dimensions:
10 mm x 10 mm x 0.1 mm @ 0.1 x 0.1 x 0.05 mm/pixel
samples/frequency: 1000,1000
Energised with: 50 + 50 Coils @ 3kHz
Source Ranges:
1 PickupC -0.011 to 0.013 50 turn Pickup Coil
2 Zero -10 to 10 x unused
3 STJ-020 -0.733 to 0.778 STJ-020 sensor (224.2 to 238.0 A/m)
4 DriverCs -0.903 to 0.84 50 + 50 Coils
Number of Frames for one complete cycle: 336
zx Combine [D].zip
processed combination of STJ-020 source from 0deg and 45deg Volume Dynamic scans
pixel dimensions:
100x100x10 @400x400x200 steps/pixel
sample dimensions:
10 mm x 10 mm x 0.1 mm @ 0.1 x 0.1 x 0.05 mm/pixel
samples/frequency: 1000,1000
Source Ranges:
1 0deg -1.26 to 1.07 original 0deg Volume Dynamic STJ-020 (-385.5 to 327.4 A/m)
2 45degCCW -7.333 to 0.778 original 45deg Volume Dynamic STJ-020 (224.2 to 238.0 A/m)
3 calcZ -1.26 to 1.07 calculated Z component (-385.5 to 327,4 A/m)
4 calcX -1.75 to 1.69 calculated X component (-535.5 to 517.1 A/m)
Number of Frames for one complete cycle: 336

\Data Archive\Publications.7z

Summary

Appendix 6 - Publications

During this research three posters have been presented at conference, one conference proceedings paper, one short journal paper and one long journal paper have been published, each demonstrating novel peer reviewed research.

7z Arxive Contents

catalogue.csv

basic comma separated version of the catalogue of files and their descriptions

catalogue.ods

Open Document Spreadsheet version of the catalogue of files and their descriptions

dir.txt

full directory of files

Gregynog 2016 Poster.pdf

Poster: Gibbs R., June 2016, “Imaging Stray Magnetic Fields Using 3D Scanning Techniques Part1: Development of the Scanner”, Gregynog 2016, Cardiff School of Engineering PGR Research Conference, Wales

IEEE Sensors 2017 Poster.pdf

Poster: Gibbs R., Meydan T. & Williams P., October 2017, “Investigating Stray Magnetic Field Structure in the Surface Boundary Layer”, IEEE Sensors 2017, IEEE Sensors Conference, SEC, Glasgow, Scotland

IEEE SENSORS 2017 Proceedings.pdf

Paper: Gibbs R., Meydan T. & Williams P., 2017, “Volumetrically scanning the structure of stray-fields above grain-oriented electrical-steel using a variably angled TMR sensor”, Proc. IEEE Sensors, 1, pp. 1–3. DOI: 10.1109/ICSENS.2017.8234136

ISEM 2017 Short Paper.pdf

Paper: Gibbs R., Meydan T. & Williams P., 2017, “Investigating the three-dimensional structure of stray fields in the boundary layer at micron scale using angled volumetric scanning”, ISEM 2017 18th Int. Symp. Appl. Electromagn. Mech., 1, pp. 5–6.

MDPI Sensors 18(4) Full Paper.pdf

Paper: Gibbs R., Moreton G., Meydan T. & Williams P., 2018, “Comparison between modelled and measured magnetic field scans of different planar coil topologies for stress sensor applications”, MDPI Sensors, 18(4), pp. 1–11. DOI: 10.3390/s18040931

SMM 2017 Poster.pdf

Poster: Gibbs R., Meydan T. & Williams P., May 2017, “Investigation Stray Magnetic Field Structure in the Surface Boundary Layer”, SMM 2017, 23rd Soft Magnetic Materials Conference, Seville, Spain

\Instructional Video\

Summary

A video demonstration of how to perform scans with the Scanner Control (Version 3) software. The video is best watched alongside the text based instructions provided in Chapter 5 of the Thesis and reproduced here as Scanner Control Instructions.pdf. The Examples Files.7z archive provides all the data files produced and used during the demonstration video. These files are also reproduced within the \Data Arxive\Chapter 5.7z arxive (page 11).

\Instructional Video\

Scanner Control Instructions.pdf - Text based guide to the use of the Scanner and the SCANNER CONTROL 3 software Scanner Control Instructional Video.mov - Video based guide to the use of the Scanner and the SCANNER CONTROL 3 software

\Instructional Video\Example Files\

Example files created during the Instructional Video and the text based guide