https://wiki.jlab.org/ciswiki/index.php?title=October_27,_2020_-_Magnetic_field_mapping_and_characterization_meeting&feed=atom&action=history
October 27, 2020 - Magnetic field mapping and characterization meeting - Revision history
2024-03-29T02:17:50Z
Revision history for this page on the wiki
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https://wiki.jlab.org/ciswiki/index.php?title=October_27,_2020_-_Magnetic_field_mapping_and_characterization_meeting&diff=21790&oldid=prev
Chgarcia at 19:20, 27 October 2020
2020-10-27T19:20:06Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 19:20, 27 October 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l7" >Line 7:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> * Software will provide EPICS controls and hysteresis ramp loops</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> * Software will provide EPICS controls and hysteresis ramp loops</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> * Label and wire coil leads to ensure positive current produces positive B field per convention</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> * Label and wire coil leads to ensure positive current produces positive B field per convention</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> * <del class="diffchange diffchange-inline">PS </del>limits <del class="diffchange diffchange-inline">for Hysteresis curve</del>: <del class="diffchange diffchange-inline">20A at 1A/s, but measurements done at </del>+/- 19.9A</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> * <ins class="diffchange diffchange-inline">Hysteresis </ins>limits: +/- 19.9A</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Field mapping:'''</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Field mapping:'''</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l19" >Line 19:</td>
<td colspan="2" class="diff-lineno">Line 19:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''CED field map'''</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''CED field map'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> * <del class="diffchange diffchange-inline">EPICS hysteresis cycle ending at +19.9 A. </del>Measure B<del class="diffchange diffchange-inline">(</del>I<del class="diffchange diffchange-inline">) </del>at center of magnet <del class="diffchange diffchange-inline">at 19.9A, then decrement by 0.9A to 19A, then 1 A increments until -19 A reached. Final reading -19.9A. All without further hysteresis loops. Finally, set to zero A and </del>EPICS hysteresis cycle. </div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> * Measure B <ins class="diffchange diffchange-inline">vs. </ins>I <ins class="diffchange diffchange-inline"> </ins>at center of magnet <ins class="diffchange diffchange-inline">using the </ins>EPICS hysteresis cycle <ins class="diffchange diffchange-inline">at the beginning then top down through currents</ins>. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Other measurements:'''</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Other measurements:'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> * V vs I resistance and inductance.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div> * V vs I resistance and inductance.</div></td></tr>
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Chgarcia
https://wiki.jlab.org/ciswiki/index.php?title=October_27,_2020_-_Magnetic_field_mapping_and_characterization_meeting&diff=21786&oldid=prev
Chgarcia: Created page with "*Media:Magnetic field mapping meeting Oct 27 2020.pptx '''Hardware:''' * Use new SCE 20A/75V PS for measurements. This is the same type of PS that will be used for o..."
2020-10-27T16:39:48Z
<p>Created page with "*<a href="/ciswiki/images/a/ab/Magnetic_field_mapping_meeting_Oct_27_2020.pptx" class="internal" title="Magnetic field mapping meeting Oct 27 2020.pptx">Media:Magnetic field mapping meeting Oct 27 2020.pptx</a> '''Hardware:''' * Use new SCE 20A/75V PS for measurements. This is the same type of PS that will be used for o..."</p>
<p><b>New page</b></p><div>*[[Media:Magnetic field mapping meeting Oct 27 2020.pptx]]<br />
<br />
'''Hardware:'''<br />
<br />
* Use new SCE 20A/75V PS for measurements. This is the same type of PS that will be used for oparations<br />
* DC power will install new SCE PS in magnet test ~10/29/20<br />
* Software will provide EPICS controls and hysteresis ramp loops<br />
* Label and wire coil leads to ensure positive current produces positive B field per convention<br />
* PS limits for Hysteresis curve: 20A at 1A/s, but measurements done at +/- 19.9A<br />
<br />
'''Field mapping:'''<br />
<br />
* Hall probe step size 2 mm<br />
* On axis values z=[-25,25] cm<br />
* Background: measure z=[-30,30] cm. First run the probe in this range w/o the magnet. Then place the magnet for measurements and do a full map at 0 A after hysteresis at 0A . Finally subtract from each value.<br />
* Off axis values: limited by 15 mm diameter nickel endplates hole and 6 mm square hall probe. Measure z=[-25,25] cm once at 18A and as far as these limitations allow in +X,-X,+Y,-Y and record X,Y positions for comparing with models.<br />
* Measure at +/-19.9A, +/- 15A, +/- 10A, +/-5A and 0A.<br />
<br />
'''CED field map'''<br />
<br />
* EPICS hysteresis cycle ending at +19.9 A. Measure B(I) at center of magnet at 19.9A, then decrement by 0.9A to 19A, then 1 A increments until -19 A reached. Final reading -19.9A. All without further hysteresis loops. Finally, set to zero A and EPICS hysteresis cycle. <br />
<br />
'''Other measurements:'''<br />
<br />
* V vs I resistance and inductance.</div>
Chgarcia