https://wiki.jlab.org/ciswiki/index.php?title=September_18,_2020_Meeting_Minutes&feed=atom&action=history
September 18, 2020 Meeting Minutes - Revision history
2024-03-28T08:57:23Z
Revision history for this page on the wiki
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https://wiki.jlab.org/ciswiki/index.php?title=September_18,_2020_Meeting_Minutes&diff=21238&oldid=prev
Yoskowij at 18:46, 20 September 2020
2020-09-20T18:46:26Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 18:46, 20 September 2020</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>==Post-meeting notes==</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>==Post-meeting notes==</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">To </del>be <del class="diffchange diffchange-inline">added</del>...</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">Need to do a "backwards" calculation to reproduce the measured radiation signal. That is, electron beam creates ions, which impact the PC and produce SEY, which hit the gun chamber/beam pipe and produce radiation -- for a given electron beam current, what is the radiation rate?</ins></div></td></tr>
<tr><td colspan="2"> </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">* PIXE X-rays from Gallium and Arsenic, while they exist, cannot penetrate the thickness of the gun chamber and beam pipe and thus, cannot </ins>be <ins class="diffchange diffchange-inline">detected by the radiation monitors...or at least it is extremely unlikely that they will.</ins></div></td></tr>
<tr><td colspan="2"> </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">* Carlos presented a plot of the gamma ray sensitivity of the radiation monitors - need a graph of counts per second vs gamma-ray (or X-ray) energy.</ins></div></td></tr>
<tr><td colspan="2"> </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">* Cristhian presented IBSimu simulations of an SEY beam. For 1-to-1 SEY, some secondary electrons hit the anode, bounce back to the cathode, then to the gun chamber, etc</ins>. <ins class="diffchange diffchange-inline">This suggests that, while this form of "containment" of secondary electrons in the gun chamber is rare and short lived and the real SEY is below 1, it may become important: even if the probability of a "contained" SEY is 0</ins>.<ins class="diffchange diffchange-inline">01%, a primary beam of billions of electrons could still create thousands of contained SEY</ins>.</div></td></tr>
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Yoskowij
https://wiki.jlab.org/ciswiki/index.php?title=September_18,_2020_Meeting_Minutes&diff=21218&oldid=prev
Yoskowij: Created page with "==Post-meeting notes== *To be added... Return to Ionization Effects Meetings Go to Meeting Page"
2020-09-16T15:43:33Z
<p>Created page with "==Post-meeting notes== *To be added... <a href="/ciswiki/index.php/Ionization_Effects_Meetings" title="Ionization Effects Meetings"> Return to Ionization Effects Meetings</a> <a href="/ciswiki/index.php/Weekly_phone_call_-_September_18,_2020" title="Weekly phone call - September 18, 2020"> Go to Meeting Page</a>"</p>
<p><b>New page</b></p><div>==Post-meeting notes==<br />
*To be added...<br />
<br />
<br />
[[Ionization Effects Meetings | Return to Ionization Effects Meetings]]<br />
<br />
[[Weekly phone call - September 18, 2020 | Go to Meeting Page]]</div>
Yoskowij