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Thanks Nilanga,</div>
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Zeke and I will do that before we start the next run. </div>
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Best regards,</div>
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David </div>
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David Flay, Ph. D.</div>
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Hall A/C Staff Scientist</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Liyanage, Nilanga K (nl8n) <nl8n@virginia.edu><br>
<b>Sent:</b> Monday, December 6, 2021 3:37 PM<br>
<b>To:</b> David Flay <flay@jlab.org>; sbs_gems@jlab.org <sbs_gems@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: [Sbs_gems] [New Logentry] Brief Voltage Spike on uva_xygem_2</font>
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Hmmm, that is a bit worrying.</div>
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I think, until we understand this a bit more, we should back down the HV on just this one module by 50 V.</div>
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I expect the reduction of efficiency to be very small because of this change. So I think we should do this soon.</div>
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Best</div>
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Nilanga</div>
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<font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Sbs_gems <sbs_gems-bounces@jlab.org> on behalf of flay@jlab.org <flay@jlab.org><br>
<b>Sent:</b> Monday, December 6, 2021 3:20 PM<br>
<b>To:</b> sbs_gems@jlab.org <sbs_gems@jlab.org><br>
<b>Subject:</b> [Sbs_gems] [New Logentry] Brief Voltage Spike on uva_xygem_2</font>
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<h1 class="x_x_node-title" style="font-size:1.6em"><a href="https://logbooks.jlab.org/entry/3957495" rel="bookmark" style="text-decoration:none">Brief Voltage Spike on uva_xygem_2
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<li><a href="https://logbooks.jlab.org/entry/3957495/edit?destination=email/send" style="text-decoration:none">Edit</a></li><li><a href="https://logbooks.jlab.org/entry/3957495/delete?destination=email/send" style="text-decoration:none">Delete</a></li></ul>
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Lognumber <a href="https://logbooks.jlab.org/entry/3957495" class="x_x_lognumber" style="text-decoration:none">
3957495</a>. Submitted by <a href="https://logbooks.jlab.org/user/flay" style="text-decoration:none">
flay</a> on <time datetime="2021-12-06T15:17:32-0500"><a href="https://logbooks.jlab.org/entries?start_date=1638818252&end_date=1638825452&book=HALOG" style="text-decoration:none">Mon, 12/06/2021 - 15:17</a></time>.
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<p>Just catching up on this after the DAQ has settled back in and the HCAL HV was power cycled.
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<p>At around 13:50 we had a HV spike on uva_xygem_2, see attached.</p>
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