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Hi Carlos and Julie,</div>
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One more thing.<br>
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Would adding additional shielding around the mainframe be a solution?</div>
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Or should we swap in the spare mainframe if we think the current one is too damaged?</div>
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Best,</div>
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Aaron<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dsg-hallc_nps <dsg-hallc_nps-bounces@jlab.org> on behalf of Aaron Brown via Dsg-hallc_nps <dsg-hallc_nps@jlab.org><br>
<b>Sent:</b> Tuesday, November 21, 2023 10:11 AM<br>
<b>To:</b> Carlos Munoz Camacho <munoz@jlab.org>; Julie Roche <jroche@jlab.org><br>
<b>Cc:</b> yaopeng <yaopeng@jlab.org>; Dsg-hallc_nps@jlab.org <dsg-hallc_nps@jlab.org><br>
<b>Subject:</b> Re: [Dsg-hallc_nps] NPS temperature reading jumps</font>
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Hi Julie and Carlos,</div>
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If rebooting the mainframe is the solution we would like to move forward with, I can try writing some code to do so every 2 or 3 days. However, when we reboot the mainframe we also have to restart the LabVIEW program, so I'll need to figure out if there is
a way to do this automatically. I'll discuss it with my team and get back to you.</div>
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Best,</div>
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Aaron<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Carlos Munoz Camacho <munoz@jlab.org><br>
<b>Sent:</b> Tuesday, November 21, 2023 3:14 AM<br>
<b>To:</b> Julie Roche <jroche@jlab.org><br>
<b>Cc:</b> Aaron Brown <ambrown@jlab.org>; yaopeng <yaopeng@jlab.org><br>
<b>Subject:</b> Re: NPS temperature reading jumps</font>
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<div dir="ltr">Hi Julie, all,
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<div> my assumption (initially suggested by D. Mack) is that this is due to radiation causing some bit flips in the ADC readout. It seems that rebooting the mainframe resets things, so it would be good to do it after this happens to confirm. Also, to prevent
this from happening in the future, it may be a good practice to reboot the mainframe periodically (every 2-3 days?).</div>
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<div>Best,</div>
<div>Carlos</div>
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<div dir="ltr" class="x_x_gmail_attr">On Tue, Nov 21, 2023 at 2:50 AM Julie Roche <<a href="mailto:jroche@jlab.org">jroche@jlab.org</a>> wrote:<br>
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<p class="x_x_MsoNormal"><span style="font-size:11pt">Hi Aaron<u></u><u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt">Tonight, I’m staring at the temperature readings for the NPS calorimeter. There are the unphysical jumps that Carlos mentioned to me (and possibly to you) a few days ago. Like in this entry:
<a href="https://logbooks.jlab.org/entry/4223498" target="_blank">https://logbooks.jlab.org/entry/4223498</a><u></u><u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt">What is that due to? Could it be that your readings are slipping? By this, I mean, it seems that when there is a sudden jump, color lines get switched. For example, in the picture below at 2023-11-20 at
9 am, it looks to me that the pink becomes light green, the light green becomes dark green, and the dark green becomes blue. <u></u><u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt">Julie<u></u><u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="x_x_MsoNormal"><span style="font-size:11pt">matches an old color<img border="0" width="643" height="370" id="x_x_m_-290314348706335037Picture_x0020_1" alt="A screenshot of a graph
Description automatically generated" style="width:6.6979in; height:3.8541in" data-outlook-trace="F:2|T:2" src="cid:ii_18bf0ef69224cff311"><u></u><u></u></span></p>
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