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Hello,</div>
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Since it has been about a month, I reviewed the data for the RICH aerogel dryboxes. Attached are three plots: all raw data from the archiver, a plot of the average drybox humidity by day, and a plot of the average drybox temperature by day.</div>
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As you can see in the data, on July 25, the humidity in Drybox 2 rose to ~54% RH. The humidity has since returned to a normal value. The cause of the spike is unknown, but since Drybox 2 is the only one showing the rise, it could be that the drybox itself had
a internal problem that it recovered from.</div>
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We'll continue monitoring the dryboxes in the upcoming weeks to see if there is another rise.</div>
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Also, just a reminder, anyone can view the drybox data through EPICS.</div>
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The data is in the archiver under the PVs below.</div>
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B_DET_RICH_DRYBOX_1_HUM</div>
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B_DET_RICH_DRYBOX_2_HUM</div>
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B_DET_RICH_DRYBOX_3_HUM</div>
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B_DET_RICH_DRYBOX_1_TEMP</div>
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B_DET_RICH_DRYBOX_2_TEMP</div>
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B_DET_RICH_DRYBOX_3_TEMP</div>
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There is also a CSS screen in <i>clascss </i>accessible through the RICH overview menu under Hardware Interlocks. This screen requires two-factor login to a Hall B Linux server.<br>
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Additionally, there is a WEDM version of the drybox monitoring screen in JLab's EPICSWEB. This screen is available from a web browser with a JLab CUE login. A link to the screen is below.</div>
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<a href="https://epicsweb.jlab.org/wedm/screen?edl=%2fcs%2fopshome%2fedm%2fdsg%2fRICH-drybox.edl" id="LPlnk319577">https://epicsweb.jlab.org/wedm/screen?edl=%2fcs%2fopshome%2fedm%2fdsg%2fRICH-drybox.edl</a><br>
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Best regards,</div>
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Tyler<br>
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