[Sbs_gems] [EXTERNAL] Problems with J0 Mid

[Ezekiel Wertz]

Hi Folks,

I was alerted by the shift crew to a problem with J0 Middle. At the moment
we are not entirely sure what has occurred, but the HV demonstrated some
problems and the efficiency of the module has become greatly reduced. See
the following log entries.

https://logbooks.jlab.org/entry/3955216
https://logbooks.jlab.org/entry/3955221
https://logbooks.jlab.org/entry/3955220

Also see the 50k replay plot for J0 mid on page 24
https://logbooks.jlab.org/files/2021/12/3955238/summaryPlots_12496_bb_gem_for_shiftcrew.pdf

Currently we suspect either a foil collapse or new shorted sectors in this
module. But we are uncertain of the actual cause which is why I am
contacting all of you. I have instructed shift crew to turn off J0 middle
HV until further notice


Ezekiel
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/sbs_gems/attachments/20211202/b2e04c24/attachment-0001.html>