[Sbs_gems] [EXTERNAL] UV GEM HV Settings

[Sean Jeffas]

Hi Kondo and Nilanga,

After we changed the resistor on UV GEM layer 0 back in October Kondo
recommended to lower the HV a bit to monitor the GEM HV. Here is the
logbook reference https://logbooks.jlab.org/entry/3930480. However we
discovered this week that the voltage has never been returned to 3697 V
since then, and we ran all this week at 3653 V. From Kondo's log it is my
impression that he meant to only set it to 3653 V for a few hours. Is it ok
to change to 3697 V at this point? Also with the two other UV GEMs in BB we
also have these new dividers. Then ran all night at 3653 V with cosmics
with no issues. Can we set those to 3697 V as well?

Best,
Sean
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