[Dsg-rich] RICH calibration runs

[Marco Mirazita]

Hi all,
today I took a new set of RICH calibration data.
Please have a look at https://logbooks.jlab.org/entry/3582208.
The data look ok, consistent with April 30 (data taken on May 5 were a 
bit more noisy).

This is the list of runs:
1) HV off, gain=1
2) HV off, gain=EQ_ALL
3) HV=1000, gain=EQ_ALL
4) HV=1000, gain=EQ_ALL_7 (like EQ_ALL, but with 7 hot channels killed)
5) HV=1000, gain=EQ_ALL_7_65 (like EQ_ALL_7, but with 65 large pedestal 
channels with gain decreased by 2/3)

Now the RICH is with LV on, HV=1000V, gain map back to EQ_ALL.
Marco