[d2n-analysis-talk] end of run HV map

[posik at jlab.org]

Hi Brad,

  I was looking at the end of run files to get the high voltage settings
for the big bite cerenkov and the HV map looks like this:

# Map  BB_CER  Measured Voltage
  1 :   1441   1522
  2 :   1430   1749
  3 :    941   1469
  4 :   1250   1554
  5 :   1152   1371
  6 :   1165   2070
  7 :   1430   1820
  8 :   1162   1451
  9 :    800   1502
 10 :   1290   1657

I would think that left side HV values are for pmt 1-10, with pmt 1 being
the upper left and pmt 10 being the lower left. Similarly pmt 11 would be
the HV value at the upper right and pmt 20 would be the lower right HV.
But I came across a time where the base on pmt 12 was replaced which would
change the high voltage of pmt 12 and the HV value that switched was the
1502 value making that correspond to pmt 12. So am I correct in assuming
the following HV to PMT map in the end of run files:

 13 :   -514
# Map  BB_CER  Measured Voltage
  1 :   pmt 10  pmt 20
  2 :   pmt 9   pmt 19
  3 :   pmt 8   pmt 18
  4 :   pmt 7   pmt 17
  5 :   pmt 6   pmt 16
  6 :   pmt 5   pmt 15
  7 :   pmt 4   pmt 14
  8 :   pmt 3   pmt 13
  9 :   pmt 2   pmt 12
 10 :   pmt 1   pmt 11

Thanks
matt