Posted by Glen Marshall, 18 June 2002
http://midtwist.triumf.ca:8081/EL/020618.22084?exp=twist

HV has been turned on to the scintillators as follows:

PMT		HV4032 channel		Voltage

M1		00			1600
M2		01			1550

PU11		02			1600
PU12		03			1600
PU21		04			1600
PU22		05			1500

DS1		08			2150
DS2		09			1950
DS3		10			1900

These numbers correspond to settings in the paper log book #4, pages 7 and
8, and should reproduce the results found then, but signals were _not_
checked any further.

Part of a related post by Blair, Glen, and Dave, 4 July 2002
http://midtwist.triumf.ca:8081/EL/020704.510?exp=twist
(I've removed the DS scintillator info, since it was updated later.)

We have connected the scintillator and HV cables (we think the same way as
before).  Here are the connections:

PMT       HV Cable  Sig Cable       HV4032 channel          Voltage

  M1      PMTHV0    PMT 1             00                      1600
  M2      PMTHV1    PMT 2             01                      1550

  PU11    PMTHV2    PMT 3             02                      1600
  PU12    PMTHV3    PMT 4             03                      1600
  PU21    PMTHV4    PMT 5             04                      1600
  PU22    PMTHV5    PMT 6             05                      1500

  DS1     25132     25110             08                      2150
  DS2     25133     25111             09                      1950
  DS3     25134     25113             10                      1900

===

Post from Andrei, 22 August 2002:
http://midtwist.triumf.ca:8081/EL/020822.7835?exp=twist

  Dave, Yuri and me have set up the "magnet safe" downstream
  scintillator package. 

  PMT          HV cable   HV ch   Signal cable -> Patch panel

  1.1.1        25133      8       25110           PMT07
  1.1.2        25134      9       25111           PMT08
  1.2.1        25135      10      25113           PMT09
  1.2.2        25136      11      25114           PMT10

  HV settings: ch 8       1600V
               ch 9       1600V
               ch 10      1600V
               ch 11      1550V


  The trigger logic: 

  A linear sum is made of the 2 signals coming from one scintillator,
  the result is fed into a discriminator (former DS1 and DS2).  The
  threshold is set to 30mV for both DS1 and DS2.  The DS1 and DS2
  signals are input into the D coincidence unit (former triple
  coincidence DS1*DS2*DS3). The DS3 is not used any more.

  The D output goes into the prescaler etc as it was before.