Gain Adjustments

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Revision as of 11:56, 4 November 2011 by Kmoriya (Talk | contribs) (main detector)

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Gains for each PMT/base combination to be used for the beamtest have been tested. Our method was to place two triggers on top of each other, and count the coincidence rate of cosmic rays as we vary the HV on the trigger we want to test. The other trigger was kept at 1700 V. Below are plots for the gain adjustments. There are 10 trigger scintillators, and 1 remote trigger.

The gains were fit with a "turnon function", the same we use for the PMT tests, and the central value of the turnon curve (V0) was obtained. The nominal HV values for each PMT/base combination is V0+100 [V].

Figure of Gains

  • Triggers:
ID:0x72360e
ID:0x72c932
ID:0x733d10
ID:0x738516
ID:0x72579b
ID:0x72dacc
ID:0x738545
ID:0x72bb3f
ID:0x732c79
ID:0x733e06


  • Remote Trigger:
remote trigger


Table of Gains

triggers

position base ID V0 V0+100
H1 0x732c79 1421.96 1521.96
H2 0x72c932 1413.45 1513.45
H3 0x72360e 1446.51 1546.51
H4 0x738545 1493.05 1593.05
H5 0x733d10 1483.08 1583.08
V1 0x733e06 1451.23 1551.23
V2 0x72dacc 1477.14 1577.14
V3 0x72bb3f 1365.49 1465.49
V4 0x72579b 1442.73 1542.73
V5 0x738516 1436.49 1536.49
remote 1489.09 1589.09

main detector

These values were measured with the PMT tester, so there should be a strong correlation between the numbers shown here and the set HV, but they are not exactly the same.

position base ID PMT ID V0 V0+100
row 1 column 1 (bottom left) 0x72e92e 01583 1452.22 1552.22
row 1 column 2 0x72a530 02379 1441.39 1541.39
row 1 column 3 0x72db49 02720 1453.12 1553.12
row 1 column 4 0x7256d9 6169 1463.52 11563.52
row 1 column 5 (bottom right) 0x72a5c2 8699 1392.01 1492.01
row 2 column 1 0x72361d 4396 1470.59 1570.59
row 2 column 2 0x7256ae 01899 1483.08 1583.08
row 2 column 3 0x72355b 6471 1416.38 1516.38
row 2 column 4 0x7349b1 2489 1481.55 1581.55
row 2 column 5 0x72bb50 00495 1467.04 1567.04
row 3 column 1 0x72c9e2 8533 1470.9 1570.9
row 3 column 2 0x738553 3709 1361.84 1461.84
row 3 column 3 0x7281f8 7785 1447.28 1547.28
row 3 column 4 0x7282ef 01880 1387.68 1487.68
row 3 column 5 0x72daa4 8229 1510.7 1610.7
row 4 column 1 0x72a60a 6414 1437.7 1537.7
row 4 column 2 0x72c8e8 5510 1383.87 1483.87
row 4 column 3 0x733d39 00529 1402.57 1502.57
row 4 column 4 0x72bade 4332 1505.11 1605.11
row 4 column 5 0x7256f4 02248 1461.12 1561.12
row 5 column 1 (top left) 0x722bc0 2167 1421.46 1521.46
row 5 column 2 0x7256d8 2800 1429.19 1529.19
row 5 column 3 0x726dcc 00185 1467.64 1567.64
row 5 column 4 0x72d915 02502 1433.96 1533.96
row 5 column 5 (top right) 0x7256cb 7199 1432.8 1532.8