IAC 1-8-08

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90/10 ArCo2

HV settings
Cable # Volts Desc
223A10 Metalica Sense Wire #4
223A11 Plsstica Sense Wire #4
223A12 1105 PMT Scintillator
223A13 1110 Middle Scintillator
223A14 1090 Last Scintillator (Veto)
223A15 V260 Scaler Input
223A16 V260 Scaler Input


Drift Chamber HV

HV settings
Cable # Volts Current (ma)
Sense 1456
Field 729
Guard 731

ADC Channel ID

ADC Channel IDs
Channel Desc
0 Metalica wire 1
1 Plastica wire 1
14 Front Scint
15 Back Scint
16 Veto Scint


Run 297:

First measurement with ADCs. Zero position (beam hitting trumpet).

Run 298:

Move Drift chamber 1 cm (-20,000 on axis 2, 0.4 left arrow on GUI) away from trumpet.

We had no PMT coincidences (OR was on).

This run should be ignored because table position meter ("Axis-3" MC 2000) was on and that caused noise on PMT signals.

Run 298:

Run 300. gate width: 600ns. PMTs not in ADCs. Timing is around 100 ns out of time. Plastica and Metalica look good.

Run 301: Increase gate width to 1 us. PMTs still in the ADCs. Longer gate width allows for complete integration of the wirechamber ADCs. Signals are better.


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