IAC 1-8-08

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 [inches] 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. Position at 1cm from trumpet of feedthrough.

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