APEX BCM Calibration

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BCM Calibrations [2 hours]

Procedure:

1. It is useful to have someone over in MCC to help coordinate the calibration with them.
2. The target used in this calibration is irrelevant, so try to use a solid target if possible but not necessary.
3. Start the LHRS and RHRS runs with no beam and with a clock prescale LHRS=100.
4. Ask to mcc for the set of currents: I = 0, 3, 0, 5, 0, 10, 0, 15, 0, 22.5, 0,3, 0, 5, 0, 10, 0, 15,0, 22.5, μA. Each current should be send for at least 90 seconds
5. Take data on carbon target with I = 0, 3, 0, 5, 0, 7, 0, 10, 0, 15, 0, 20, 0, 25, 0, 30, 0, 40, 0, 50, 0, 60, 0, 70, 0, 80, 0 μA (or as high a current as available). Each beam period (with or without current) should last 90 s. If you get a trip during a beam up period, take 90s of beam off and restart that beam up period. If you get a trip during a beam up period, take 90s of beam off and restart that beam up period.

Date	Coinc CODA run	Comments
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Unser Calibration [2 hours]

1. The unser calibration is done using the wire and the current source in the Counting House, without beam time (any opportunistic time when there is no beam).
2. To access to the wire current supply, in JMenu search for "Unser" and choose "Hall A Unser BCM".
3. Start CODA runs in both arm before sending any current to the Unser, Use the LHRS Clock as trigger (PS8=100).
4. Send to the wire different currents 0,5,0,20,0,40,0,60,0,80,0,100,0,5,0,20,0,40,0,60,0,80,0,100,0 (uA). Each current should be sent for at least 90 seconds.

Date	Coinc CODA run	Comments
Feb. 7th, 2019	run 3559	HALOG 3648676