Proton Calorimetry/Experimental Runs/2016/Aug2-3

Clatterbridge experimental run, August 2nd--3rd: Day 1

Wheel calibration

Equipment setup:

• DC offset: -30 mV
• Record length: 456 ns
• Threshold: 40 LSB
• Trigger: 194 mV
• Gate offset: 10 ns
• Pre-trigger: 50 ns
• Charge sensitivity: 20 fc/LSB

High voltage	Trigger	Rate and additional information	Collimator size & beam information	Wheel step position	Data recorded	Run number	Comments
-900	ST	Beam off: I: 150.51 μ Beam on: Rate: 300 kHz on startup. Rate: 25 kHz at -100 mV.	1.98 mm Beam startup: Arc current: 750 mV Gas source: 0.67 cc/min Beam settings change: Arc current: 50 μ Gas source: 0.39 cc/min Dose rate: 0.1 MU/min	N/A		[startup]	Beam startup and calibration
-900	ST			0	ADC	01	~7,000 events in peak
-900	ST			0	waveforms	03	~7,000 events in peak
-900	ST			20	ADC	05	~7,000 events in peak
-900	ST			40	ADC	06	~7,000 events in peak
-900	ST			60	ADC	07	~7,000 events in peak
-900	ST			80	ADC	08	~7,000 events in peak
-900	ST			100	ADC	09	~7,000 events in peak
-900	ST			100	waveforms (~0.5 GB)	11	Beam dropped. Repeat in Run 13.
-900	ST			100	waveforms (~1 GB)	13	Repeat of Run 10.
-900	ST			120	ADC	14	~7,000 events in peak
-900	ST			140	ADC	15	~7,000 events in peak
-900	ST			160	ADC	16	~6,000 events in peak
-900	ST			130	ADC	17	~7,000 events in peak
-900	ST			150	ADC	18	~6,000 events in peak
-900	ST			165	ADC	19	~6,000 events in peak. Just before Bragg peak, which is at wheel step 166.
-900	ST			170	ADC	20	Beam dropped. ~4,000 events in peak. Repeat in Run 21.
-900	ST			170	ADC	21	Repeat of Run 20. ~4,000 events in peak.
-900	ST			173	ADC	22	Beam dropped. Repeat in Run 23. Bragg peak fall-off area.
-900	ST			173	ADC	23	Repeat of Run 22. ~1.800 events in peak
-900	ST			175	ADC	24
-900	ST			179	ADC	25	~30 events in peak. No ``peak apparent; potentially only secondaries.
-900	ST			176	ADC	26	~7,000 events in peak. Tip of Bragg peak.