Proton Calorimetry/Experimental Runs/2016/Aug2-3

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Dose calibration at Clatterbridge: 0.9 Gy per monitor unit (MU) at 60 MeV.

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
(V)
Trigger Rate & 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 (Just before Bragg peak, which is at wheel step 166.) ADC 19 ~6,000 events in peak.
-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 (Bragg peak fall-off area.) ADC 22 Beam dropped. Repeat in Run 23.
-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 167 (Tip of Bragg peak.) ADC 26 ~7,000 events in peak.
-900 ST Rate: 25 kHz (1,000 events in 45 ms) 0 ADC 26 ~7,000 events in peak. Back to starting point on calibration wheel to compare with Run 01.
BEAM OFF.
Integrated dose: Dose A: 36.7 MU. Dose B: 36.6 MU.
Total beam time run: 99 min.


Day 2

Scope 2: LeCroy HDO6104 [1], Datasheet Template:PDFlink