Proton Calorimetry/Experimental Runs/2018/Oct25-6

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Beam tests of the single module with PRaVDA Silicon strip tracker with trigger pulse output at the Birmingham Cyclotron with a 36 MeV beam.

Contents

Equipment List

Item Notes
Single Module Scintillator Block 3cm x 3cm x 5cm standard scintillator block. Optical gel required to couple Scintillator to PMT
Photomultiplier Tube Hamamatsu R13089 2"
Portable Enclosure Modified Peli 1510 Waterproof Wheeled Equipment Case.

230 x 555 x 350mm
Features mount for scintillator and PMT, opening for beam, and ports for SHV, BNC, and SMA cables.
Mylar window with Al support mounted to internal face: approximately light-tight.
BNC output from case connected to SMA splitter.

LeCroy HDO6104 Oscilloscope Records PMT output, connected via SMA-BNC conversion.
Caen DT5751 Digitiser Records PMT output, connected via SMA-MCX conversion. Used channel 3.
DAQ Laptop Controls Caen HV supply; records data from Caen digitiser.
Caen NDT1470 HV Supply Supplies HV to PMT
PRaVDA Strip Tracker PRaVDA Unit A, 3x150um Si strip sensors with 90.4um strip pitch.
Firmware version update to yield square pulse out when 2 or 3 layers have a strip over threshold per read out cycle
Control Laptop x 3 Two used for Remote Desktop control of LeCroy Oscilloscope and DAQ Laptop. Third used for taking down notes.
Ethernet Switcher Set in experiment room and connected LeCroy Oscilloscope and DAQ laptop. Output sent to control room Network Hub.
Network Hub Set in control room to take output from ethernet switcher. Control laptops connected via ethernet or 5GHz WiFi.
Ethernet Cable x 3 To connect 1 control laptop, the LeCroy HDO6104 and DAQ Laptop to their respective network hubs.
Ethernet Cable To connect control Network Hub to Ethernet Switcher.
Male-to-Male SMA Cable Signal from enclosure port to Splitter
DC-4200 MHz Signal Splitter Splits SMA signal to two SMA signals – sent to Oscilloscope and Digitiser.
Male SMA to Male BNC cable Sends 1 output from splitter to Oscilloscope.
Male SMA to Male MCX cable Sends 1 output from splitter to Digitiser
USB Cable Caen HV unit to DAQ Laptop
Gloves For handling scintillator
Optical gel For coupling scintillator to PMT
Wipes For removing optical gel

Experiment List

28 MeV beam Scattering Foil in 2mm diameter collimator 10kHz rate ~= 160pA onto Transmission Chamber before 2mm collimation

  1. Bragg Peak Measurements
  2. Combined scope / digitizer measurements with pristine bragg peak, 100mV trigger threshold
  3. Combined scope / digitizer measurements with pristine bragg peak, varying trigger threshold
  4. Degrade beam energy and measure response with 1-6mm PMMA before calorimeter
  5. PRaVDA box with 2mm collimator, trigger from scope
  6. PRaVDA box with 2mm collimator for trigger output


36 MeV beam Scattering Foil in 2mm diameter collimator 10kHz rate ~= 160pA onto Transmission Chamber before 2mm collimation

  1. Bragg Peak Measurements
  2. Combined scope / digitizer measurements with pristine bragg peak, 100mV trigger threshold
  3. Combined scope / digitizer measurements with pristine bragg peak, varying trigger threshold
  4. Degrade beam energy and measure response with 1-6mm PMMA before calorimeter
  5. Offset 2mm collimator (by 6mm) for optimal trigger threshold
  6. Double 2mm collimator (12mm separated) for optimal trigger threshold
  7. PRaVDA box with 2mm collimator, trigger from scope
  8. PRaVDA box with 2mm collimator for trigger output
  9. Degrade beam with 1-6mm PMMA with tracker

Experiment Log

25/10/18

  1. Set up apparatus as described in equipment list.
  2. Beam experienced difficulties, delaying data collection.
  3. Tracker operates on a 26MHz clock, and a trigger is sent whenever 2/3 silicon layers in tracker record events in a timestamp. Trigger tests were conducted with noise, hence a random rate in tests below.
  4. Tested trigger output of Tracker into Oscilloscope: square wave of period ~15 ns with amplitude ~400 mV. Pulse example recorded on Oscilloscope disk in folder: SShaikh/Tracker Trigger
  5. Placed signal splitter for trigger to send to both Digitiser and Oscilloscope. Amplitude reduced to ~50%. Pulse example recorded on Oscilloscope disk in folder: SShaikh/Tracker Trigger (Split)
  6. Split trigger found to be too small for Digitiser (accepts trigger of order ~V), hence Digitiser set to self-trigger mode.
  7. Aligned calorimeter to tracker, with centre of mylar window and tracker window aligned approximately by eye.
  8. Performed beam test (had approx 30 mins beam time), details provided below.
  9. Was found that the tracker was not completely set centre to the beam.
  10. Error in data taking: Trigger trace was recorded instead of PMT trace.

26/10/18

  1. Tracker was realigned to be centred to the beam.
  2. Using Tipp-Ex markers and lable stickers, window to scintillator was aligned more accurately to window of tracker.
  3. Test of tracker/PMT synchronisation (check tracker trigger pulse/PMT pulse sync and numbers of events in files) with scope vertical scale 50mV/div. Window center corresponds to right edge vertical line intersecting upper edge horizontal line, looking at the window.
  4. Test of tracker/PMT synchronisation with scope vertical scale 100mV/div, 2mm collimator centered.
  5. Test of tracker/PMT synchronisation with lower current, 2mm collimator centered.
  6. Degrade beam energy and measure response with 0.95mm, 2.01mm, 2.96mm, 3.95mm, 4.90mm, 5.70mm PMMA before calorimeter, 2mm collimator centered.
  7. Offset 2mm collimator (by 6mm in +ve) and measure response with 5.70 mm PMMA absorber.
  8. Double 2mm collimator (12mm separated in x direction) and measure response with 5.70 mm PMMA absorber.
  9. Offset 2mm collimator (by 6mm in +ve), no absorber.
  10. Double 2mm collimator (12mm separated in x direction), no absorber.
  11. Double 2mm collimator (12mm separated in x direction) repetition with lower current, no absorber.
  12. Double 2mm collimator (12mm separated in x direction) with left-hand hole covered by 3.95 mm PMMA.

Beam Tests

Thursday 25th October

PMT Current at HV supply -900 V, beam off: 150 μA

28MeV beam. Scope triggered by tracker. Cyclotron issues meant short run (~90 mins). Test of tracker triggering/scope synchronisation.

Scope timebase: 20ns/div; trigger delay 80ns; C1 vertical scale 50mV/div.

Tracker data indicates beam horizontal offset of 12mm; vertical offset of 1.3mm.

Data stored in directory ProCal_Birm_25-10-18

Run Number High Voltage (V) Trigger Level (mV) Trigger Source Beam Current / Rate Collimator Filename Notes
00 -900 70, +ve Tracker (C2) 170pA/~10 kHz 2 mm centred run00_2mmCCol_160pA_TrackTrig First test of tracker/PMT synchronisation
01 -900 70, +ve Tracker (C2) 160pA/~10 kHz 2 mm centred run01_2mmCCol_160pA_TrackTrig Also took Caen ADC data
02 -900 70, +ve Tracker (C2) 160pA/~10 kHz 2 mm centred run02_2mmCCol_160pA_TrackTrig Caen ADC run 01 data also includes run 02 (long run)

Friday 26th October

PMT Current at HV supply -900 V (actual 899.8V), beam off: 150.15 μA.

36MeV beam: scattering foil inserted to increase beam size; 2 mm on-axis collimator.

Scope triggered by tracker. Scope timebase: 20ns/div; trigger delay 80ns; C1 vertical scale 50mV/div.

Data stored in directory ProCal_Birm_26-10-18

Run Number High Voltage (V) Trigger Level (mV) Trigger Source Beam Current / Rate Collimator Filename Notes
00 -900 70, +ve Tracker (C2) 160-200pA/~10 kHz 2 mm centred run00_2mmCCol_160pA_TrackTrig Test of tracker/PMT synchronisation with 5s tracker run, 50,000 scope segments, all traces saved; check tracker trigger pulse/PMT pulse sync and numbers of events in files.
01 -900 70, +ve Tracker (C2) 160-170pA/~10 kHz 2 mm centred run01_2mmCCol_160pA_TrackTrig Repeat of previous test; scope vertical trace increased to 100mV/div.
02 -900 70, +ve Tracker (C2) 100pA/~10 kHz 2 mm centred run02_2mmCCol_100pA_TrackTrig Lower current check.
03 -900 70, +ve Tracker (C2) 80pA/~10 kHz 2 mm centred run03_2mmCCol_80pA_TrackTrig Repeat of run 2, no ADC data.
04 -900 70, +ve Tracker (C2) 90pA/~10 kHz 2 mm centred, 0.95mm PMMA run04_2mmCCol_90pA_1mmPMMA Tracker triggered, 0.95mm PMMA.
05 -900 70, +ve Tracker (C2) 70pA/~10 kHz 2 mm centred, 0.95mm PMMA run05_2mmCCol_70pA_1mmPMMA Repeat of run 4 (ADC data for runs 4, 5 and 6).
06 -900 70, +ve Tracker (C2) 80pA/~10 kHz 2 mm centred, 0.95mm PMMA run06_2mmCCol_80pA_1mmPMMA Repeat of run 4 (ADC data for runs 4, 5 and 6).
07 -900 70, +ve Tracker (C2) 60pA/~10 kHz 2 mm centred, 2.01mm PMMA run07_2mmCCol_60pA_2mmPMMA Tracker triggered, 2.01mm PMMA.
08 -900 70, +ve Tracker (C2) 80pA/~10 kHz 2 mm centred, 2.01mm PMMA run08_2mmCCol_80pA_2mmPMMA Repeat of run 7 (ADC data for runs 7, 8 and 9).
09 -900 70, +ve Tracker (C2) 90pA/~10 kHz 2 mm centred, 2.01mm PMMA run09_2mmCCol_90pA_2mmPMMA Repeat of run 7 (ADC data for runs 7, 8 and 9).
10 -900 70, +ve Tracker (C2) 80pA/~10 kHz 2 mm centred, 2.96mm PMMA run10_2mmCCol_80pA_3mmPMMA Tracker triggered, 2.96mm PMMA.
11 -900 70, +ve Tracker (C2) 85pA/~10 kHz 2 mm centred, 2.96mm PMMA run11_2mmCCol_85pA_3mmPMMA Repeat of run 10 (ADC data for runs 10, 11 and 12).
12 -900 70, +ve Tracker (C2) 90pA/~10 kHz 2 mm centred, 2.96mm PMMA run12_2mmCCol_90pA_3mmPMMA Repeat of run 10 (ADC data for runs 10, 11 and 12).
13 -900 70, +ve Tracker (C2) 50pA/~10 kHz 2 mm centred, 3.95mm PMMA run13_2mmCCol_50pA_4mmPMMA Tracker triggered, 3.95mm PMMA.
14 -900 70, +ve Tracker (C2) 77pA/~10 kHz 2 mm centred, 3.95mm PMMA run14_2mmCCol_77pA_4mmPMMA Repeat of run 13 (ADC data for runs 13, 14 and 15).
15 -900 70, +ve Tracker (C2) 90pA/~10 kHz 2 mm centred, 3.95mm PMMA run15_2mmCCol_90pA_4mmPMMA Repeat of run 13 (ADC data for runs 13, 14 and 15).
16 -900 70, +ve Tracker (C2) 70pA/~10 kHz 2 mm centred, 4.90mm PMMA run16_2mmCCol_70pA_5mmPMMA Tracker triggered, 4.90mm PMMA. Large current fluctuations: check shape of ADC spectrum.
17 -900 70, +ve Tracker (C2) 65pA/~10 kHz 2 mm centred, 4.90mm PMMA run17_2mmCCol_65pA_5mmPMMA Repeat of run 16 (ADC data for runs 16, 17 and 18).
18 -900 70, +ve Tracker (C2) 60pA/~10 kHz 2 mm centred, 4.90mm PMMA run18_2mmCCol_60pA_5mmPMMA Repeat of run 16 (ADC data for runs 16, 17 and 18).
19 -900 70, +ve Tracker (C2) 50pA/~10 kHz 2 mm centred, 5.70mm PMMA run19_2mmCCol_50pA_6mmPMMA Tracker triggered, 5.70mm PMMA.
20 -900 70, +ve Tracker (C2) 50pA/~10 kHz 2 mm centred, 5.70mm PMMA run20_2mmCCol_50pA_6mmPMMA Repeat of run 19 (ADC data for runs 19, 20 and 21).
21 -900 70, +ve Tracker (C2) 60pA/~10 kHz 2 mm centred, 5.70mm PMMA run21_2mmCCol_60pA_6mmPMMA Repeat of run 19 (ADC data for runs 19, 20 and 21).
22 -900 70, +ve Tracker (C2) 90-140pA/~10 kHz 2 mm with 6mm offset in +ve x, 5.70mm PMMA. run22_2mmOSCol_100pA_6mmPMMA Tracker triggered, 2 mm collimator with 6 mm offset in +ve x direction; 5.70 mm PMMA absorber.
23 -900 70, +ve Tracker (C2) 85-120pA/~10 kHz 2 mm with 6mm offset, 5.70mm PMMA run23_2mmOSCol_100pA_6mmPMMA Repeat of run 22 (ADC data for runs 22, 23 and 24).
24 -900 70, +ve Tracker (C2) 10-75pA/~10 kHz 2 mm with 6mm offset, 5.70mm PMMA run24_2mmOSCol_70pA_6mmPMMA Repeat of run 22 (ADC data for runs 22, 23 and 24).
25 -900 70, +ve Tracker (C2) 40-50pA/~10 kHz 2 mm pair, centres 12mm apart in x, 5.70mm PMMA run25_2mmSBCol_40pA_6mmPMMA Tracker triggered, 2 mm hole pair collimator with centres 12 mm apart in x direction, 5.70 mm PMMA absorber.
26 -900 70, +ve Tracker (C2) 45pA/~10 kHz 2 mm pair, centres 12mm apart, 5.70mm PMMA run26_2mmSBCol_45pA_6mmPMMA Repeat of run 25 (ADC data for runs 25, 26 and 27).
27 -900 70, +ve Tracker (C2) 45-55pA/~10 kHz 2 mm pair, centres 12mm apart, 5.70mm PMMA run27_2mmSBCol_50pA_6mmPMMA Repeat of run 25 (ADC data for runs 25, 26 and 27).
28 -900 70, +ve Tracker (C2) 70-90pA/~10 kHz 2 mm with 6mm offset in +ve x. run28_2mmOSCol_70pA_TrackTrig Tracker triggered, 2 mm collimator with 6 mm offset in +ve x direction.
29 -900 70, +ve Tracker (C2) 60pA/~10 kHz 2 mm with 6mm offset run29_2mmOSCol_60pA_TrackTrig Repeat of run 28 (ADC data for runs 28, 29 and 30).
30 -900 70, +ve Tracker (C2) 60pA/~10 kHz 2 mm with 6mm offset run30_2mmOSCol_60pA_TrackTrig Repeat of run 28 (ADC data for runs 28, 29 and 30).
31 -900 70, +ve Tracker (C2) 40-50pA/~10 kHz 2 mm pair, centres 12mm apart in x. run31_2mmSBCol_46pA_TrackTrig Tracker triggered, 2 mm hole pair collimator with centres 12 mm apart in x direction.
32 -900 70, +ve Tracker (C2) 40-50pA/~10 kHz 2 mm pair, centres 12mm apart run32_2mmSBCol_45pA_TrackTrig Repeat of run 31 (ADC data for runs 31, 32 and 33).
33 -900 70, +ve Tracker (C2) 35-40pA/~10 kHz 2 mm pair, centres 12mm apart run33_2mmSBCol_40pA_TrackTrig Repeat of run 31 (ADC data for runs 31, 32 and 33); large current dropout.
34 -900 70, +ve Tracker (C2) 10pA/~10 kHz 2 mm pair, centres 12mm apart in x. run34_2mmSBCol_10pA_TrackTrig Tracker triggered, 2 mm hole pair collimator with centres 12 mm apart in x direction; lower current repeat of 2 hole collimator.
35 -900 70, +ve Tracker (C2) 10pA/~10 kHz 2 mm pair, centres 12mm apart run35_2mmSBCol_10pA_TrackTrig Repeat of run 34 (ADC data for runs 34, 35 and 36).
36 -900 70, +ve Tracker (C2) 8pA/~10 kHz 2 mm pair, centres 12mm apart run36_2mmSBCol_8pA_TrackTrig Repeat of run 34 (ADC data for runs 34, 35 and 36).
37 -900 70, +ve Tracker (C2) 20-24pA/~10 kHz 2 mm pair, centres 12mm apart with 3.95mm PMMA over 1 hole. run37_2mmEPCol_20pA_4mmPMMA Tracker triggered, 2 mm hole pair collimator with centres 12 mm apart in x direction; left-hand hole covered by 3.95&mm PMMA.
38 -900 70, +ve Tracker (C2) 11pA/~10 kHz 2 mm pair, centres 12mm apart with 3.95mm PMMA over 1 hole. run38_2mmEPCol_11pA_4mmPMMA Repeat of run 37 (ADC data for runs 37, 38 and 39).
39 -900 70, +ve Tracker (C2) 9pA/~10 kHz 2 mm pair, centres 12mm apart with 3.95mm PMMA over 1 hole. run39_2mmEPCol_9pA_4mmPMMA Repeat of run 37 (ADC data for runs 37, 38 and 39).
40 -900 70, +ve Tracker (C2) 20-70pA/~10 kHz 2 mm pair, centres 12mm apart with 3.95mm PMMA over 1 hole. run40_2mmEPCol_40pA_4mmPMMA Tracker triggered, 2 mm hole pair collimator with centres 12 mm apart in x direction; left-hand hole covered by 3.95&mm PMMA.
41 -900 70, +ve Tracker (C2) 40-120pA/~10 kHz 2 mm pair, centres 12mm apart with 3.95mm PMMA over 1 hole. run41_2mmEPCol_40pA_4mmPMMA Repeat of run 40 (ADC data for runs 40, 41 and 42); large current fluctuations.
42 -900 70, +ve Tracker (C2) 15-45pA/~10 kHz 2 mm pair, centres 12mm apart with 3.95mm PMMA over 1 hole. run42_2mmEPCol_30pA_4mmPMMA Repeat of run 40 (ADC data for runs 40, 41 and 42).
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