Proton Calorimetry/Experimental Runs/2018/Oct25-6: Difference between revisions
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| style="text-align: center;" | 70, +ve | | style="text-align: center;" | 70, +ve | ||
| style="text-align: center;" | Tracker (C2) | | style="text-align: center;" | Tracker (C2) | ||
| style="text-align: center;" | | | style="text-align: center;" | 160-200pA/~10 kHz | ||
| style="text-align: center;" | 2 mm centred | | style="text-align: center;" | 2 mm centred | ||
| style="text-align: center;" | run00_2mmCCol_160pA_TrackTrig | | style="text-align: center;" | run00_2mmCCol_160pA_TrackTrig | ||
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| style="text-align: center;" | 70, +ve | | style="text-align: center;" | 70, +ve | ||
| style="text-align: center;" | Tracker (C2) | | style="text-align: center;" | Tracker (C2) | ||
| style="text-align: center;" | 170pA/~10 kHz | | style="text-align: center;" | 160-170pA/~10 kHz | ||
| style="text-align: center;" | 2 mm centred | | style="text-align: center;" | 2 mm centred | ||
| style="text-align: center;" | | | style="text-align: center;" | run01_2mmCCol_160pA_TrackTrig | ||
| style="text-align: center;" | | | style="text-align: center;" | Repeat of previous test; scope vertical trace increased to 100mV/div. | ||
|- | |||
| style="text-align: center;" | 02 | |||
| style="text-align: center;" | -900 | |||
| style="text-align: center;" | 70, +ve | |||
| style="text-align: center;" | Tracker (C2) | |||
| style="text-align: center;" | 100pA/~10 kHz | |||
| style="text-align: center;" | 2 mm centred | |||
| style="text-align: center;" | run02_2mmCCol_100pA_TrackTrig | |||
| style="text-align: center;" | Lower current check. | |||
|- | |||
| style="text-align: center;" | 03 | |||
| style="text-align: center;" | -900 | |||
| style="text-align: center;" | 70, +ve | |||
| style="text-align: center;" | Tracker (C2) | |||
| style="text-align: center;" | 80pA/~10 kHz | |||
| style="text-align: center;" | 2 mm centred | |||
| style="text-align: center;" | run03_2mmCCol_80pA_TrackTrig | |||
| style="text-align: center;" | Repeat of run 2. | |||
|- | |||
| style="text-align: center;" | 04 | |||
| style="text-align: center;" | -900 | |||
| style="text-align: center;" | 70, +ve | |||
| style="text-align: center;" | Tracker (C2) | |||
| style="text-align: center;" | 80pA/~10 kHz | |||
| style="text-align: center;" | 2 mm centred | |||
| style="text-align: center;" | run03_2mmCCol_80pA_TrackTrig | |||
| style="text-align: center;" | Repeat of run 2. | |||
|- | |- | ||
|} | |} |
Revision as of 10:41, 26 October 2018
Beam tests of the single module with PRaVDA Silicon strip tracker with trigger pulse output at the Birmingham Cyclotron with a 36 MeV beam.
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 |
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
- Bragg Peak Measurements
- Combined scope / digitizer measurements with pristine bragg peak, 100mV trigger threshold
- Combined scope / digitizer measurements with pristine bragg peak, varying trigger threshold
- Degrade beam energy and measure response with 1-6mm PMMA before calorimeter
- PRaVDA box with 2mm collimator, trigger from scope
- 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
- Bragg Peak Measurements
- Combined scope / digitizer measurements with pristine bragg peak, 100mV trigger threshold
- Combined scope / digitizer measurements with pristine bragg peak, varying trigger threshold
- Degrade beam energy and measure response with 1-6mm PMMA before calorimeter
- Offset 2mm collimator (by 6mm) for optimal trigger threshold
- Double 2mm collimator (12mm separated) for optimal trigger threshold
- PRaVDA box with 2mm collimator, trigger from scope
- PRaVDA box with 2mm collimator for trigger output
- Degrade beam with 1-6mm PMMA with tracker
Experiment Log
25/10/18
- Set up apparatus as described in equipment list.
- Beam experienced difficulties, delaying data collection.
- 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.
- 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
- 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)
- Split trigger found to be too small for Digitiser (accepts trigger of order ~V), hence Digitiser set to self-trigger mode.
- Aligned calorimeter to tracker, with centre of mylar window and tracker window aligned approximately by eye.
- Performed beam test (had approx 30 mins beam time), details provided below.
- Was found that the tracker was not completely set centre to the beam.
- Error in data taking: Trigger trace was recorded instead of PMT trace.
26/10/18
- Tracker was realigned to be centred to the beam.
- Using Tipp-Ex markers, window to scintillator was aligned more accurately to window of tracker.
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. |
04 | -900 | 70, +ve | Tracker (C2) | 80pA/~10 kHz | 2 mm centred | run03_2mmCCol_80pA_TrackTrig | Repeat of run 2. |