Proton Calorimetry/Experimental Runs/2021/Apr15
Afternoon test at UCLH with photodiodes and CMOS sesnor.
Experiment Equipment
| Item | Notes |
|---|---|
| Network Hub | Set in control room to take output from experimental room ethernet connection. Control laptops connected via 5GHz WiFi. |
| Control Laptop x3 | 2x remote control for sensor and FPGA, 1 for notes/web GUI. |
| Ethernet Cable x 3 | To connect DAQ laptops to network in the experimental room, network hub to network in control room. |
| Portable Enclosure | Modified Big Zarges Waterproof Wheeled Equipment Case.
Features mount for scintillator stack, front and back openings for beam, patch panel with ports for SHV, BNC, SMA, USB, Camera Link cables. |
| Scintillator stack | X x 2 mm, Y x 2.6 mm and Z x 3 mm sheets in ascending order from the front/beam of the end of the scintillator. Sheet numbers from front to end (in beam direction): UNKNOWN. |
| ISDI CMOS sensor | sensor pixel dimension: 1030 x 1536. NO optical grease between scintillator and sensor. Connected to DAQ PC via Camera Link cable. |
| Nikon D7500 | Connected to DAQ Laptop via USB cable. |
| DAQ laptop x2 | Control sensor and photodiode acquisition. |
| Nexys Video FPGA development board. | For interfacing between DDC232 and PC. |
| Rev. 2 Texas Instruments DDC232 custom circuit board (x2) | Each housing 16x Hamamatsu S12915-16R photodiodes, coupled directly to scintillator sheets. Aligned by eye to scintillator sheets. |
| Gloves | For handling scintillator |
Schematic
ISDI Sensor Instructions
General Sensor Configuration
- Base Configuration is 14 x 1 Bit
- Resolution is 1030 x 1536 pixels
- For selecting pixel rows in centre: Use horizontal offset (ignore DVAL to activate field) and horizontal resolution
Increase number of frame buffers
- To increase the number of frame buffers to the allowed maximum, start XCAP as administrator.
- Select Capture/Sequence Capture/Video to Frame Buffers/Driver Assistant
- Tick box in left field, then set number of frame buffers here.
Serial Terminal instructions for ISDI sensor
- Find serial terminal in PIXCI(R) tab of sensor control software.
- In Controls/Options: Make sure "Send string with CR" is selected. Should be default.
- In Controls/Setup: Select Serial Port: Enabled. Baud rate has to be 115200
- Set low full well mode using W000300000
- Set high full well mode using W000300004
- Read full well mode using R0003
Continuous Field buffer setting
- This setting makes sure that the buffer is filled with a new frame as they come in. If this option is not selected the sensor and software will not be synchronised and we *will record a lot of pitch black images.
- Select Capture/Live Options//Live Mode/Live Video: Continuous All buffer capture
DDC232 Instructions
- Bash script
prog.shexecutesFTDI.cppandlivePlot.cpp. Execute with. prog.sh 2 350 170 0 50 true Data/capture.txtin the directoryPhotodiodes.- First argument is the number of DDC232s.
- Second argument is the full-scale range (FSR) in pC. Choices are: 12.5, 50, 100, 150, 200, 250, 300, 350.
- Third argument is the integration time in us. Range is 170-1455. Set in multiples of 5 us.
- Fourth argument is the number of measurements to acquire. Typically acquire 5700 measurements per second. Set to 0 for infinite loop.
- Fifth argument is the rate in Hz to update the file
average.csvfor ROOT/web GUI plotting. - Sixth argument is a boolean to choose whether to display the ROOT plot.
- Seventh argument is the filename and destination for the output hexadecimal data.
- After acquisition, close ROOT by choosing File->Quit in the ROOT window and then stopping DAQ (if in infinite loop) with CTRL-C.
Experiment Plan
- Shoot-through measurements (back & front) for light calibration and level setting.
- Range measurements between 70-120 MeV with 1mm steps with CMOS sensor and photodiodes.
- High intensity range measurements between 70-120 MeV with 1mm steps with photodiodes at optimal light level.
- Live measurement of 3cm x 3cm x 3cm treatment plan.
Experiment Notes
Range calorimeter measurements with ISDI sensor + photodiodes.
Images from sensor: TBD
Photodiode hexadecimal data: /unix/pbt/data/uclh/20210415/DDC232
- full sensor area
| Run number | Full Well Mode | Beam Energy (MeV/u) | Range (estimated) | Current (nA) | Spot size (mm) | DDC232 FSR (pC) | DDC232 Integration Time (us) | Degrader WET (mm) | Comments |
|---|---|---|---|---|---|---|---|---|---|
| 0 | high | Background | N/A | N/A | N/A | 350 | 170 | 0 | room light on |
| 1 | high | Background | N/A | N/A | N/A | 12.5 | 170 | 0 | repeat – room light on |
| 2 | high | Background | N/A | N/A | N/A | 12.5 | 170 | 0 | room lights off |
| 3 | high | 245 | 366.3 | 10 | 7.1 | 12.5 | 170 | 57.33 | shoot-through, gantry angle 270° |
| 4 | high | 245 | 366.3 | 20 | 7.1 | 12.5 | 170 | 57.33 | shoot-through, gantry angle 270°, CMOS sensor saturated |
| 5 | high | 245 | 366.3 | 10 | 7.1 | 12.5 | 170 | 57.33 | shoot-through, gantry angle 90° |
| 6 | high | 245 | 366.3 | 10 | 7.1 | 12.5 | 170 | 57.33 | shoot-through, gantry angle 90° |
| 7 | high | 105 | 300 | 7.1 | 12.5 | 170 | 0 | CMOS sensor saturated, BP seen | |
| 8 | high | 105 | 150 | 7.1 | 12.5 | 170 | 0 | CMOS sensor saturated, BP seen | |
| 9 | high | 70 | 40.8 | 700 | 7.1 | 12.5 | 170 | 0 | CMOS sensor saturated, BP seen |
| 10 | high | 70 | 40.8 | 350 | 7.1 | 12.5 | 170 | 0 | Having issues with beam requests (sharing between 2 gantries has commenced) |
| 11 | high | 80 | 51.8 | 500 | 7.1 | 12.5 | 170 | 0 | Couple 1000 off saturation |
| 12 | high | 90 | 63.9 | 400 | 7.1 | 12.5 | 170 | 0 | Saturation |
| 13 | high | 100 | 77.1 | 350 | 7.1 | 12.5 | 170 | 0 | |
| 14 | high | 110 | 91.3 | 300 | 7.1 | 12.5 | 170 | 0 | Saturation |
| 15 | high | 120 | 106.5 | 270 | 7.1 | 12.5 | 170 | 0 | BP not captured in range |
| 16 | high | 110 | 91.3 | 150 | 7.1 | 12.5 | 170 | 0 | |
| 17 | high | 105 | 350 | 7.1 | 12.5 | 170 | 0 | Saturated | |
| 18 | high | 100 | 77.1 | 200 | 7.1 | 12.5 | 170 | 0 | Saturated |
| 19 | high | 100 | 77.1 | 350 | 7.1 | 12.5 | 1000 | 0 | Saturated |
| 20 | high | 95 | 400 | 7.1 | 12.5 | 170 | 0 | Saturated | |
| 21 | high | 90 | 63.9 | 200 | 7.1 | 12.5 | 170 | 0 | |
| 22 | high | 90 | 63.9 | 400 | 7.1 | 12.5 | 1000 | 0 | |
| 23 | high | 85 | 500 | 7.1 | 12.5 | 170 | 0 | just missed saturation | |
| 24 | high | 80 | 51.8 | 250 | 7.1 | 12.5 | 170 | 0 | |
| 25 | high | 80 | 51.8 | 500 | 7.1 | 12.5 | 1000 | 0 | |
| 26 | high | 75 | 600 | 7.1 | 12.5 | 170 | 0 | ||
| 27 | high | 70 | 40.8 | 350 | 7.1 | 12.5 | 170 | 0 | |
| 28 | high | 70 | 40.8 | 700 | 7.1 | 12.5 | 1000 | 0 | |
| 29 | N/A | Treatment Plan | N/A | N/A | N/A | 12.5 | 170 | 0 | clinical mode from now - scanned field |
| 30 | N/A | Treatment Plan | N/A | N/A | N/A | 12.5 | 170 | 0 | repeat |
| 31 | N/A | Treatment Plan | N/A | N/A | N/A | 50 | 170 | 0 |