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. Hole for sensor powering. Mylar windows with Al support mounted to internal face: approximately light-tight.
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
Digital Caliper	For measuring PMMA air gaps

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.sh executes FTDI.cpp and livePlot.cpp. Execute with . prog.sh 2 350 170 0 50 true Data/capture.txt in the directory Photodiodes.
  • 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.csv for 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: TBD

• full sensor area
• shooting on BACK WINDOW

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	Thumbnail
Run	Full-well	Energy	Current	Range	Spot Size	FSR	t_INT	Degrader	Notes
00	high	N/A	-	N/A	None	350	170	0	background
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	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	"ST, gantry angle 270"
4	high	245	20	7.1	12.5	170	57.33	"ST, gantry angle 270, CMOS sensor saturated"
5	high	245	366.3	10	7.1	12.5	170	57.33	"ST, gantry angle 90"
6	high	245	366.3	10	7.1	12.5	170	57.33	"ST, 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 70 700 7.1 12.5 170 0 "CMOS sensor saturated, BP seen"
10 high 70 350 7.1 12.5 170 0 Having issues with beam requests (sharing between 2 gantries has commenced)
11 high 80 500 7.1 12.5 170 0 Couple 1000 off saturation
12 high 90 400 7.1 12.5 170 0 Saturation
13 high 100 350 7.1 12.5 170 0
14 high 110 300 7.1 12.5 170 0 Saturation
15 high 120 270 7.1 12.5 170 0 BP not captured in range
16 high 110 150 7.1 12.5 170 0
17 high 105 350 7.1 12.5 170 0 Saturated
18 high 100 200 7.1 12.5 170 0 Saturated
19 high 100 350 7.1 12.5 1000 0 Saturated
20 high 95 400 7.1 12.5 170 0 Saturated
21 high 90 200 7.1 12.5 170 0
22 high 90 400 7.1 12.5 1000 0
23 high 85 500 7.1 12.5 170 0 just missed saturation
24 high 80 250 7.1 12.5 170 0
25 high 80 500 7.1 12.5 1000 0
26 high 75 600 7.1 12.5 170 0
27 high 70 350 7.1 12.5 170 0
28 high 70 700 7.1 12.5 1000 0 pretty
29 clinical mode from now - scanned field
30 same field
31