Proton Calorimetry/Future Work: Difference between revisions
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''*Initially we will stick with a 10 cm x 10 cm field.'' | ''*Initially we will stick with a 10 cm x 10 cm field.'' | ||
==Scintillators and PD== | ==Scintillators and PD== | ||
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* FPGA from Saad had some glitches that need to be resolved. Do we see those with Nexus as well as the usb104? ➾ On board fitting needs to be implemented | * FPGA from Saad had some glitches that need to be resolved. Do we see those with Nexus as well as the usb104? ➾ On board fitting needs to be implemented | ||
==Calibration== | ==Calibration and data== | ||
Is it possible to calibrate the detector | Is it possible to calibrate the detector without a proton beam? | ||
* Maybe an e- beam beta source? | * Maybe an e- beam beta source? | ||
* Modify the geant4 simulation to verify what E will we need so there is no quenching? | * Modify the geant4 simulation to verify what E will we need so there is no quenching? | ||
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* How can we design the modules so they can attach and detach easily? ➾ We need a robust design but not rigid | * How can we design the modules so they can attach and detach easily? ➾ We need a robust design but not rigid | ||
* Power distribution? | * Power distribution? | ||
* Beam windows? | * Beam windows? Light tight? | ||
==Future beam tests== | ==Future beam tests== | ||
Latest revision as of 11:07, 21 September 2023
QuARC Goal
Measure the range of a 250 MeV proton beam with 0.1mm accuracy at 5 kHz, with no transverse position sensitivity in a 30 cm x 40 cm* field. The detector should be nozzle mounted and have all DAQ on board, with 1 power and 1 network connections to the outside world. It should be fully controlled by any web browser, and the GUI should include data review.
*Initially we will stick with a 10 cm x 10 cm field.
Scintillators and PD
- Scintillators uniform in thickness (3mm) and flatness.
- Machine block clear polished sheets.
- For 245 MeV, is it doable to do 1 module of 32 PD with the 2.8mm thick and then 3 modules of 32 PD with scintillators 3mm thick?
- For low energy just 1 module of 2.8mm
- Photodiodes are OK, there are no issues in the coupling.
DAQ & Electronics
Redesign of the analog circuit. The boards need a revision.
- We want everything to connect via usb-C (currently there is only one usb-C cable that does not work properly and it is a very long one). Did Saad discuss this with Marco? What was the outcome of the lab tests?
- We need all the power to come just from FPGA (5V, ~2A) ➾ the voltage regulator chips need to go.
- Long usb-C between the daugther board and the DDC will be removed, and the two can connect directly [daughter board - bridge usb C board - (usb C cable) - bridge board - DDC board]
- FPGA from Saad had some glitches that need to be resolved. Do we see those with Nexus as well as the usb104? ➾ On board fitting needs to be implemented
Calibration and data
Is it possible to calibrate the detector without a proton beam?
- Maybe an e- beam beta source?
- Modify the geant4 simulation to verify what E will we need so there is no quenching?
- Can we obtain average results to mitigate position sensitivity?
GUI
- Implement any options needed that have user input
- Replay and post-processing options
- Version with full live detector control ➾ reset and relaunch options included
- Check current varian control system: what does if offer and how do they control the detector? ➾ Check with Clatterbridge, Allison and A. Mazal
Mechanical design
- For 245 MeV, is it doable to do 1 module of 32 PD with the 2.8mm thick and then 3 modules of 32 PD with scintillators 3mm thick?
- How can we design the modules so they can attach and detach easily? ➾ We need a robust design but not rigid
- Power distribution?
- Beam windows? Light tight?
Future beam tests
- Beam test where we check the shape and position of the BP (scanning field)
- Real treatment plans
- Testing with real gantry mount