The GEMPix detector

just class report

Transcript

1. The GEMPix detector Radiation Measurements Volume 138, November 2020, 106421 F.Murtas slides：TYL
2. OVERVIEW
3. Introduction
4. Introduction • GEMPix detector • GEM • Timepix ASICs
5. GEMPix detector
6. 1. FITPix 2. Temperature / Pressure / Humidity sensor 3. Timepix ASICs x4 4. Kapton foil 5. GEM covered with copper GEMPix detector
7. GEMPix detector
8. • GEM(Gas Electron Multiplier) • Timepix ASICs + FITPix GEMPix detector
9. • 50 µm kapton foil • copper cladded • chemically perforated • diameter 70 µm (50 µm) • pitch of 140 µm • voltage difference • 400 ~ 500 V • 100 kV/cm inside the holes • maximum gain by single GEM • 103 GEM(Gas Electron Multiplier)
10. • The last GEM induces a signal on the chip • Collect mode • Medipix mode • Time-over-Threshold • Time-of-Arrival • FITPix (FPGA module) • Pixelman software Timepix ASICs
11. Timepix ASICs
12. Particle Detection Studies and Microdosimetry
13. • CERF facility at CERN • Proton and Pion • Momenta of 120 gev / c • Drift volume 3 x 3 x 1.2 cm3 Particle Detection Studies and Microdosimetry
14. • The first version of Timepix ASIC cannot simultaneously measure deposited charge ToT and ToA • Mixed Mode：1 in every 16 pixels measure ToA while the rest measure ToT Mixed Mode
15. • 15 out of 16 pixels measure ToT • 1 out of 16 measure ToA Track Incident at 30。 Measured in Mixed Mode Operation
16. • Removing the need for a mixed mode • Time resolution：1.5ns • Maximum data throughput rate：85m hits / s Timepix3 ASIC
17. • Through-silicon-via (TSV) technology • Without dead spaces Timepix4
18. Timepix 3→4
19. Dosimeter in Hadron Therapy And Radio Therapy
20. • CNAO, the italian centre for oncological hadrontherapy in pavia • Synchrotron • Proton beam • Carbon ion beam Measurements
21. GEMPix mounted on water phantom The GEMPix inside water PMMA box mounted on the water phantom
22. • Pencil beam • Carbon ions KE • 280MeV/u • 332 MeV/u • Bragg peak at 147 mm • 3D reconstruction of the energy deposition (Fig. up) • the comparison with the commercial Peakfinder (Fig. down) GEMPix mounted on water phantom
23. • high flux of gammas • the comparison of the GEMpix and film in 10 min GEMPix detector used to dosimetry measurements in radiotherapy
24. 55-Fe Dosimetry in Radioactive Waste
25. • The energy released by 6kev x-ray • 45 samples • sensitivity：30 Bq/g 55-Fe content in radioactive waste sample
26. GEMPix as X-ray Monitoring Burning Plasma Physics
27. • image of the plasma • pin-hole system • Timepix：ToT mode GEMPix in Soft X-ray Emitted by Laser Produced Plasmas
28. • Measure the x-ray fluxes as a function of the energy • plasma pileup of the charge in front of Timepix's pixel • The central spots with no filters (normalization) The GEMPix With Different Thickness of Alluminum Filters Placed in Front of The Detector
29. Conclusions
30. • The gempix is a reliable detector • Study in the detection efficiency of thermal neutron and ions • Shown good performance measuring the characteristics of high intensity beam in cancer treatment • Monitoring of plasmas using the soft x-ray not visible by room temperature silicon detector Conclusions
31. Thanks
32. • F.Murtas et al., 2020, The GEMPix detector. • Johannes Leidner, Fabrizio Murtas and Marco Silari, 2021, Medical Applications of the GEMPix. • G. Claps, D. Pacella, et al., 2016, The GEMpix detector as new soft X-rays diagnostic tool for laser produced plasmas. Reference