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Irradiation of 300 m phi detectors from MICRON and HAMAMATSU cont. Second independent estimate: 6h 2 cycles, 12h 1 cycle, 14h no beam, 5.5h 1cycle estimated.

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Presentation on theme: "Irradiation of 300 m phi detectors from MICRON and HAMAMATSU cont. Second independent estimate: 6h 2 cycles, 12h 1 cycle, 14h no beam, 5.5h 1cycle estimated."— Presentation transcript:

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2 Irradiation of 300 m phi detectors from MICRON and HAMAMATSU cont. Second independent estimate: 6h 2 cycles, 12h 1 cycle, 14h no beam, 5.5h 1cycle estimated fluence by program assuming constant flux = real fluence / 1.37 Best estimate: real fluence = (1.5 +/- 10%) measured fluence Best estimate: real fluence = (1.5 +/- 10%) measured fluence

3 Irradiation of 300 m r detector from MICRON 12 July 18:30, Calibration of beam w/o detector SEC= , fluence = p/cm 2 F- factor = Estimate SEC= for p/cm 2 20:45, Start irradiation with detector 13 July 17:15, stop SEC= Highest fluence measured p/cm 2 F- factor = No complication with 1 and 2 cycles, only 30min stop of PS measured fluence is OK

4 Irradiation of 300 m phi detectors from MICRON and HAMAMATSU cont. Al for profile measurement and final calibration total time: 39h, first 6 h: 2 cycles, 14 h with no beam numbers given by program are completely unreliable Try to get correct estimate: Need to assume that the beam detector didnt changed, ( 2 cycles/ 1 cycle, shuttle problem, PS camera for beam steering ) 1. Add different calibrations: = p/cm / 2.8 = 1.6 ? (assumes Al foil for calibration was in the center of the beam) Correction for 6h 2cycles and 12h 1cycle on calibration 3: p/cm p/cm 2

5 Irradiation of 300 m phi detectors from MICRON and HAMAMATSU 26 July 16:55, Detectors + Al foils in beam First calibration 16: :15 SEC= , fluence = p/cm 2 F-factor = Second calibration 18: July 10:38 SEC= , fluence = p/cm 2 F-factor = !!!! (this calibration was used to define final SEC counts for p/cm 2 to be ) Third calibration 18: July 12:48 SEC= , fluence = p/cm 2 F-factor = (nobody noticed fluence > p/cm 2 ) Fourth calibration 28 July 2:33 - 8:12 SEC= , fluence = p/cm 2 F-factor = additional complications: First 6 h with 2 cycles, irradiation stopped 27 July 12: July 2:33

6 Irradiation of 200 m phi detector from MICRON 28 July 12:50, Detector + Al foils in beam Calibration starts at 14:26, SEC= Calibration stops at 16:05, SEC= measured fluence = p/cm 2 SEC = F-factor = (normal) wanted p/cm 2 SEC = instead goal set to: SEC = ! Explains factor 2 higher dose 29 July 13:32, irradiation stops, SEC = Minor correction: 5 hours 1 cycle, 19 hours 3 cycles real fluence 9% less than estimated by program divide all numbers by 1.09


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