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Gamma Flash (LaBr 3 and LaCl 3 )

Gamma Flash (LaBr 3 and LaCl 3 ). Emilio Mendoza Cembranos. Energy calibration. Calibration measurements at 0.1 V full range: LaCl 3 – 137 Cs-25, 88 Y-35,73  ~25 keV/channel LaBr 3 – 137 Cs-17, 88 Y-24,48  ~37 keV/channel

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Gamma Flash (LaBr 3 and LaCl 3 )

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  1. Gamma Flash (LaBr3 and LaCl3) Emilio Mendoza Cembranos

  2. Energy calibration Calibration measurements at 0.1 V full range: LaCl3 – 137Cs-25, 88Y-35,73  ~25 keV/channel LaBr3 – 137Cs-17, 88Y-24,48  ~37 keV/channel Rest of measurements presented here with 1 V full range instead of 0.1 V  ~250, 370 keV/channel Same voltage applied to the detectors

  3. Example - normal proton intensity, with shifter Always the same shape Always a strange shape

  4. Conclusions • At normal proton intensities, with shifter, the g-flash seems to saturate. • If the gamma flash saturates, the shifter makes something strange. •  Only runs without shifter can be considered.

  5. Runs without shifter “Good” statistics No g-flash Bad statistics

  6. 42 cm 22 cm Corner

  7. No shifter, normal intensity x0.1, 22 cm 20 MeV

  8. No shifter, normal intensity x0.1, 22 cm 20 MeV

  9. No shifter, normal intensity x0.1, 22 cm

  10. No shifter, normal intensity x0.1, 22 cm 1 GeV 20 GeV 5 GeV

  11. No shifter, normal intensity x0.1, 42 cm 1 GeV 20 GeV 5 GeV

  12. No shifter, normal intensity x0.1, corner 1 GeV 20 GeV 5 GeV

  13. No shifter, normal intensity x0.7, corner 1 GeV 20 GeV 5 GeV

  14. No shifter, normal intensity x0.1, 22 cm No g-flash Saturated g-flash

  15. No shifter, normal intensity x0.1, 42 cm No g-flash Saturated g-flash

  16. No shifter, normal intensity x0.1, corner No g-flash Saturated g-flash

  17. No shifter, normal intensity x0.7, corner No g-flash Saturated g-flash

  18. LaBr3 LaCl3 LaBr3 LaCl3 LaBr3 LaCl3 LaBr3 LaCl3

  19. Conclusions • More protons  more g-flash • For this measurements, the g-flash is compatible in all spatial positions. • In these measurements (nominal intensity x0.1) one or two particles deposit up to ~100 MeV (or more) in these detectors. • Information very limited: It would be nice to make extra measurements (low proton intensity + without shifter to compare with the simulations).

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