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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

Gamma Flash (LaBr3 and LaCl3)

Emilio Mendoza Cembranos

energy calibration
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

example normal proton intensity with shifter
Example - normal proton intensity, with shifter

Always the same shape

Always a strange shape

conclusions
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.
runs without shifter
Runs without shifter

“Good” statistics

No g-flash

Bad statistics

slide6

42 cm

22 cm

Corner

slide14

No shifter, normal intensity x0.1, 22 cm

No g-flash

Saturated g-flash

slide15

No shifter, normal intensity x0.1, 42 cm

No g-flash

Saturated g-flash

slide18

LaBr3

LaCl3

LaBr3

LaCl3

LaBr3

LaCl3

LaBr3

LaCl3

conclusions1
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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