Update on Active RADMON sensors

1
Update on Active RADMON sensors

• Federico Ravotti
• (TS-LEA-CMS)
• Maurice Glaser Michael Moll
• (PH-TA1-SD)

2
Active Radiation Monitors

• new devices (D2) 0.4 mm oxide thickness
• Isochronal Characterization of all FET types
• ? under way!

RadFETs

• Investigation on thick devices for
• high sensitivity measurements
• ? under way!

p-i-n diodes
Optically Stimulated Luminescence (OSL)

• Annealing studies ? under way!
• Radiation Hardness problems with the Readout
  electronics ? under investigation!

3
RadFETs
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OSL on-line sensor
OSLB
OSLs deposed on GaAsP photodiodes for CERN sensor
?
OSL pure
OSL Paraffin
GaAsP OSL coupled with a NIR LED

• NIR LED ? known Radiation Hardness problems
• Diodes InGaAsP/InP 1050 nm under investigation!
• GaAsP photo-sensor ? unexpected Radiation
  Hardness problems
• ( 30 signal loss after 2x1013 Feq)
• Problem under investigation
• Research of new solutions.

5
Passive Radiation Monitors
Polymer-Alanine (PAD) Radio-Photo Luminescent
(RPL) Gafchromicâ Sensitive Films
Calibration campaign 2003 in the mixed g/n field
of CERN-PS IRRAD2 Facility (_at_ 50 cm from the beam
axis)
24 GeV/c protons (HD-810)
6
Readout parameters