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Introduction to
Charged-Particle Detectors Radiation Damage
The table below shows threshold doses for radiation damage with different
types of charged particles.
Table 2. Effects of
Radiation Damage in Silicon Detectors. |
Threshold Doses (particles/cm2 ) |
| Electrons |
Fast Neutrons |
Protons |
Alpha Particles |
Fission Fragments |
| 1013 |
1012 |
1010 |
109 |
108 |
The symptoms of radiation damage are: higher leakage
current/noise followed by peak broadening and, sometimes, double peaking. In
order to prolong the usable "life" of a detector in a radiation field
causing damage, the detector must be kept cold (any cooling below room
temperature helps; ideally the detector should be cooled to –60°C). |
