Physics and Engineering of Radiation Detection

5.2. Diamond Detectors 311

Figure 5.2.3: Variation of resistivity in dif-

ferent diamond crystals with respect to ab-

solute temperature (32).

and to read out the detector output. Common materials used for this purpose are
chromium-gold and titanium-gold alloys.
Fig.5.2.4 shows sketch of a simple diamond detector.

Vout

Diamond

Metal

Contacts

Incident

Radiation

+

+

+

+

−+

−

−

−

−

HV

Figure 5.2.4: Sketch of a sim-

ple diamond based detector.

Note that, in contrast to semi-

conductor detectors, there is

no depletion region.

5.2.F RadiationHardness

The main advantage of preferring diamond detectors over the semiconductor detec-
tors is their radiation hardness, that is, less vulnerability to radiation damage. It has
been found that the radiation hardness of the detectors made of CVD diamond is