ULTRA CAM Ion-Implanted-Silicon Detectors for Continuous Air Monitoring

ULTRA CAM
Ion-Implanted-Silicon Detectors
for Continuous Air Monitoring

Alpha and beta continuous air monitoring (counting in adverse environment)
Rugged and reliable
Ion-implanted front contact
Protective polymer front-contact coating
Low bias voltage
Advanced surface passivation for total device stability

Continuous air monitoring (CAM) instrumentation is used for counting, or rough-spectroscopy, on alpha particles from filters used with continuous air monitors. ULTRA CAM detectors set a new standard for silicon detectors for this purpose.

Since CAM instruments must work in air, exterior light, and under uncontrolled ambient conditions, the entrance contact of the ULTRA CAM detectors is coated with both an aluminum evaporation and a thin polymer film for protection against adverse environmental conditions, such as high humidity.

ULTRA CAM detectors have active areas ranging from 300 to 2000 mm². They operate at low voltage (+15 to 24 volts). This means that a separate HV supply is not required; the NIM +24 volt supply can be used for application of bias.

The alpha resolution that can be achieved is determined solely by the distance the alpha particles travel in air before reaching the detector. A U-CAM-450 in vacuum yielded an energy resolution on 5.47 MeV alphas of 35 keV FWHM.

The detectors are normally supplied in "B" mount, with a rear Microdot connector. Other mounting is available on request. (See mount descriptions.)

Ordering Information

Supplied with B Mount unless otherwise specified.

Active Area (mm²)	Minimum Depletion Depth 100 ľm* Model No.
300	U-CAM-300
450	U-CAM-450
600	U-CAM-600
900	U-CAM-900
1200	U-CAM-1200
2000	U-CAM-2000

*Deeper detectors available on special order