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PA-100 Detector

The PA-100 is an alpha detector designed for surface monitoring of alpha contamination. The detector contains a highly efficient air proportional sensor and electronic circuits. Power is supplied by the RAM DA 2000 monitor and output is in TTL-shaped pulses with a rate proportional to the radiation contamination. The detector has a low background count rate and is easy to decontaminate. The sensor contains atmospheric cells made of aluminum containing a thin anode wire. The surface of the cell is a membrane of aluminiumized Mylar, protected by a fine stainless steel wire mesh.

The detector contains a high voltage power supply, calibrated discriminator, linear pulse amplifier, pulse shaper, GM saturation indicator, detector identifier and malfunction detection circuitry. This configuration minimizes noise, improving sensitivity and stability. The detector also holds a replaceable cartridge filled with hygroscopic silica gel for the reduction of humidity in the sensor.

Specifications

Sensitive area:		100 cm² (15.5sq.in.)
Window Thickness:		0.85mg/cm² aluminized window
Probe Efficiency (2π):		18% (related to ²⁴¹Am)
Surface Sensitivity:		530cpm/Bq/cm²*
Accuracy:		±15% of reading (related to ²⁴¹Am)
Maximum count rate:		3 x 10⁶cpm
Output Signals:		TTL pulses. Detector status: ID, OK, malfunction
Temperature Range:		Operation: -10^oC to +50^oC (15^oF - 122^oF) Storage: -20^oC to +60^oC (-5^oF - 140^oF)
Humidity Range:		40% to 95% RH (non condensing)
Dimensions:		240mm (9.5") length, 75mm (3") width, 55mm (2.2") height
Weight:		1kg (2.2lbs)
Casing:		Aluminum, splash proof

* When operated with the RAM DA 2000 monitor, the probe efficiency (2p), is compensated to 100% by the monitor, so that surface sensitivity, using a large homogeneous ²⁴¹Am source, will be approximately 3000 cpm/Bq/cm².

Ordering Information

PA-100 - Air Proportional (100 sq. cm.) BAK-1330

Note: Specifications subject to change without notice.