State of Health Preamplifier (SHP) is a low noise and fast resistive-feedback preliminary amplifier intended for operation within gamma- and X-ray Detection Unit based on HPGe detector.
SHP module allows to perform monitoring of detection unit basic parameters in real-time mode or per request of the operator. Analysis of the performance in the long run allows to predict possible failure of the detector and to perform timely preventive maintenance.
SHP module is specially designed to operate together with BSI HPGe detectors via USB interface. Adjustment of SHP parameters is performed through the software package developed specially for preventive maintenance and service activities.
| Parameter | Value |
|---|---|
| Energy range | from 3 keV to 10 MeV |
| Output signal polarity | negative |
| Output signal Rise time (µS) | ≤ 0.15 |
| Output signal fall time (µS) | ≥ 50 |
| Conversion Gain mV/MeV | 220-250 |
| Output Impedance (ohm) | 50 |
| Max constant input count rate Co-60 | 2x 105 cps |
| Preamplifier power supply is ±12 V with 9 pin connector compatible with NIM standards TTL signal to shut down the HV: - detector warm -0V; - detector cold: +5V - HV INHIBIT – BNC - Preamplifier and High voltage filter included - Automatic high-voltage shutdown to protect preamplifier input FET. 2 LEDs on the separate cable end from preamplifier: - GREEN – detector is cooled down - RED – high count rate | |
| Cable connectors: - 9 pin – PA Power supply; - 11 SHV - detector bias power supply; - BNC - signal output of detector, UART-TTL - USB. | |
| Indicator warns of excessive counting rate |
