Subminiature Spectrometric Detection Probe

SDP 313

The Spectrometric Detection Probe SDP 313 is a subminiature gamma-ray detection device consisting of removable probe and attached cable with connectors. Removable probe contains a single small size CdZnTe quasi-hemispherical detector and charge sensitive preamplifier placed in a watertight housing connected to a cable. Modifications of SDP 313 probes, which differ in used detectors sizes, spectroscopy performance, cable length and connectors types are available.

These probes have been designed for application in difficult of access places. The main feature of this probe is a very small external diameter, 6 mm only.

Features

Very small dimensions
High energy resolution
Room temperature operation
Small consumption power

Applications

High-activity nuclear materials verification
Spectrometric nuclear power plant monitoring
Measurements in high intensity gamma-radiation fields
Nuclear waste treatment facilities
Measurements in places of difficult access

Specifications

Detector

Type CdZnTe quasi-hemispherical detector
Volume 1 … 10 mm3
High voltage up to 500 V
High voltage polarity positive

Basic

Energy resolution at 662 keV < 22 keV
Conversion coefficient > 0.1 mV / keV
Integral nonlinearity 60 keV … 1.3 MeV) < 0.2%
Range of recommended operation temperature 0 to 40 °C
Shift peak position in range of recommended operation temperature < 0.02% / °C
Shift peak position for 8 hours of continuous operation < 0.2%
Power requirements +5 V, 5 mA; -5 V, 4 mA

Output

Signal polarity negative
Impedance 50 Ω
Signal rise time < 250 ns

Dimensions

Length of removable probe 63 mm
Diameter of removable probe 6 mm
Standard length of connecting cable 20 cm
Maximal length of connecting cable up to 20 m
Diameter of connecting cable 4 mm

Connectors

single 5-pin LEMO connector
multiple
- low voltage 9-pin connector D9 type
- output BNC
- detector high voltage SHV