Nuclear radiation
Semiconductor detectors
and Associated electronics

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

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

Detector

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

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

Usage

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