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North Penn Business Park,
4500 North Cannon Ave. Lansdale, PA
19446, USA
Tel No.: (267) 436-3991
Fax: (215) 362-5343

CRAIG MILLS:
Email id: cmills@apantec.com
Tel No.:267-436-4034
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Providing Innovative Engineering Solutions for Radiation MonitoringProviding Innovative Engineering Solutions for Radiation Monitoring Providing Innovative Engineering Solutions for Radiation Monitoring
SD-Series Scintillation Detectors
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SD-Series Scintillation Detectors

Apantec has developed the SD series of scintillation detectors for use in process monitoring systems. The SD series detectors include a scintillator, photomultiplier tube, mu-metal shield, dynode chain, and Lucite light pipe in a cylindrical enclosure. A light emitting diode (LED) is located in the Lucite light pipe for automatic gain control. A temperature sensor located within the Lucite light pipe provides a temperature signal for temperature compensation. The detector housing is 2.5” in diameter x 7 inches long. The scintillation material is selected based on the type(s) of radiation to be measured.

A separate preamplifier/analyzer enclosure located in proximity to the detector is used to perform several functions. The preamplifier provides operating voltage to the associated scintillation detector for detector operation. A closed loop feedback control circuit in the preamplifier/analyzer provides automatic gain stabilization of the scintillation detector, correcting for variations in gain due to temperature, aging and power supply drift. Finally, the preamplifier/analyzer enclosure includes a SCA circuit which can be set to integrate up to three specific regions of interest when used for gamma applications, or set to operate in gross counting mode.

An optional MCA with full 1024 channel gamma spectrum can also be provided for more detailed analysis. The preamplifier/analyzer enclosure is provided with a NEMA4 rating and is designed for mounting to a flat surface. The detector is interconnected to the preamplifier/analyzer enclosure using a four foot long (nominal) cable. Ethernet communication is used for interconnection to the local display and control unit. The interconnection cables are provided fully assembled and tested.
Extended range scintillation detectors are also available using the Apantec process, which measures the current output from the detector in high fields. The detector circuitry automatically switches from pulse counting mode to current mode.
All SD series detectors are provided fully calibrated to NIST standards.
SD Series Detectors:
Model Crystal Size Radiation Measured Temperature
SD115N NaI 1” x 1.5” Gamma –10 °C to +50 °C
SD220N NaI 2” x 2” Gamma –10 °C to +50 °C
SD115NH NaI 1” x 1.5” Gamma –10 °C to +90 °C
SD220BH BGO 2” x 2” Gamma –10 °C to +150 °C
SD201PB NE102 2” x 0.01” Beta –10 °C to +50 °C
  BGO ¼” cube Gamma –10 °C to +50 °C
Note: Other crystal sizes, crystal combinations, temperature ratings and extended range detectors are available. Please consult the factory
SPECIFICATIONS
DYNAMIC RANGE: 1E+0 to 1E+7 CPM (wide range optional)
DETECTOR OUTPUT: Negative Pulse.
DETECTOR ACCURACY:

±15% of true field intensity.

DETECTOR LINEARITY: ±5%.
OPERATING VOLTAGE: 500 to 1500 V
NOMINAL LED BACKGROUND: 10–15 CPM.
OPERATING HUMIDITY: 0–95% non-condensing.
HOUSING: Moisture Proof Stainless Steel.
WEIGHT: 2.7 kg (5 lb).
Quality:
The SD Series detectors are designed and manufactured under a quality system in compliance with the following standards and requirements:
  • 10CFR21
  • 10CFR50, Appendix “B”
  • IEEE-730
  • ANSI/ASME NQA-1, ANSI/ASME NQA-2, Part 2.7
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