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Title: Stilbene Scintillator Detector Array and Data-Acquisition System for Active Interrogation

Abstract

A large area Stilbene crystal detector array has been assembled and calibrated for use in active interrogation measurements. The array consists of 10 high-efficiency 4”x2” stilbene cells. The cells were grown by Inrad Optics using LLNL developed technology. The array can be used to detect multiple signatures of SNM items, both actively and passively. Prompt and delayed gamma rays as well as prompt and delay neutrons can be detected and counted separately. The array is coupled to the Mesytec MDPP-16 VME-based digitizer module for data acquisition. This module performs on-board pulse-shape discrimination of signals from the Stilbene crystal detectors. This data-acquisition module allows separation of neutron and gamma-ray events with a low demand on data transfer rates. In addition, the high-resolution timing (<100 ps) is suitable for correlated gamma-ray and neutron multiplicity counting. This report describes the construction and calibration of the system. We also discuss applications of the system as well as how the system is currently being utilized by end users.

Authors:
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1469447
Report Number(s):
LLNL-TR-757673
945161
DOE Contract Number:  
AC52-07NA27344
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION

Citation Formats

Kerr, Phillip, and Mozin, Vladimir. Stilbene Scintillator Detector Array and Data-Acquisition System for Active Interrogation. United States: N. p., 2018. Web. doi:10.2172/1469447.
Kerr, Phillip, & Mozin, Vladimir. Stilbene Scintillator Detector Array and Data-Acquisition System for Active Interrogation. United States. doi:10.2172/1469447.
Kerr, Phillip, and Mozin, Vladimir. Tue . "Stilbene Scintillator Detector Array and Data-Acquisition System for Active Interrogation". United States. doi:10.2172/1469447. https://www.osti.gov/servlets/purl/1469447.
@article{osti_1469447,
title = {Stilbene Scintillator Detector Array and Data-Acquisition System for Active Interrogation},
author = {Kerr, Phillip and Mozin, Vladimir},
abstractNote = {A large area Stilbene crystal detector array has been assembled and calibrated for use in active interrogation measurements. The array consists of 10 high-efficiency 4”x2” stilbene cells. The cells were grown by Inrad Optics using LLNL developed technology. The array can be used to detect multiple signatures of SNM items, both actively and passively. Prompt and delayed gamma rays as well as prompt and delay neutrons can be detected and counted separately. The array is coupled to the Mesytec MDPP-16 VME-based digitizer module for data acquisition. This module performs on-board pulse-shape discrimination of signals from the Stilbene crystal detectors. This data-acquisition module allows separation of neutron and gamma-ray events with a low demand on data transfer rates. In addition, the high-resolution timing (<100 ps) is suitable for correlated gamma-ray and neutron multiplicity counting. This report describes the construction and calibration of the system. We also discuss applications of the system as well as how the system is currently being utilized by end users.},
doi = {10.2172/1469447},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}