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Title: Simulation of high-pressure micro-capillary 3He counters

Abstract

Low-pressure (1–4 atm) cylindrical 3He counters are widely used as neutron detectors. These detectors are relatively large (1–2.5 cm diameter) and can be subject to noise induced by microphonics. Meanwhile, new advancements in micro-fabrication are enabling the manufacture of high-pressure (over 3000 atm) micro-capillaries (~100 µm diameter). Can these micro-capillaries be used as accurate and high-efficiency 3He counters? To answer these questions, we have developed a mathematical model/computer simulation. Our model shows that such capillaries have the potential for being high-efficiency neutron spectrometers capable of resolving not only energy, but also angle of incidence for fixed sources. Finally, we benchmark the model against published results and extrapolate spectra to the pressures of interest.

Authors:
 [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1426965
Report Number(s):
SAND-2007-1296J
Journal ID: ISSN 0954-3899; 526741
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. G, Nuclear and Particle Physics
Additional Journal Information:
Journal Volume: 35; Journal Issue: 11; Journal ID: ISSN 0954-3899
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Martin, Shawn Bryan, Chandler, Gordon, and Derzon, Mark Steven. Simulation of high-pressure micro-capillary 3He counters. United States: N. p., 2008. Web. doi:10.1088/0954-3899/35/11/115103.
Martin, Shawn Bryan, Chandler, Gordon, & Derzon, Mark Steven. Simulation of high-pressure micro-capillary 3He counters. United States. doi:10.1088/0954-3899/35/11/115103.
Martin, Shawn Bryan, Chandler, Gordon, and Derzon, Mark Steven. Fri . "Simulation of high-pressure micro-capillary 3He counters". United States. doi:10.1088/0954-3899/35/11/115103. https://www.osti.gov/servlets/purl/1426965.
@article{osti_1426965,
title = {Simulation of high-pressure micro-capillary 3He counters},
author = {Martin, Shawn Bryan and Chandler, Gordon and Derzon, Mark Steven},
abstractNote = {Low-pressure (1–4 atm) cylindrical 3He counters are widely used as neutron detectors. These detectors are relatively large (1–2.5 cm diameter) and can be subject to noise induced by microphonics. Meanwhile, new advancements in micro-fabrication are enabling the manufacture of high-pressure (over 3000 atm) micro-capillaries (~100 µm diameter). Can these micro-capillaries be used as accurate and high-efficiency 3He counters? To answer these questions, we have developed a mathematical model/computer simulation. Our model shows that such capillaries have the potential for being high-efficiency neutron spectrometers capable of resolving not only energy, but also angle of incidence for fixed sources. Finally, we benchmark the model against published results and extrapolate spectra to the pressures of interest.},
doi = {10.1088/0954-3899/35/11/115103},
journal = {Journal of Physics. G, Nuclear and Particle Physics},
number = 11,
volume = 35,
place = {United States},
year = {2008},
month = {9}
}

Journal Article:
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