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Title: Implementation of a small-angle scattering model in MCNPX for very cold neutron reflector studies

Abstract

Current neutron moderator media do not sufficiently moderate neutrons below the cold neutron regime into the very cold neutron (VCN) regime that is desirable for some physics applications. Nesvizhevsky et al [1] have demonstrated that nanodiamond powder efficiently reflect VCN via small angle scattering. He suggests that these effects could be exploited to boost the neutron output of a VCN moderator. Simulation studies of nanoparticle reflectors are being investigated as part of the development of a VCN source option for the SNS second target station. We are pursuing an expansion of the MCNPX code by implementation of an analytical small-angle scattering function [2], which is adaptable by scattering particle sizes, distributions, and packing fractions in order to supplement currently existing scattering kernels. The analytical model and preliminary studies using MCNPX will be discussed.

Authors:
ORCiD logo [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1456821
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 1021; Conference: International Collaboration on Advanced Neutron Sources (ICANS) - Oxford, , United Kingdom - 3/27/2017 4:00:00 AM-3/31/2017 4:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Grammer, Kyle B., and Gallmeier, Franz X. Implementation of a small-angle scattering model in MCNPX for very cold neutron reflector studies. United States: N. p., 2018. Web. doi:10.1088/1742-6596/1021/1/012060.
Grammer, Kyle B., & Gallmeier, Franz X. Implementation of a small-angle scattering model in MCNPX for very cold neutron reflector studies. United States. doi:10.1088/1742-6596/1021/1/012060.
Grammer, Kyle B., and Gallmeier, Franz X. Tue . "Implementation of a small-angle scattering model in MCNPX for very cold neutron reflector studies". United States. doi:10.1088/1742-6596/1021/1/012060. https://www.osti.gov/servlets/purl/1456821.
@article{osti_1456821,
title = {Implementation of a small-angle scattering model in MCNPX for very cold neutron reflector studies},
author = {Grammer, Kyle B. and Gallmeier, Franz X.},
abstractNote = {Current neutron moderator media do not sufficiently moderate neutrons below the cold neutron regime into the very cold neutron (VCN) regime that is desirable for some physics applications. Nesvizhevsky et al [1] have demonstrated that nanodiamond powder efficiently reflect VCN via small angle scattering. He suggests that these effects could be exploited to boost the neutron output of a VCN moderator. Simulation studies of nanoparticle reflectors are being investigated as part of the development of a VCN source option for the SNS second target station. We are pursuing an expansion of the MCNPX code by implementation of an analytical small-angle scattering function [2], which is adaptable by scattering particle sizes, distributions, and packing fractions in order to supplement currently existing scattering kernels. The analytical model and preliminary studies using MCNPX will be discussed.},
doi = {10.1088/1742-6596/1021/1/012060},
journal = {},
issn = {1742--6588},
number = ,
volume = 1021,
place = {United States},
year = {2018},
month = {5}
}

Conference:
Other availability
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