skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Physics design of the next-generation spallation neutron target-moderator-reflector-shield assembly at LANSCE

Abstract

Here, we discuss the physics design of the next-generation spallation neutron target-moderator-reflector-shield (TMRS) assembly for the Manuel Lujan Jr. Neutron Scattering Center (Lujan Center) at the Los Alamos Neutron Science Center (LANSCE). We developed this TMRS to improve the neutronic performance of the Lujan Center in the intermediate energy range (keV–MeV) enabling a variety of new nuclear physics experiments, as well as increasing the quality of the ongoing experiments. The results of our Monte Carlo optimization study indicate that the new TMRS will generate keV–MeV neutrons with higher intensity and improved time resolution. At the same time, the new design largely maintains its current performance in the cold and thermal ranges supporting materials research. In this article we show that the new TMRS has the potential to enhance the Lujan Center’s experimental capability in a wider interval of energies – cold to intermediate – after its scheduled installation in 2020.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1459634
Report Number(s):
LA-UR-18-21681
Journal ID: ISSN 0168-9002
Grant/Contract Number:
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 901; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Accelerator Design; Technology and Operations; Spallation neutron generation; Neutron time-of-flight facility; MCNPX optimization study

Citation Formats

Zavorka, Lukas, Mocko, Michael Jeffrey, and Koehler, Paul E. Physics design of the next-generation spallation neutron target-moderator-reflector-shield assembly at LANSCE. United States: N. p., 2018. Web. doi:10.1016/j.nima.2018.06.018.
Zavorka, Lukas, Mocko, Michael Jeffrey, & Koehler, Paul E. Physics design of the next-generation spallation neutron target-moderator-reflector-shield assembly at LANSCE. United States. doi:10.1016/j.nima.2018.06.018.
Zavorka, Lukas, Mocko, Michael Jeffrey, and Koehler, Paul E. Fri . "Physics design of the next-generation spallation neutron target-moderator-reflector-shield assembly at LANSCE". United States. doi:10.1016/j.nima.2018.06.018.
@article{osti_1459634,
title = {Physics design of the next-generation spallation neutron target-moderator-reflector-shield assembly at LANSCE},
author = {Zavorka, Lukas and Mocko, Michael Jeffrey and Koehler, Paul E.},
abstractNote = {Here, we discuss the physics design of the next-generation spallation neutron target-moderator-reflector-shield (TMRS) assembly for the Manuel Lujan Jr. Neutron Scattering Center (Lujan Center) at the Los Alamos Neutron Science Center (LANSCE). We developed this TMRS to improve the neutronic performance of the Lujan Center in the intermediate energy range (keV–MeV) enabling a variety of new nuclear physics experiments, as well as increasing the quality of the ongoing experiments. The results of our Monte Carlo optimization study indicate that the new TMRS will generate keV–MeV neutrons with higher intensity and improved time resolution. At the same time, the new design largely maintains its current performance in the cold and thermal ranges supporting materials research. In this article we show that the new TMRS has the potential to enhance the Lujan Center’s experimental capability in a wider interval of energies – cold to intermediate – after its scheduled installation in 2020.},
doi = {10.1016/j.nima.2018.06.018},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 901,
place = {United States},
year = {Fri Jun 15 00:00:00 EDT 2018},
month = {Fri Jun 15 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on June 15, 2019
Publisher's Version of Record

Save / Share: