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Title: Practical in-situ determination of ortho-para hydrogen ratios via fiber-optic based Raman spectroscopy

Abstract

An experiment was designed and developed to prototype a fiber-optic-based laser system, which measures the ratio of ortho-hydrogen to para-hydrogen in an operating neutron moderator system at the Los Alamos Neutron Science Center (LANSCE) spallation neutron source. Preliminary measurements resulted in an ortho to para ratio of 3.06:1, which is within acceptable agreement with the previously published ratio. As a result, the successful demonstration of Raman Spectroscopy for this measurement is expected to lead to a practical method that can be applied for similar in-situ measurements at operating neutron spallation sources.

Authors:
 [1];  [1];  [1];  [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:
1234428
Alternate Identifier(s):
OSTI ID: 1397581
Report Number(s):
LA-UR-15-25422
Journal ID: ISSN 0168-9002; PII: S016890021501579X
Grant/Contract Number:  
AC52-06NA253996
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 810; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ortho-para hydrogen; Raman spectroscopy; fiber-optic; accelerator target; neutron spallation source

Citation Formats

Sutherland, Liese -Marie, Knudson, James N., Mocko, Michal, and Renneke, Richard M. Practical in-situ determination of ortho-para hydrogen ratios via fiber-optic based Raman spectroscopy. United States: N. p., 2015. Web. doi:10.1016/j.nima.2015.12.009.
Sutherland, Liese -Marie, Knudson, James N., Mocko, Michal, & Renneke, Richard M. Practical in-situ determination of ortho-para hydrogen ratios via fiber-optic based Raman spectroscopy. United States. https://doi.org/10.1016/j.nima.2015.12.009
Sutherland, Liese -Marie, Knudson, James N., Mocko, Michal, and Renneke, Richard M. Thu . "Practical in-situ determination of ortho-para hydrogen ratios via fiber-optic based Raman spectroscopy". United States. https://doi.org/10.1016/j.nima.2015.12.009. https://www.osti.gov/servlets/purl/1234428.
@article{osti_1234428,
title = {Practical in-situ determination of ortho-para hydrogen ratios via fiber-optic based Raman spectroscopy},
author = {Sutherland, Liese -Marie and Knudson, James N. and Mocko, Michal and Renneke, Richard M.},
abstractNote = {An experiment was designed and developed to prototype a fiber-optic-based laser system, which measures the ratio of ortho-hydrogen to para-hydrogen in an operating neutron moderator system at the Los Alamos Neutron Science Center (LANSCE) spallation neutron source. Preliminary measurements resulted in an ortho to para ratio of 3.06:1, which is within acceptable agreement with the previously published ratio. As a result, the successful demonstration of Raman Spectroscopy for this measurement is expected to lead to a practical method that can be applied for similar in-situ measurements at operating neutron spallation sources.},
doi = {10.1016/j.nima.2015.12.009},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 810,
place = {United States},
year = {2015},
month = {12}
}

Works referenced in this record:

The Los Alamos Neutron Science Center
journal, June 2006

  • Lisowski, Paul W.; Schoenberg, Kurt F.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 562, Issue 2
  • DOI: 10.1016/j.nima.2006.02.178

Fourth-generation spallation neutron target-moderator-reflector-shield assembly at the Manuel Lujan Jr. neutron scattering center
journal, March 2013

  • Mocko, M.; Muhrer, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 704
  • DOI: 10.1016/j.nima.2012.11.103

Molecular interactions in the condensed phases of ortho-para hydrogen mixtures
journal, July 1975


Works referencing / citing this record:

Quantitative In Situ Monitoring of Parahydrogen Fraction Using Raman Spectroscopy
journal, September 2018