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

Journal Article · · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
 [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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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.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-06NA253996
OSTI ID:
1234428
Alternate ID(s):
OSTI ID: 1397581
Report Number(s):
LA-UR-15-25422; PII: S016890021501579X
Journal Information:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 810, Issue C; ISSN 0168-9002
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (3)

The Los Alamos Neutron Science Center
  • 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 https://doi.org/10.1016/j.nima.2006.02.178
journal June 2006
Fourth-generation spallation neutron target-moderator-reflector-shield assembly at the Manuel Lujan Jr. neutron scattering center journal March 2013
Molecular interactions in the condensed phases of ortho-para hydrogen mixtures journal July 1975

Cited By (1)

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

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Related Subjects

43 PARTICLE ACCELERATORS
ortho-para hydrogen
Raman spectroscopy
fiber-optic
accelerator target
neutron spallation source