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

Journal Article · Thu Dec 17 00:00:00 EST 2015 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2015.12.009· OSTI ID:1234428

Sutherland, Liese -Marie ^[1]; Knudson, James N. ^[1]; Mocko, Michal ^[1]; Renneke, Richard M. ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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 Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE; USDOE National Nuclear Security Administration (NNSA)
• OSTI ID: 1234428
• Alternate ID(s): OSTI ID: 22561817; 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, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: C Vol. 810; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

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