Measured spectral brightness of the HFIR supercritical hydrogen cold source

J. L. Robertson, E. B. Iverson

Research output: Contribution to journalReview articlepeer-review

5 Scopus citations

Abstract

The High Flux Isotope Reactor (HFIR) resumed operation in June of 2007 with the ability to produce world-class cold neutron beams for research after the addition of a super-critical hydrogen cold source. Neutron scattering instruments that view the cold source receive a neutron spectrum where the number of neutrons with wavelengths greater than 4Å is greatly enhanced. Four neutron guides begin near the exit of the HB-4 beamtube and transport the long wavelength neutrons out into the recently constructed cold neutron guide hall. In September of 2007 the first few sections of guide closest to the HB-4 beamtube were temporarily removed for component upgrades. This provided an opportunity to measure the neutron spectrum directly from the cold moderator without passing through the intervening neutron guides. This report describes the results of that measurement.

Original languageEnglish
Pages (from-to)17-19
Number of pages3
JournalNeutron News
Volume19
Issue number3
DOIs
StatePublished - Jul 2008

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