A Study of the Effect of Neutron Beam on $^{3}$He Spin Filters

ORAL

Abstract

A polarized $^{3}$He neutron spin filter has been used for the NPDGamma experiment at the FP12 beamline at LANSCE. During the experiment we observed a new, but currently unexplained effect of the neutron beam on the $^{3}$He polarization, leading to reductions of the $^{3}$He polarization of several percent. This effect is consistent with a rapid reduction of the average rubidium polarization, but could also be due to a reduction of the $^{3}$He relaxation rate. It is not known how the effect scales with neutron flux or flux density. Systematic studies of Rb and $^{3}$He polarization in the neutron beam are currently underway at LANSCE and the progress towards the understanding of this effect will be reported.

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Authors

  • Monisha Sharma

    • University of Michigan Ann Arbor

  • Libertad Barron-Palos

    • Arizona State University

  • Timothy E. Chupp

    • University of Michigan Ann Arbor

  • Christopher Crawford

    • University of Tennessee

  • Areg Danagoulian

    • Los Alamos National Laboratory

  • Thomas R. Gentile

    • National Institute of Standards and Technology

  • Gordon Jones

    • Hamilton College

  • Andreas Klein

    • Los Alamos National Laboratory

  • Bernhard Lauss

    • Institut Laue-Langevin

  • Seppo I. Penttila

    • Oak Ridge National Laboratory

  • Todd B. Smith

    • University of Dayton

  • Eric Tardiff

    • University of Michigan Ann Arbor

  • W. Scott Wilburn

    • Los Alamos National Laboratory