%0 Conference Paper
%A Babcock, Earl
%A Salhi, Zahir
%A Barnsley, Lester
%A Voigt, Jörg
%A Mattauch, Stefan
%A Ioffe, Alexander
%T µ -metal magnetic cavities for polarization and maintenance of polarization of 3 He gas
%J Journal of physics / Conference Series
%V 1316
%N 1
%@ 1742-6588
%C Bristol
%I IOP Publ.87703
%M FZJ-2019-06852
%P 012019
%D 2019
%X Low gradient magnetic holding fields are required for maintaining the polarization of polarized 3He, as diffusion though non-ideal gradients can cause total relaxation rates much greater than the intrinsic total 3He relaxation rate of a particular 3He cell in optimal conditions. For neutron scattering applications we often rely on µ-metal cavities to provide a degree of shielding from the many other sources of magnetic fields and gradient experienced on a typical neutron instrument. The JCNS utilizes two concepts for such cavities, one based on inexpensive plastic-bonded magnets to provide magnetic flux, and the other based on field coils wound on the sides of the µ-metal cavity. 2 different sized of permanent magnet cavities and three different geometries of coil-based cavities have been produced. Both types of boxes will be presented with magnetic design as well as mechanical construction details along with the achieved performance of the constructed devices.
%B 12th International Conference on Polarised Neutrons for Condensed Matter Investigations
%C 3 Jul 2018 - 6 Jul 2018, Abingdon, UK (UK)
Y2 3 Jul 2018 - 6 Jul 2018
M2 Abingdon, UK, UK
%F PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
%9 Journal ArticleContribution to a conference proceedings
%U <Go to ISI:>//WOS:000562316600019
%R 10.1088/1742-6596/1316/1/012019
%U https://juser.fz-juelich.de/record/868302