TY  - CONF
AU  - Babcock, Earl
AU  - Salhi, Zahir
AU  - Barnsley, Lester
AU  - Voigt, Jörg
AU  - Mattauch, Stefan
AU  - Ioffe, Alexander
TI  - µ -metal magnetic cavities for polarization and maintenance of polarization of 3 He gas
JO  - Journal of physics / Conference Series
VL  - 1316
IS  - 1
SN  - 1742-6588
CY  - Bristol
PB  - IOP Publ.87703
M1  - FZJ-2019-06852
SP  - 012019
PY  - 2019
AB  - 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.
T2  - 12th International Conference on Polarised Neutrons for Condensed Matter Investigations
CY  - 3 Jul 2018 - 6 Jul 2018, Abingdon, UK (UK)
Y2  - 3 Jul 2018 - 6 Jul 2018
M2  - Abingdon, UK, UK
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8
UR  - <Go to ISI:>//WOS:000562316600019
DO  - DOI:10.1088/1742-6596/1316/1/012019
UR  - https://juser.fz-juelich.de/record/868302
ER  -