TY  - JOUR
AU  - mcKetterick, T.J.
AU  - Boag, S.
AU  - Stewart, J.R.
AU  - Frost, C.D.
AU  - Skoda, M.W.A.
AU  - Parnell, S.
AU  - Babcock, E.
TI  - Optimised adiabatic fast passage spin flipping for (3)He neutron spin filters
JO  - Physica / B
VL  - 406
SN  - 0921-4526
CY  - Amsterdam
PB  - North-Holland Physics Publ.
M1  - PreJuSER-18351
SP  - 2436 - 2438
PY  - 2011
N1  - Record converted from VDB: 12.11.2012
AB  - We describe here a method of performing adiabatic fast passage (AFP) spin flipping of polarized He-3 used as a neutron spin filter (NSF) to polarize neutron beams. By reversing the spin states of the He-3 nuclei the polarization of a neutron beam can be efficiently reversed allowing for the transmission of a neutron beam polarized in either spin state. Using an amplitude modulated frequency sweep lasting 500 ms we can spin flip a polarized He-3 neutron spin filter with only 1.8 x 10(-5) loss in He-3 polarization. The small magnetic fields (10-15 G) used to house neutron spin filters mean the He-3 resonant frequencies are low enough to be generated using a computer with a digital 110 card. The versatility of this systems allows AFP to be performed on any beamline or in any laboratory using He-3 neutron spin filters and polarization losses can be minimised by adjusting sweep parameters. (C) 2010 Elsevier B.V. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000291889400029
DO  - DOI:10.1016/j.physb.2010.11.088
UR  - https://juser.fz-juelich.de/record/18351
ER  -