000002019 001__ 2019
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000002019 0247_ $$2DOI$$a10.1016/j.nima.2008.10.009
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000002019 0247_ $$2MLZ$$aParnell2009
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000002019 082__ $$a530
000002019 084__ $$2WoS$$aInstruments & Instrumentation
000002019 084__ $$2WoS$$aNuclear Science & Technology
000002019 084__ $$2WoS$$aPhysics, Particles & Fields
000002019 084__ $$2WoS$$aSpectroscopy
000002019 1001_ $$0P:(DE-HGF)0$$aParnell, S.R.$$b0
000002019 245__ $$aStudy of spin-exchange optically pumped 3He cells with high polarisation and long lifetimes
000002019 260__ $$aAmsterdam$$bNorth-Holland Publ. Co.$$c2009
000002019 300__ $$a774 - 778
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000002019 440_0 $$04642$$aNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment$$v598$$x0168-9002$$y3
000002019 500__ $$aThe authors would like to thank Dr. T. Gentile for loan of the cell Lion and feedback on this work. Dr. A. loffe for useful discussions and O. Lykhvar for technical support during our experiments at FRM-2. This research project has been supported by EPSRC [EP/D070252/1], STFC [CC/DO00130/1] and the European Commission under the 6<SUP>th</SUP> Framework Programme through the Key Action: Strengthening the European Research Area, Research Infrastructures. Contract no: RII3-CT-2003-505925.
000002019 520__ $$aWe present a detailed investigation in to He-3 neutron spin filter cells polarised by spin exchange optical pumping (SEOP). We include measurements of the absolute He-3 polarisation using neutron transmission and characterisation of both the X-factor and He-3 relaxation times (T-1) for a number of cells. For one cell we calculated a Maximum He-3 polarisation of 79% with a T, of 633 h. The measured X-factor of this cell, X = 0.17 +/- 0.01, is low. For all cells polarisations of > 71% are observed. In addition we present He-3 relaxation data for a new design of magneto-static cavity with a field of high homogeneity Delta B/B-0 approximate to 3.5 x 10(-4) cm(-1). This compact device provides a magnetic field in an orientation suitable for in situ optical pumping that minimises the field inhomogeneity contribution to the T, to 930h in a 1 bar cell, the longest reported on beam thus far. The results suggest that high He-3 polarisation with long relaxation times can now be routinely obtained with SEOP, enabling time independent incident beam polarisation to be easily implemented across many different neutron Scattering instruments. (c) 2008 Elsevier B.V. All rights reserved.
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000002019 65320 $$2Author$$aNeutron spin filter
000002019 65320 $$2Author$$aNuclear spin polarised He-3
000002019 65320 $$2Author$$aNeutron scattering
000002019 65320 $$2Author$$aNMR
000002019 65320 $$2Author$$aMagnetostatic cavity
000002019 650_7 $$2WoSType$$aJ
000002019 693__ $$0EXP:(DE-MLZ)MIRA-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)MIRA-20140101$$6EXP:(DE-MLZ)NL6N-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz$$eMIRA: Multipurpose instrument$$fNL6N$$x0
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000002019 7001_ $$0P:(DE-Juel1)VDB80920$$aBabcock, E.$$b1$$uFZJ
000002019 7001_ $$0P:(DE-Juel1)VDB79195$$aNüninghof, K.$$b2$$uFZJ
000002019 7001_ $$0P:(DE-HGF)0$$aSkoda, M. W. A.$$b3
000002019 7001_ $$0P:(DE-HGF)0$$aBoag, S.$$b4
000002019 7001_ $$0P:(DE-HGF)0$$aMasalovich, S.$$b5
000002019 7001_ $$0P:(DE-HGF)0$$aChen, W.C.$$b6
000002019 7001_ $$0P:(DE-HGF)0$$aGeorgii, R.$$b7
000002019 7001_ $$0P:(DE-HGF)0$$aWild, J.M.$$b8
000002019 7001_ $$0P:(DE-HGF)0$$aFrost, C.D.$$b9
000002019 773__ $$0PERI:(DE-600)1466532-3$$a10.1016/j.nima.2008.10.009$$gVol. 598, p. 774 - 778$$p774 - 778$$q598<774 - 778$$tNuclear instruments & methods in physics research / A$$v598$$x0168-9002$$y2009
000002019 8567_ $$uhttp://dx.doi.org/10.1016/j.nima.2008.10.009
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