Author/Authors :
Chupp، نويسنده , , T.E. and Coulter، نويسنده , , K.P. and Kandes، نويسنده , , M. and Sharma، نويسنده , , M. and Smith، نويسنده , , T.B. and Jones، نويسنده , , G. and Chen، نويسنده , , W.C. and Gentile، نويسنده , , T.R. and Rich، نويسنده , , D.R. and Lauss، نويسنده , , B. and Gericke، نويسنده , , M.T. and Gillis، نويسنده , , R.C. and Page، نويسنده , , S.A. and Bowman، نويسنده , , J.D. and Penttila، نويسنده , , S.I. and Wilburn، نويسنده , , W.S. and Dabaghyan، نويسنده , , M. and Hersman، نويسنده , , F.W. and Mason، نويسنده , , M.، نويسنده ,
Abstract :
A large area polarized 3He neutron spin filter has been developed and tested in long-term operation. The polarizer cells have area 50 cm2 and larger allowing access to a large area neutron beam. Polarization of 3He up to 57 ± 1 % was measured by monitoring the neutron transmission through the 3He. The polarization was maintained over the course of several weeks, but the maximum attainable polarization declined over the course of a year-long run as the cell degraded, possibly due to long-term exposure to the neutron beam at high temperatures. The resulting neutron polarization and transmission are velocity dependent and are optimized for 5 إ. Cell construction, polarizer design, performance, and polarimetry are described in this paper.
Keywords :
Polarized neutrons , Pulsed neutrons , Symmetry tests , Spin filters , Polarized 3He
