Performance of the neutron polarimeter NPOL3 for high resolution measurements

Authors :: Wakasa, T.
Hagihara, Y.
Sasano, M.
Asaji, S.
Fujita, K.
Hatanaka, K.
Ishida, T.
Kawabata, T.
Kuboki, H.
Maeda, Y.
Noro, T.
Saito, T.
Sakai, H.
Sakemi, Y.
Sekiguchi, K.
Shimizu, Y.
Tamii, A.
Tameshige, Y.
Yako, K.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Aug2005, Vol. 547 Issue 2/3, p569-582. 14p.
Publication Year :: 2005
Abstract: Abstract: We describe the neutron polarimeter NPOL3 for the measurement of polarization transfer observables with a typical high resolution of 300keV at . The NPOL3 system consists of three planes of neutron detectors. The first two planes for neutron polarization analysis are made of 20 sets of one-dimensional position-sensitive plastic scintillation counters with a size of 100cm 10cm 5cm, and they cover the area of . The last plane for detecting doubly scattered neutrons or recoiled protons is made of the two-dimensional position-sensitive liquid scintillation counter with a size of . The effective analyzing powers and double scattering efficiencies were measured by using the three kinds of polarized neutrons from the , , and reactions at . The performance of NPOL3 defined as are similar to that of the Indiana Neutron POLarimeter by taking into account for the counter configuration difference between these two neutron polarimeters. [Copyright &y& Elsevier]