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Performance of the neutron polarimeter NPOL3 for high resolution measurements | T. Wakasa
; Y. Hagihara
; M. Sasano
; S. Asaji
; K. Fujita
; K. Hatanaka
; T. Ishida
; T. Kawabata
; H. Kuboki
; Y. Maeda
; T. Noro
; T. Saito
; H. Sakai
; Y. Sakemi
; K. Sekiguchi
; Y. Shimizu
; A. Tamii
; Y. Tameshige
; K. Yako
; | Date: |
3 Feb 2005 | Journal: | Nucl.Instrum.Meth. A547 (2005) 569-582 | Subject: | nucl-ex | Abstract: | We describe the neutron polarimeter NPOL3 for the measurement of polarization transfer observables $D_{ij}$ with a typical high resolution of $sim$300 keV at $T_n$ $simeq$ 200 MeV. 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 100 cm $ imes$ 10 cm $ imes$ 5 cm, and they cover the area of 100 $ imes$ 100 $mathrm{cm}^2$. 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 100 cm $ imes$ 100 cm $ imes$ 10 cm. The effective analyzing powers $A_{y;mathrm{eff}}$ and double scattering efficiencies $epsilon_{mathrm{D.S.}}$ were measured by using the three kinds of polarized neutrons from the ${}^{2}{
m H}(vec{p},vec{n})pp$, ${}^{6}{
m Li}(vec{p},vec{n}){}^{6}{
m Be}(mathrm{g.s.})$, and ${}^{12}{
m C}(vec{p},vec{n}){}^{12}{
m N}(mathrm{g.s.})$ reactions at $T_p$ = 198 MeV. The performance of NPOL3 defined as $epsilon_{mathrm{D.S.}}(A_{y;mathrm{eff}})^2$ are similar to that of the Indiana Neutron POLarimeter (INPOL) by taking into account for the counter configuration difference between these two neutron polarimeters. | Source: | arXiv, nucl-ex/0502006 | Services: | Forum | Review | PDF | Favorites |
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