TY - JOUR
T1 - Facility for the (p, n) polarization transfer measurement
AU - Sakai, H.
AU - Okamura, H.
AU - Otsu, H.
AU - Wakasa, T.
AU - Ishida, S.
AU - Sakamoto, N.
AU - Uesaka, T.
AU - Satou, Y.
AU - Fujita, S.
AU - Hatanaka, K.
N1 - Funding Information:
The authors would like to thank A. Okihana, S. Kamigaito, and N. Koori for their help in various stages of construction and R/D. They are very grateful to M.B. Greenfield for useful discussion and help in preparing the manuscript. The development of the two-dimensional position-sensitive neutron detectors has been made at the University of Tokyo and it is supported financially in part by the Grant-in-Aid for Scientific Research No. 6342007 of Ministry of Education, Science and Culture of Japan. Experiments were performed at RCNP by using R/D beam time and also under Program Numbers El7, El8 and E30. Last but not least we would like to acknowledge the support by the RCNP in various stages without which this work could not have been accomplished.
PY - 1996/1/21
Y1 - 1996/1/21
N2 - We have designed and constructed a facility to measure the complete polarization transfer coefficient Dij for the (p, n) reaction at intermediate energies. The facility consists of a beam swinger dipole magnet used for angular distribution measurements and a 100 m tunnel for the neutron energy measurement by the time-of-flight method. Typical neutron energy resolution is about 1.85 MeV for 290 MeV neutrons including a contribution of 1 MeV due to the target thickness. The background associated with this tunnel system was carefully investigated and found to be negligibly small. A dipole magnet for the neutron spin rotation is installed in the neutron flight path to measure the longitudinal polarization as well as the induced polarization. The neutron polarimeter which consists of 6 planes of the two-dimensional position-sensitive neutron detectors with a size of 1 m × 1 m × 0.1 m has been constructed. Its effective left-right analyzing power 〈Aeffy〉 has been calibrated at 194, 290 and 384 MeV. The figure-of-merit value defined by 〈Aeffy〉2 × ∈DS at 290 MeV is 4.05 × 10-4, where ∈DS is the double scattering efficiency.
AB - We have designed and constructed a facility to measure the complete polarization transfer coefficient Dij for the (p, n) reaction at intermediate energies. The facility consists of a beam swinger dipole magnet used for angular distribution measurements and a 100 m tunnel for the neutron energy measurement by the time-of-flight method. Typical neutron energy resolution is about 1.85 MeV for 290 MeV neutrons including a contribution of 1 MeV due to the target thickness. The background associated with this tunnel system was carefully investigated and found to be negligibly small. A dipole magnet for the neutron spin rotation is installed in the neutron flight path to measure the longitudinal polarization as well as the induced polarization. The neutron polarimeter which consists of 6 planes of the two-dimensional position-sensitive neutron detectors with a size of 1 m × 1 m × 0.1 m has been constructed. Its effective left-right analyzing power 〈Aeffy〉 has been calibrated at 194, 290 and 384 MeV. The figure-of-merit value defined by 〈Aeffy〉2 × ∈DS at 290 MeV is 4.05 × 10-4, where ∈DS is the double scattering efficiency.
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U2 - 10.1016/0168-9002(95)00716-4
DO - 10.1016/0168-9002(95)00716-4
M3 - Article
AN - SCOPUS:0001659059
VL - 369
SP - 120
EP - 134
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 1
ER -