Performance evaluation test of radial collimators for chopper spectrometer at J-PARC

Nakamura, Mitsutaka   ; Kawakita, Yukinobu  ; Kambara, Wataru; Aoyama, Kazuhiro; Yamauchi, Yasuhiro; Kajimoto, Ryoichi  ; Ikeuchi, Kazuhiko*; Iida, Kazuki*; Inamura, Yasuhiro  ; Nakajima, Kenji  ; Kikuchi, Tatsuya  ; Kawamura, Seiko   

In recent years, the need for neutron inelastic scattering experiments in special environments under the strong magnetic field and the high temperature is increasing. On the other hand, there is a problem that the unnecessary scattering originating from the sample environment devices affects the detection of weak inelastic signals. To solve this problem, we have been developing the radial collimator for chopper spectrometer at J-PARC. In this talk, we plan to introduce the performance evaluation results of our radial collimator.