Repetition rate multiplication: RRM, an advanced measuring method planed for the backscattering instrument, DNA at the MLF, J-PARC

Nobuaki Takahashi, Kaoru Shibata, Yukinobu Kawakita, Kenji Nakajima, Yasuhiro Inamura, Takeshi Nakatani, Hiroshi Nakagawa, Satoru Fujiwara, Taku J. Sato, Itaru Tsukushi, Ferenc Mezei, Dan A. Neumann, Hannu Mutka, Masatoshi Arai

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A Si-analyzer neutron backscattering spectrometer, DNA, in MLF is the first indirect geometry instrument which chooses the coupled moderator as a pulsed neutron source in addition with a high speed disc chopper as a pulse-shaping device, aiming for high energy resolution with high intensity. The pulse-shaping has the advantage of obtaining a variety of slit opening times. On the other hand, it has the disadvantage of limiting the wavelength band width measured within one pulse-shaped neutron beam. This disadvantage is solved by employing 4 slit discs on the pulse-shaping chopper and generating multiple pulse-shaped incident beams to realize efficient measuring, the so called Repetition Rate Multiplication: RRM technique. The automatic phasing procedure for the RRM technique is firstly discussed.

Original languageEnglish
Article numberSB007
Journaljournal of the physical society of japan
Volume80
Issue numberSUPPL. B
DOIs
Publication statusPublished - 2011 Dec
Externally publishedYes

Keywords

  • Backscattering
  • Neutron scattering instrument
  • Pulse-shaping
  • Repetition rate multiplication

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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