Resolution matching between energy and momentum in position-sensitive detector on chopper spectrometer

K. Tomiyasu, S. Itoh

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We derived analytical expressions of energy (E) and momentum (Q) resolutions on a chopper spectrometer, including timing and geometrical parameters, such as a pulse width at a moderator, an opening time of a chopper, spectrometer lengths, sizes of a moderator, of a sample and of a position-sensitive detector (PSD) and pixel sizes in a PSD. For a long linear PSD, resolutions change for pixels dependently on their positions inside the PSD, because of the change in the flight path lengths. Controlling the pixel sizes can reduce such nonuniformity in resolutions. However, in order to diminish the nonuniformity in both of the E and Q resolutions simultaneously, the PSD length was found to be limited.

Original languageEnglish
Pages (from-to)1110-1113
Number of pages4
JournalPhysica B: Condensed Matter
Volume385-386
DOIs
Publication statusPublished - 2006 Nov 15

Keywords

  • Chopper spectrometer
  • HRC
  • J-PARC
  • PSD
  • Pulsed neutron

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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