Multiple incident energy measurement on chopper spectrometers at J-PARC

Nakamura, Mitsutaka ; Nakajima, Kenji ; Kajimoto, Ryoichi ; Yokoo, Tetsuya*; Krist, T.*; Arai, Masatoshi

Inelastic neutron scattering measurement utilizing the multiple incident energies (multi- $E_{i}$ measurement) is a promising method to improve the measurement efficiency of chopper spectrometers at pulsed neutron sources. Multi- $E_{i}$ measurement can eliminate the detection dead time in time-of-flight measurement. We have been considering the instrumental design and novel device to realize the multi- $E_{i}$ measurement in several types of chopper spectrometer. In this presentation, the result of a series of considerations will be given. Particularly, we will introduce the disk-chopper arrangements for multi disk-chopper type spectrometer, and also the supermirror coated slit package system for Fermi chopper type spectrometer.

Language	:	English
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Meeting title	:	18th Meeting of the International Collaboration on Advanced Neutron Sources (ICANS-18)
Held date	:	2007/04
Location (city)	:	Dongguan
Location (country)	:	China
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Registration No. : BB20070284
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