Issue |
EPJ Web Conf.
Volume 272, 2022
QENS/WINS 2022 – 15th Edition of the QENS Series and 10th of the WINS Workshops
|
|
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Article Number | 02012 | |
Number of page(s) | 8 | |
Section | WINS | |
DOI | https://doi.org/10.1051/epjconf/202227202012 | |
Published online | 17 November 2022 |
https://doi.org/10.1051/epjconf/202227202012
Possible options for efficient wide-band polychromatic measurements using chopper spectrometers at pulsed sources
1
Materials & Life Science Division, J-PARC Center, JAEA, Tokai, Ibaraki, Japan
2
Materials Sciences Research Center, JAEA, Tokai, Ibaraki, Japan
3
Research & Development HQ., Sumitomo Rubber Industries, Ltd., Kobe, Hyogo, Japan
4
Institute of Materials Structure Science, KEK, Tsukuba, Ibaraki, Japan
* Corresponding author: kenji.nakajima@j-parc.jp
Published online: 17 November 2022
The polychromatic incident energy measurements using chopper spectrometers at pulsed sources enables us to measure dynamics with different energy resolutions, i.e., different time-windows with a single-measurement. By increasing the possible time-window for a single-measurement, the efficiency and usefulness of such measurements is enhanced. This is achieved by allowing the crossing of trajectories of different Eis from different source pulses on the time-of-flight diagram (the interveined trajectory). We will present an actual case of the interveined trajectory on AMATERAS, a cold-neutron chopper spectrometer installed at J-PARC, together with our experience. Some of our attempts to formulate the conditions for performing polychromatic Ei measurements employing interveined trajectories are discussed. These which can be applied to existing spectrometers, and considered as design criteria for future chopper spectrometers. Further related plan of AMATERAS to improve measuring efficiency is also mentioned.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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