| Issue |
EPJ Web Conf.
Volume 272, 2022
QENS/WINS 2022 – 15th Edition of the QENS Series and 10th of the WINS Workshops
|
|
|---|---|---|
| Article Number | 02002 | |
| Number of page(s) | 7 | |
| Section | WINS | |
| DOI | https://doi.org/10.1051/epjconf/202227202002 | |
| Published online | 17 November 2022 | |
https://doi.org/10.1051/epjconf/202227202002
Recent Progress on DNA ToF Backscattering Spectrometer in MLF, J-PARC
1
J-PARC Center, Japan Atomic Energy Agency (JAEA), 319-1195 Ibaraki, Japan
2
Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS), 319-1106 AQBRC, Ibaraki, Japan
3
Materials Science Research Center, Japan Atomic Energy Agency (JAEA), 319-1195 Ibaraki, Japan
* Corresponding author: kawakita.yukinobu@jaea.go.jp
Published online: 17 November 2022
DNA is a time-of-flight backscattering neutron spectrometer installed at the Materials and Life Science Experimental Facility in J-PARC. After opening user program, we have been developing and upgrading DNA. The energy resolution is improved and achieved the designed value of 1.4 μeV by renewing the disks of the pulse shaping chopper that can rotate at max 300 Hz instead of 225 Hz of the previous disks. The installation of Si311 analyser mirrors has been almost accomplished, which extends momentum transfer region up to 3.7 Å-1. We demonstrate the effect of this extension by measuring and analysing methyl rotation dynamics in solid toluene at 10 K and 40 K. We also report variety of sample environment available at DNA and their remote handling.
© The Authors, published by EDP Sciences, 2022
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