2024-03-29T11:58:38Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02012394
2023-08-03T05:27:10Z
1642838163960:1642838338003
1642838403551:1642838406845
Penumbral imaging with multi-penumbral-apertures and its heuristic reconstruction for nuclear reaction region diagnostics
Ueda, Tatsuki
Fujioka, Shinsuke
Nozaki, Shinya
Chen, Yen-wei
Nishimura, Hiroaki
open access
Creative Commons Attribution 3.0
https://creativecommons.org/licenses/by/3.0/
Imaging of nuclear reaction region is important to clarify heating mechanism in a fast-ignition plasma. The nuclear reaction region can be identified by hard x-ray and neutron images, which are emanated from the heated region. We proposed a novel penumbral imaging that is suitable for imaging quanta having strong penetrating power, such as hard x ray and neutron. Using multiple penumbral apertures arranged with M-sequence leads to two orders of magnitude higher detection efficiency than that with a single aperture. In addition, a heuristic method was introduced to a image reconstruction procedure for reducing artifacts caused by noise in a penumbral image. A proof-of-principle experiment indicates that the proposed imaging is superior to the conventional one.
論文
IOP Publishing
2010-08-01
eng
journal article
VoR
http://hdl.handle.net/20.500.12000/45945
http://hdl.handle.net/20.500.12000/45945
https://u-ryukyu.repo.nii.ac.jp/records/2012394
https://doi.org/10.1088/1742-6596/244/3/032061
https://doi.org/10.1088/1742-6596/244/3/032061
0976-7673
0976-7681
Journal of Physics : Conference Series
244
3
https://u-ryukyu.repo.nii.ac.jp/record/2012394/files/Tatsuki_Ueda_2010_J._Phys.__Conf._Ser._244_032061.pdf