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Title :Penumbral imaging with multi-penumbral-apertures and its heuristic reconstruction for nuclear reaction region diagnostics
Authors :Ueda, Tatsuki
Fujioka, Shinsuke
Nozaki, Shinya
Chen, Yen-wei
Nishimura, Hiroaki
Issue Date :1-Aug-2010
Abstract :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.
URL :https://doi.org/10.1088/1742-6596/244/3/032061
Type Local :雑誌掲載論文
ISSN :0976-7673
Publisher :IOP Publishing
URI :http://hdl.handle.net/20.500.12000/45945
Citation :Journal of Physics : Conference Series Vol.244 no.3
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Engineering)

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