Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session C07: Instrumentation: DAQ and Beam Diagnostics
7:00 PM–10:00 PM,
Tuesday, November 28, 2023
Hilton Waikoloa Village
Room: Queens 6
Chair: Maria Anastasiou, Lawrence Livermore Natl Lab
Abstract: C07.00010 : Development of a method for detecting γ-rays from high-energy laser plasma and test experiments*
9:15 PM–9:30 PM
Presenter:
Ryota Iwasaki
(RCNP, Osaka University)
Authors:
Ryota Iwasaki
(RCNP, Osaka University)
Atsushi Tamii
(Research Center for Nuclear Physics)
Nobu Kobayashi
(RCNP, Osaka University)
Shinsuke Ota
(RCNP, Osaka University)
Azusa Inoue
(RCNP, Osaka University)
Rei Niina
(RCNP, Osaka University)
Hiroki Rokujo
(Institute of Materials and Systems for Sustainability, Nagoya University)
Kazuma Nakazawa
(Gifu University)
Mamiko Nishiuchi
(Kansai Institute for Photon Science, National Institutes for Quantum Science and Technology)
Hironao Sakaki
(Kansai Institute for Photon Science, National Institutes for Quantum Science and Technology)
Kotaro Kondo
(Kansai Institute for Photon Science, National Institutes for Quantum Science and Technology)
Akira Kon
(Kansai Institute for Photon Science, National Institutes for Quantum Science and Technology)
Chang Liu
(Kansai Institute for Photon Science, National Institutes for Quantum Science and Technology)
Takahiro Kawabata
(Depertment of Physics, Osaka University)
Tatsuya Furuno
(Depertment of Physics, Osaka University)
Seiya Tsuji
(Depertment of Physics, Osaka University)
Yuya Honda
(Depertment of Physics, Osaka University)
Megumi Niikura
(High Energy Nuclear Physics Lab, RIKEN)
Ibuki Takemoto
(Interdisciplinary Graduate School of Engineering Sciences, Kyushu University)
Oliver Wieland
(INFN, Sezione di Milano)
Tatsuhiko Miyatake
(Interdisciplinary Graduate School of Engineering Sciences, Kyushu University)
Under these circumstances, nuclear reactions are considered to be taking place in the interaction between the intense laser pulse and the target material. In this study, we aimed to measure γ-rays generated by irradiating 5-μm thick Ag target with a high-intensity short-pulse laser called J-KAREN at the Kansai Institute for Photon Science. Laser plasmas emit a large number of high energy photons, which are difficult to measure with scintillators due to pile-up effect. The purpose of this study is to develop a new diagnostic technique that will serve as a basis for laser plasma physics.
Here, a detector called an emulsion (nuclear emulsion) is used to detect the electron-positron pairs produced via the pair production by γ-ray while visualizing them. Because emulsions have high spatial resolution of submicron, the angle, energy, and flux of the incident γ-rays can be reconstructed with high precision, it makes easy to determine whether the photons are from the direction of target or not.
The development status of γ-rays measurement technique using emulsions and the detail of the detection method with emulsions will be reported.
*This work is supported by JSPS KAKENHI Grant Number JP22K18715.
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