WEKO3
アイテム
非相対論から相対論的強度のレーザーによるナノメートル厚ターゲットlarge-area suspended grapheneを用いたイオン加速
https://repo.qst.go.jp/records/83911
https://repo.qst.go.jp/records/839118c0e7c7a-1c6f-4b90-9eeb-de2bd8388f4e
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-11-24 | |||||
| タイトル | ||||||
| タイトル | 非相対論から相対論的強度のレーザーによるナノメートル厚ターゲットlarge-area suspended grapheneを用いたイオン加速 | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
南, 卓海
× 南, 卓海× 廖, 育資× 境, 健太郎× 西本, 貴博× 安部, 勇輝× 桐山, 博光× 近藤, 康太郎× 有川, 安信× 余語, 覚文× 坂和, 洋一× Morace, Alessio× 江頭, 俊輔× 太田, 雅人× 浅井, 孝文× 神野, 智史× 金崎, 真聡× 福田, 祐仁× 羽原, 英明× 溫, 偉源× 蔵満, 康浩× Hiromitsu, Kiriyama× Kotaro, Kondo× Takafumi, Asai× Yuji, Fukuda |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Laser ion acceleration has been intensively inves- tigated after the development of chirped pulse am- plification (CPA) technique. The accelerated ions are applicable for cancer therapy, radioisotope pro- duction, and fast ignition for inertial confinement fusion. To achieve higher ion energies, target thick- ness should be reduced. However, thinner targets can be easily broken by the pedestal or prepulse be- fore the main pulse arrival. We have developed a large-area suspend graphene (LSG) target, which is a single to multiple layered freestanding graphene sheet[3]. Graphene is the thinnest and the strongest material, hence LSG has the potential to be the best targets of laser ion acceleration. We have conducted several experiments with LFEX laser in Osaka University and J-KAREN-P laser in Kansai Photon Science Institute, National Institutes of Quantum Science and Technology. The LFEX laser irradiates on LSG targets with target normal angle. The maximum intensity is ∼ 4 × 10^18 W/cm^2. The J-KAREN-P laser is focused on LSG targets with 45 degree of incident angle at the intensity of ∼ 5 × 10^21 W/cm^2. We have tested the irradiation of non-relativistic laser inten- sity, < 10^18 W/cm^2, by putting the targets at defocusing positions of J-KAREN-P. Thomson parabola spectrometer and CR-39 stack are used to diagnose the accelerated ions. In the all experiments, no plasma mirrors are used. We have observed energetic ions with relativistic laser intensities, a0 ∼ 48 of J-KAREN-P best focus shots and a0 ∼ 1.8 of LFEX. Furthermore, MeV energy ions are also observed with non-relativistic laser intensity, a0 < 1, in defocused experiments of J-KAREN-P. These results imply that LSG has special features no other materials have. We discuss these specialities using particle-in-cell simulations. |
|||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 第38回 プラズマ・核融合学会 年会 | |||||
| 発表年月日 | ||||||
| 日付 | 2021-11-23 | |||||
| 日付タイプ | Issued | |||||
