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反保 元伸; 粟野 信哉*; Bolton, P.; 近藤 公伯; 三間 圀興*; 森 芳孝*; 中村 浩隆*; 中堤 基彰*; Stephens, R. B.*; 田中 和夫*; et al.
Physics of Plasmas, 17(7), p.073110_1 - 073110_5, 2010/07
被引用回数：12 パーセンタイル：42.46(Physics, Fluids & Plasmas)High density energetic electrons that are created by intense laser plasma interactions drive MeV proton acceleration. Correlations between accelerated MeV protons and electrons are experimentally investigated at laser intensities in the range, 10
- 10
W/cm
with 
-polarization. Observed proton maximum energies are linearly proportional to the electron slope temperatures with a scaling coefficient of about 10. Experimental results also indicate that, in the context of the simple analytical fluid model for transverse normal sheath acceleration, the ion (proton) density is comparable to density of the hot electron cloud near the target rear surface if an empirical acceleration time is assumed.
河内 哲哉; 岸本 牧; 加道 雅孝; 田中 桃子; 長谷川 登; 越智 義浩; 錦野 将元; 石野 雅彦; 今園 孝志; 國枝 雄一; et al.
no journal, ,
原子力機構では、波長13.9nmのニッケル様銀レーザーを用いて、物質科学,高密度プラズマ診断,X線によるアブレーション物理,シングルショットホログラフィー、そして原子分子物理等への応用研究の展開を図っている。また、0.1Hzで動作する高繰返しドライバーレーザーの導入により、多数のショットを必要とする応用研究への展開も可能となっており、その利用を目的としたX線干渉計用ビームラインを建設している。X線レーザーの短波長化に関しては、最近、レーザー加速により加速された電子と種光を衝突させることで短波長コヒーレント光が発生することの原理実証に成功した。また、インコヒーレントX線励起による水の窓領域のX線レーザーの発生方法についても理論シミュレーションによる研究を行っている。本招待講演ではこれらの最新の研究成果について報告する。
三間 圀興*; 東 博純*; 山崎 明義; 神谷 富裕; 奥田 匠昭*; 右京 良雄*; 加藤 義章*; Gonzales, R.*; Soldo, F.*; Perlado, J. M.*; et al.
no journal, ,
The micro-meter scale distribution of Li in a positive electrode of a Li-ion battery contains Li
Ni
Co
Al
MgO
(x = 1.05
0.5) micro particles was imaged by micro-PIGE (Particle-Induced Gamma Ray Emission) technique with the beam diameter of 11.5 
m at Takasaki Ion Accelerators for Advanced Radiation Application facility. In the experiments, measurements were made on the cross section of a positive electrode which was disassembled from the Li-ion battery after rapid charging. As a result, we found that the Li concentration distribution is non-uniform along the depth direction as is expected from the Li diffusion velocity and the charging speed of the sample. This results show that the IBMA is a powerful tool for the diagnostics of the Li-ion batteries and also for that of other battery structures under various charge and discharge conditions. Those data are expected to be useful for the R&D of the advanced batteries.
山崎 明義*; 神谷 富裕; 佐藤 隆博; 三間 圀興*; 藤田 和久*; 奥田 匠昭*; 佐和田 博*; 斎藤 俊哉*; Gonzales, R.*; Perlado, J. M.*; et al.
no journal, ,
For the development of advanced lithium (Li) ion batteries, precise diagnostics of Li in the electrode material is required. In order to obtain specific distribution of Li in Li ion battery materials, we have utilised the nuclear reaction analysis (NRA) and the particle induced 
-ray emission analysis (PIGE) with the micro-PIXE analysis, which characterises the heavier elements, in the proton microbeam system at TIARA. The Li distribution in real Li-ion batteries was analysed mainly in the cross-sections of fabricated electrode samples containing micro particles based on metal oxides. The objects of the analyses were extended to all-solid batteries as the candidate for the next generation Li ion battery. The obtained images show the distributions of the Li ions buried in the electrode materials varying with charging condition and other various factors. This paper describes the analysis system and results of the experiments.
斎藤 俊哉*; 山崎 明義*; 神谷 富裕; 藤田 和久*; 三間 圀興*; 加藤 義章*; 射場 英紀*
no journal, ,
All solid batteries (ASB) is one of the most promising candidates for post-Li-ion battery especially for large scale applications such as electric vehicle, plug-in hybrid vehicle and stationary use. On the other hand, one of the major drawbacks of ASB is the poor power density due to its large "interfacial resistance" of electrodes. The origin of interfacial resistance is cracks and/or resistive layer between active material and solid electrolyte. To figure out a quantitative view of the poor power density, the micro-PIXE/PIGE system was utilized to obtain 2D elemental images of transition metals and Li in samples of ASB with a spatial resolution of m level at the ion accelerator facility, TIARA. The result will be shown in the conference and the possibility of in-situ observation will be discussed.
