Effect of Small Focus on Electron Heating and Proton Acceleration in Ultrarelativistic Laser-Solid Interactions

N. P. Dover, M. Nishiuchi, H. Sakaki, Ko Kondo, M. A. Alkhimova, A. Ya Faenov, M. Hata, N. Iwata, H. Kiriyama, J. K. Koga, T. Miyahara, T. A. Pikuz, A. S. Pirozhkov, A. Sagisaka, Y. Sentoku, Y. Watanabe, M. Kando, K. Kondo

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Acceleration of particles from the interaction of ultraintense laser pulses up to 5×1021 W cm-2 with thin foils is investigated experimentally. The electron beam parameters varied with decreasing spot size, not just laser intensity, resulting in reduced temperatures and divergence. In particular, the temperature saturated due to insufficient acceleration length in the tightly focused spot. These dependencies affected the sheath-accelerated protons, which showed poorer spot-size scaling than widely used scaling laws. It is therefore shown that maximizing laser intensity by using very small foci has reducing returns for some applications.

本文言語英語
論文番号084802
ジャーナルPhysical review letters
124
8
DOI
出版ステータス出版済み - 2 26 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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