2026-07-03 大阪大学,量子科学技術研究開発機構
図１．ターゲットノーマルシース加速
＜関連情報＞
反射ピコ秒レーザーパルスによるブーストされたクーロン爆発を介した準単色重水素加速 Quasi-monoenergetic deuteron acceleration via boosted coulomb explosion by reflected picosecond laser pulse
Tianyun Wei,Zechen Lan,Yasunobu Arikawa,Yanjun Gu,Takehito Hayakawa,Alessio Morace,Ryuya Yamada,Kohei Yamanoi,Koichi Honda,Masaki Kando,Nobuhiko Nakanii,Seyed Reza Mirfayzi,Sergei Vladimirovich Bulanov & Akifumi Yogo
Nature Communications Published:29 May 2026
DOI:https://doi.org/10.1038/s41467-026-73196-9
Abstract
Generation of quasi-monoenergetic ions by intense laser is one of long-standing goals in laser-plasma physics. However, existing laser-driven ion acceleration schemes often produce broad energy spectra and limited control over ion species. Here we propose the acceleration mechanism, boosted Coulomb explosion, initiated by a standing wave, which is formed in a pre-expanded plasma by the interference between a continuously incoming main laser pulse and the pulse reflected by a solid target, where the pre-expanded plasma is formed from a thin layer on the solid target by a relatively strong pre-pulse. This mechanism produces a persistent Coulomb field on the target front side with field strengths on the order of TV/m for picoseconds. We experimentally demonstrate generation of quasi-monoenergetic deuterons up to 50 MeV using an in-situ D2O-deposited target. Our results show that the peak energy can be tuned by the laser pulse duration.
