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<p>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 D<sub>2</sub>O-deposited target. Our results show that the peak energy can be tuned by the laser pulse duration.</p>

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Quasi-monoenergetic deuteron acceleration via boosted coulomb explosion by reflected picosecond laser pulse

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月29日

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  • 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

摘要

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.