Laser focusing equivalence behavior of mass-limited targets in laser particle acceleration

2025/04/27 by Toshimasa Morita, Morita, Toshimasa
Engineering · Physics and Astronomy · #FOS: Physical sciences #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #Plasma Physics (physics.plasm-ph) #Space Satellite Systems and Control

paper · pdf · doi:10.48550/arxiv.2504.19106

openalex publication_date 2025/04/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The generation of 200 MeV class protons by irradiating a 25 J laser pulse onto a water target using three-dimensional particle-in-cell simulation is shown. Two types of targets -- foil and disk -- are evaluated and compared. Disks, which are mass-limited targets, produce ions with higher energy than those produced by foils. This enhancement is attributed to laser focusing equivalent effects in mass-limited targets during the acceleration process. In addition, the disk diameter that generates the maximum energy protons is theoretically derived, which shows good agreement with the simulation result.

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