[15a-B7-1~14] 8.1 Plasma production and control

[15a-B7-7] Development of an Electrostatic Accelerator for Laser-Ablation Plasma

〇Yuuki Nakamura¹, Haruhito Kato¹, Hideyuki Horisawa¹ (1.Tokai Univ.)

Keywords:Laser ablation plasma, Electric propulsion

A fundamental study of a laser-electrostatic hybrid propulsion system with alternating electric field applied to an acceleration electrode was conducted, in which laser-induced plasmas were induced through laser beam irradiation onto a solid target and accelerated by electrical means instead of direct acceleration using only laser beam. In the laser-induced plasma generated from a solid target irradiated with a nanosecond laser pulses exceeding an ablation fluence, it was shown that electrons, primarily absorbing the laser energy, were emitted earlier and faster from the target and then ions follow. In this study, to accelerate the temporally shifted particles, an alternating electric field accelerator, rather than a static field accelerator, was developed, which can firstly accelerate electrons with a negative electric field pulse and then secondly accelerate ions with another positive electric field pulse.The acceleration characteristics of electrons and ions using alternating fields were evaluated by a Faraday cup.