RF synchronized short pulse laser ion source

Yasuhiro Fuwa; Yoshihisa Iwashita; Hiromu Tongu; Shunsuke Inoue; Masaki Hashida; Shuji Sakabe; Masahiro Okamura; Atsushi Yamazaki

doi:10.1063/1.4935841

RF synchronized short pulse laser ion source

Rev Sci Instrum. 2016 Feb;87(2):02A911. doi: 10.1063/1.4935841.

Authors

Yasuhiro Fuwa¹, Yoshihisa Iwashita¹, Hiromu Tongu¹, Shunsuke Inoue¹, Masaki Hashida¹, Shuji Sakabe¹, Masahiro Okamura², Atsushi Yamazaki³

Affiliations

¹ Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
² Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
³ Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan.

PMID: 26931972
DOI: 10.1063/1.4935841

Abstract

A laser ion source that produces shortly bunched ion beam is proposed. In this ion source, ions are extracted immediately after the generation of laser plasma by an ultra-short pulse laser before its diffusion. The ions can be injected into radio frequency (RF) accelerating bucket of a subsequent accelerator. As a proof-of-principle experiment of the ion source, a RF resonator is prepared and H2 gas was ionized by a short pulse laser in the RF electric field in the resonator. As a result, bunched ions with 1.2 mA peak current and 5 ns pulse length were observed at the exit of RF resonator by a probe.