Discussion of gas density dependence in the cluster size evaluation using Mie scattering

Jinno, Satoshi   ; Fukuda, Yuji; Sakaki, Hironao; Yogo, Akifumi; Kanasaki, Masato; Kondo, Kiminori; Faenov, A. Ya.*; Skobelev, I. Yu.*; Pikuz, T.; Boldarev, A. S.*; Gasilov, V. A.*

We have achieved high-energy ion generation in the laser driven ion acceleration using cluster-gas targets, which has been prepared by using the nozzle specially designed based on the Boldarev's model. However, a characterization of the cluster-gas targets is not sufficient to further investigate the ion acceleration mechanism and optimize the acceleration condition. In present work, the target diagnosis apparatus applying Mie scattering and interferometry has been developed. The sub-micron sized CO clusters were verified by measuring the angular distribution of the scattering light from the mixed gas target of CO (30%) and H (70%). Moreover, the gas density profile was obtained by the interferometry. We will discuss the relation between gas density and a cluster size in the presentation.