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Journal Articles

Splash plasma channels produced by picosecond laser pulses in argon gas for laser wakefield acceleration

Mizuta, Yoshio*; Hosokai, Tomonao*; Masuda, Shinichi*; Zhidkov, A.*; Makito, Keigo*; Nakanii, Nobuhiko*; Kajino, Shohei*; Nishida, Akinori*; Kando, Masaki; Mori, Michiaki; et al.

Physical Review Special Topics; Accelerators and Beams, 15(12), p.121301_1 - 121301_10, 2012/12

 Times Cited Count:20 Percentile:72.55(Physics, Nuclear)

Journal Articles

Generation of stable and low-divergence 10-MeV quasimonoenergetic electron bunch using argon gas jet

Mori, Michiaki; Kondo, Kiminori; Mizuta, Yoshio*; Kando, Masaki; Kotaki, Hideyuki; Nishiuchi, Mamiko; Kado, Masataka; Pirozhkov, A. S.; Ogura, Koichi; Sugiyama, Hironori*; et al.

Physical Review Special Topics; Accelerators and Beams, 12(8), p.082801_1 - 082801_5, 2009/08

 Times Cited Count:22 Percentile:78(Physics, Nuclear)

The pointing stability and divergence of a quasimonoenergetic electron bunch generated in a self-injected laser-plasma acceleration regime using 4 TW laser is studied. A pointing stability of 2.4 mrad root-mean-square (RMS) and a beam divergence of 10.6 mrad (RMS) were obtained using an argon gas-jet target for 50 sequential shots, while these values were degraded by a factor of three at the optimum condition using helium. The peak electron energies were 8.5$$pm$$0.7 MeV and 24.8$$pm$$3.6 MeV using argon and helium, respectively. The experimental results indicate that the different propagation condition could be generated with the different material, although it is performed with the same irradiation condition.

Oral presentation

Diagnosis of 30MeV quasi-monoenergetic electron beam production driven by intense laser

Mori, Michiaki; Pirozhkov, A. S.; Kando, Masaki; Mizuta, Yoshio*; Kondo, Kiminori*; Tanaka, Kazuo*; Homma, Takayuki; Daito, Izuru; Ogura, Koichi; Sagisaka, Akito; et al.

no journal, , 

no abstracts in English

Oral presentation

Pointing stabilization of electron beam driven by 4TW laser

Mori, Michiaki; Mizuta, Yoshio*; Kondo, Kiminori; Nishiuchi, Mamiko; Kado, Masataka; Kando, Masaki; Pirozhkov, A. S.; Kotaki, Hideyuki; Ogura, Koichi; Sugiyama, Hironori*; et al.

no journal, , 

The collimatability of quasi-monoenergetic electron beam production in the self-injected laser-plasma acceleration regime is studied. The collimation of electron beam drived by terawatt femtosecond laser (4.1 TW, 40 fs) is measured at two species of gas material (Helium gasjet and Argon gasjet). We measured 3.2 mrad pointing stability and beam divergence of 11 mrad (r.m.s.) at Argon gasjet for 50 sequencial shots. At such condition, the peak electron energy is 9.1$$pm$$1.0 MeV with 80% reproducebility. For Helium, the pointing stability is three times larger than that of Argon. It is considered that the laser channel formation is important role for stable electron beam generation.

Oral presentation

Pointing stability of quasi-monoenergetic electron bunch accelerated by laser wakefield

Mori, Michiaki; Mizuta, Yoshio*; Kondo, Kiminori; Nishiuchi, Mamiko; Kado, Masataka; Kando, Masaki; Pirozhkov, A. S.; Kotaki, Hideyuki; Ogura, Koichi; Sugiyama, Hironori*; et al.

no journal, , 

The stability and collimatability of quasi-monoenergetic electron beam production in the self-injected laser-plasma acceleration regime are studied. The collimation of electron beam drived by terawatt femtosecond laser (4.5 TW, 40 fs) is measured at two species of gas material (Helium gasjet and Argon gasjet). We measured 3.2 mrad pointing stability and beam divergence of 11 mrad (r.m.s.) at Argon gasjet for 50 continuous shots. At such condition, the peak electron energy is 9.1$$pm$$1.6 MeV. For Helium, the pointing stability is three times larger than that of Argon. It is considered that the laser channel formation is important role for stable electron beam generation.

Oral presentation

Improvement of fatigue strength and biocompatibility of Ti-6Al-4V for dental implant by low energy laser peening

Iino, Yuki*; Akita, Koichi*; Sano, Yuji*; Mizuta, Yoshio*; Tamaki, Satoshi*; Shobu, Takahisa

no journal, , 

Oral presentation

Modification of punching surface on electrical steel sheet by low energy laser peening

Sendai, Toshihisa*; Akita, Koichi*; Sano, Yuji*; Mizuta, Yoshio*; Tamaki, Satoshi*; Shobu, Takahisa

no journal, , 

no abstracts in English

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