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Optical guiding of intense laser pulses by fast Z‐pinch discharge
Author(s) -
Hosokai Tomonao,
Kando Masaki,
Dewa Hideki,
Kotaki Hideyuki,
Kondo Syuji,
Kanazawa Syuhei,
Hasegawa Noboru,
Horioka Kazuhiko,
Nakajima Kazuhisa
Publication year - 2001
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.1061
Subject(s) - laser , jitter , optics , materials science , rayleigh length , plasma channel , pinch , z pinch , atomic physics , plasma , pulse (music) , sapphire , helium , reproducibility , physics , electrical engineering , chemistry , laser beams , radiation , chromatography , detector , nuclear physics , engineering , quantum mechanics
We have proposed the optical guiding of intense laser pulses by fast Z‐pinch for channel‐guided laser wakefield acceleration (LWFA). The method has been developed based on capillary discharge‐pumped X‐ray laser technique. A discharge through preionized helium gas driven by a current of 4.8 kA with a rise time of 15 ns proved able to produce a uniform guiding channel with good reproducibility, less than the time jitter of 1.8 ns. The observed guiding channel formation process was corroborated by 1D‐MHD simulation. With this new guiding method, an intense Ti‐sapphire laser pulse (λ = 790 nm, 2.2 TW, 90 fs, 1 × 10 17 W/cm 2 ) was transported through the channel over a distance of 2 cm, corresponding to 12.5 times the Rayleigh length. © 2001 Scripta Technica, Electr Eng Jpn, 136(3): 19–27, 2001