Optical guiding of intense laser pulses by fast Z-pinch discharge |
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| Authors: | Tomonao Hosokai Masaki Kando Hideki Dewa Hideyuki Kotaki Syuji Kondo Syuhei Kanazawa Noboru Hasegawa Kazuhiko Horioka Kazuhisa Nakajima |
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| Affiliation: | 1. Advanced Photon Research Center, Kansai Research Establishment, Japan Atomic Energy Research Institute, Japan;2. Department of Energy Sciences, Tokyo Institute of Technology, Japan;3. High Energy Accelerator Research Organization (KEK), Japan |
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| Abstract: | 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 × 1017 W/cm2) 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 |
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| Keywords: | laser wakefield acceleration intense ultrashort pulse laser optical guide channeling fast Z-pinch discharge |
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