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Proceedings Paper

Electron-beam-pumped high-repetition-rate KrF laser system
Author(s): Eiichi Takahashi; Isao Okuda; Yuji Matsumoto; Isao Matsushima; Susumu Kato; Kenji Kuwahara; Yoshiro Owadano
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Paper Abstract

A repetition-rate electron beam pumped KrF laser amplifier is being built at the Electrotechnical Laboratory to develop the technologies required for an inertial confinement fusion energy driver. The pulsed power system of the prototype amplifier has already been competed and generates pulses of -300kV, 80ns with a repetition-rate of 1Hz. The high voltage electric short pulses are obtained by step-up pulse transformers, magnetic switches and a water dielectric pulse forming line instead of a conventional Marx generator with gap switches. One of the key technologies with this system is the cooling method of pressure and anode foils in a HIBACHI structure to increase those lifetimes. Our design adopts radiation and conduction as the main cooling processes and allows the foils to reach a high temperature. HAVAR and molybdenum are chosen as pressure and anode foil respectively instead of conventional titanium foils. The maximum temperature of the foils were numerically estimated to show the feasibility of the design.

Paper Details

Date Published: 11 January 2000
PDF: 8 pages
Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); doi: 10.1117/12.375130
Show Author Affiliations
Eiichi Takahashi, Electrotechnical Lab. (Japan)
Isao Okuda, Electrotechnical Lab. (Japan)
Yuji Matsumoto, Electrotechnical Lab. (Japan)
Isao Matsushima, Electrotechnical Lab. (Japan)
Susumu Kato, Electrotechnical Lab. (Japan)
Kenji Kuwahara, Science Univ. of Tokyo (Japan)
Yoshiro Owadano, Electrotechnical Lab. (Japan)

Published in SPIE Proceedings Vol. 3886:
High-Power Lasers in Energy Engineering
Kunioki Mima; Gerald L. Kulcinski; William J. Hogan, Editor(s)

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