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Proceedings Paper

Current status of advanced photon research program at JAERI
Author(s): Takashi Arisawa; Akira Nagashima; Eisuke J. Minehara; K. Koike; Kazuhisa Nakajima; M. Yamagiwa; Y. Kato
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Paper Abstract

Under the Advanced Photon Research program, an ultra short pulse/high peak power laser (HPPL), x-ray laser (XRL) and free electron laser (FEL) have been developed since 1997 at Japan Atomic Energy Research Institute. For high peak power laser development a new method relating to the wave front detection based on Fresnel equation fitting and second harmonics generation are applied to the developed 100TW Ti:sapphire laser with 18.9fs pulse width. Further development towards 500TW-peak power is also carried out. Wave front compensation system using a photo refractive crystal with a novel external feedback loop to correct distorted wave front was successfully applied to high repetition rate all solid state Ti:Sapphire laser system that showed excellent focusability. For the development of compact and practical x-ray lasers a transition gain type x- ray lasing is studied using a pair of double pulsed glass lasers of 10J with 1ps pulse width and efficient laser oscillation for Ne-like Ti, Ni-like Ag, and Ni-like Sn were confirmed in the preliminary study. Energy consumed for these laser oscillations was less than that obtained by the conventional methods. Superconducting linac based FEL recorded an average power over 2kW in far IR region after succeeding in the generation of high peak and short pulse bunched electron beam, and energy recovering technique for electron beam by making use of superconducting system is now constructed for further higher power which could also lead to the technologies related to the shorter wavelength region. The above new light sources are ready for applying the experiments such as laser induced particle acceleration, high field physics, photochemistry, and the related simulation studies using massive parallel scalar computer are also made.

Paper Details

Date Published: 23 April 2001
PDF: 8 pages
Proc. SPIE 4424, ECLIM 2000: 26th European Conference on Laser Interaction with Matter, (23 April 2001); doi: 10.1117/12.425567
Show Author Affiliations
Takashi Arisawa, Japan Atomic Energy Research Institute (Japan)
Akira Nagashima, Japan Atomic Energy Research Institute (Japan)
Eisuke J. Minehara, Japan Atomic Energy Research Institute (Japan)
K. Koike, Japan Atomic Energy Research Institute (Japan)
Kazuhisa Nakajima, Japan Atomic Energy Research Institute (Japan)
M. Yamagiwa, Japan Atomic Energy Research Institute (Japan)
Y. Kato, Japan Atomic Energy Research Institute (Japan)


Published in SPIE Proceedings Vol. 4424:
ECLIM 2000: 26th European Conference on Laser Interaction with Matter
Milan Kalal; Karel Rohlena; Milan Sinor, Editor(s)

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