ABSTRACT
High quality x-ray laser development at APRC M. Kishimoto, M. Tanaka, M. Nishikino, T. Kawachi, M. Kado, K. Sukegawa, N. Hasegawa, Y. Ochi, R. Z. Tai, H. Tang, K. Nagashima, A. Nagashima, Y. Kato
X-ray Laser Research Group, Advanced Photon Research Center, Japan Atomic Energy Research Institute
Abstract. We have demonstrated the 13.9nm soft x-ray laser with full spatial coherence using oscillator-amplifier configuration with two gain media. We have obtained the highly directional x-ray laser beam with a beam divergence of 0.2mrad and confirmed the full spatial coherence by means of Young's double slit interferometry. The gain medium of the second plasma is generated in a low density area for avoiding the influence of refraction, where the electron density is about 1% of the critical density.
