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Report No.

Development of silver tape target system for high repetition X-ray laser

Nishikino, Masaharu; Ochi, Yoshihiro; Hasegawa, Noboru; Kawachi, Tetsuya; Oba, Toshiyuki; Kaihori, Takeshi; Nagashima, Keisuke

The improvement of X-ray laser generation so as to have a high repetition rate will open up the possibility of new applications. In the last decade, progress in reducing the required pump energy for the X-ray lasing and raising the repetition rate has been achieved by new technologies, such as the Transient Collisional Excitation (TCE) scheme and Grazing Incidence Pumping (GRIP). Under this circumstance, the development of continuous pumping to the target system is an important issue for realizing an XRL with the high repetition rate. We have developed a 13.9 nm XRL using a silver tape target4 and demonstrated a highly coherent XRL with an oscillator-amplifier configuration5 using two tape target systems and the TOPAZ laser system6 with a 10-J and a 0.1-Hz repetition rate. The output energy is comparable to the X-ray laser generated with a silver-deposited slab target, and the pointing stability using the new tape target system is better than conventional slab target.



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