Ultrahigh-gain Ni-like Kr soft x-ray laser by optical field ionization-initiated transient collisional excitation scheme

Oki Maya; Yutaka Nagata; Minoru Obara; Yoshinobu Aoyagi; Katsumi Midorikawa

doi:10.1117/12.366662

21 October 1999 Ultrahigh-gain Ni-like Kr soft x-ray laser by optical field ionization-initiated transient collisional excitation scheme

Oki Maya, Yutaka Nagata, Minoru Obara, Yoshinobu Aoyagi, Katsumi Midorikawa

Author Affiliations +

Proceedings Volume 3776, Soft X-Ray Lasers and Applications III; (1999) https://doi.org/10.1117/12.366662
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

We propose a Ni-like Kr soft x-ray laser operating on the 4d¹S₀ - 4p¹P₁ transition at 32.8 nm by a novel excitation scheme in which optical field ionization prepares Ni-like Kr ion with almost 100% abundance and inverse bremsstrahlung heats the plasma efficiently. The numerical calculation based on the hot-spot model predicts that ultra-high gains greater than 1000 cm^-1 in the low density plasma (N_e equals 5.6 X 10¹⁹ cm^-3) for a driving laser intensity of 1.75 X 10¹⁶ W/cm². With a longitudinally pumping, output energy greater than 1 (mu) J and an energy efficiency of approximately 10^-5 are expected with 200-torr Kr gas.

Citation Download Citation

Oki Maya, Yutaka Nagata, Minoru Obara, Yoshinobu Aoyagi, and Katsumi Midorikawa "Ultrahigh-gain Ni-like Kr soft x-ray laser by optical field ionization-initiated transient collisional excitation scheme", Proc. SPIE 3776, Soft X-Ray Lasers and Applications III, (21 October 1999); https://doi.org/10.1117/12.366662

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