Abstract
We propose a scheme for producing high gain recombination X-ray lasers on hydrogen-like Balmer α transitions by irradiating fibre targets with a 2 ps Chirped Pulse Amplification CPA beam of a Nd-glass laser facility. Very high gain coefficients for H-like C, N, O, F, Na Balmer α transitions are predicted. The optimum electron density and temperature for maximum gain operation scale approximately asN e ∼ 4 × 1013 Z 7 cm−3 and Te ∼ 7 × 10−3 Z 4 eV, respectively, at the time when maximum lasing gain appears. Significant improvement in gain performance of recombination X-ray lasers is predicted by using CPA ps pulse drivers.
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