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Proposal for soft-x-ray and XUV lasers in capillary discharges

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Abstract

Capillary plasmas with large length-to-diameter ratios (1/d > 100) are proposed as amplification media for soft-x-ray and XUV radiation by direct discharge excitation. The capillary geometry provides a small volume and an adequate resistance for ohmic heating. Heat conduction to the capillary walls provides rapid cooling of the plasma during the decay of the excitation pulse, resulting in a large recombination rate and a population inversion. A time-dependent collisional–radiative model of the capillary plasma predicts gains of the order of 5 cm−1 in the 18.2-nm line of C vi.

© 1988 Optical Society of America

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