Beethe, D. C., authorRocca, Jorge J., authorMarconi, M. C., authorOptical Society of America, publisher2007-01-032007-01-031988Rocca, J. J., D. C. Beethe, and M. C. Marconi, Proposal for Soft-X-Ray and XUV Lasers in Capillary Discharges, Optics Letters 13, no. 7 (July 1988): 565-567.http://hdl.handle.net/10217/67633Capillary 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.born digitalarticleseng©1988 Optical Society of America.Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Text