Accession Number : ADP007059

Title :   Progress Toward the Development of a Compact Capillary Discharge Soft-X-Ray Laser,

Corporate Author : COLORADO STATE UNIV FORT COLLINS DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Rocca, J. J. ; Marconi, M. C. ; Szapiro, B. T. ; Meyer, J.

Report Date : 22 MAY 1992

Pagination or Media Count : 5

Abstract : The possibility of developing a soft X-ray recombination laser in a capillary discharge plasma is being investigated. Soft X-ray emission spectra of highly ionized carbon plasmas generated by two excitation regimes in 1 mm diameter polyethylene capillaries are discussed. A 50 kA, 108 ns FWHM discharge produced a dense ((1*10 to the 19th)/cu. cm.) plasma in which intense Cvi emission is only observed shortly after the peak of the current pulse. In contrast, the first time resolved spectra from a fast 25 ns FWHM, 90 kA discharge pulse, showed strong C sub VI 18.2 nm emission also at the end of the first half cycle of the current pulse. This new fast discharge, which is capable of generating 150 kA current pulses through 2 cm long capillaries was designed to produce larger C sub VII density and shorter excitation fall time, to explore the possible occurrence of soft X-ray amplification.

Descriptors :   *X RAY LASERS, *SOFT X RAYS, *COHERENT OPTICAL RADIATION, LASER PUMPING, X RAY SPECTRA, PLASMAS(PHYSICS), SHORT WAVELENGTHS, POLYETHYLENE, LASER APPLICATIONS, COHERENT RADIATION, SYMPOSIA.

Subject Categories : Optics
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE