Accession Number : ADP007063

Title :   Evidence of X-Ray Laser Gain Cancellation Due to Plasma Inhomogeneity,

Corporate Author : PARIS-11 UNIV ORSAY (FRANCE)

Personal Author(s) : Jaegle, P. ; Dhez, P. ; Klisnick, A. ; Carillon, A. ; Jamelot, G.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Influence of Random Phase Plates on homogeneity of long plasma columns is studied by X-ray imaging. Consequence on laser gain at 105.7 A is discussed. Compared to the collisional pumping scheme, the recombination scheme in lithium-like ions is an attractive way to carry out a small-scale X-ray laser because it is known to be potentially the cheapest way of soft X-ray pumping. With the gain values actually reported, a long plasma column, of about 5 cm, would make soft X-ray lasers using lithium-like ions already available in laboratories. However some difficulties are associated with large gain production in long plasma columns (L > or = 2 cm). The observation of a rather low gain coefficient (0.5/cm) seems to be the general fact for plasmas of such length.

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

Subject Categories : Optics
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE