Accession Number:

ADP007058

Title:

Radiation Cooling in Photopumped C VI Inversion,

Personal Author(s):

Corporate Author:

LEHIGH UNIV BETHLEHEM PA DEPT OF PHYSICS

Report Date:

1992-05-22

Abstract:

Radiation cooling as a means to reach inversion in photoionized C VI is analyzed in the context of energy transfer between excited ions and free electrons. The application of this scheme for the specific case of a hydrogen-like C VI plasma, exposed to the soft x-ray emissions of a titanium-laser-produced plasma was considered. Necessary conditions for the achievement of inversion are a low plasma temperature approx. 10 eV, and a high electron density approx. 10 to the 19thcu. cm. Both are required for the establishment of a strong collisional-recombination regime, favouring the cascading of electrons towards the upper excited levels, leaving the lower levels almost unpopulated. Radiative cooling was originally proposed as a means to reach the desired temperature in similar recombination schemes, however posterior work has shown that his regime was not attainable for low-Z materials. In this paper we consider in detail the hypothesis of radiative cooling for the case of C VI pumped by the Ti-plasma.

Supplementary Note:

This article is from 'Osa Proceedings of the Topical Meeting (5th) on Short-Wave Length Coherent Radiation: Generation and Applications Held in Monterey, California on 8-10 April 1991. Volume 11,' AD-A252 973, p101-105.

Pages:

0005

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0.00MB

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