RECOMBINATION X-RAY LOSERS DRIVEN BY SHORT PULSES

Citation
Pb. Holden et al., RECOMBINATION X-RAY LOSERS DRIVEN BY SHORT PULSES, Journal of physics. B, Atomic molecular and optical physics, 28(13), 1995, pp. 2745-2756
Citations number
23
Categorie Soggetti
Physics, Atomic, Molecular & Chemical",Optics
ISSN journal
09534075
Volume
28
Issue
13
Year of publication
1995
Pages
2745 - 2756
Database
ISI
SICI code
0953-4075(1995)28:13<2745:RXLDBS>2.0.ZU;2-4
Abstract
A recent experiment demonstrating a gain length approximate to 6 in a C VI laser at 182 Angstrom has revived interest in recombination as an approach to soft x-ray lasing. A single 30 J beam of a 2ps CPA Nd-gla ss laser was used to generate gains of 12.5 cm(-1) in a 5 mm carbon fi bre. We extend earlier work on scaling laws to investigate the paramet er space of the experiment, perform detailed simulations with a 1D Lag rangian code and consider some aspects of the refraction properties of the system. We investigate the extension of the scheme to longer leng ths and to the shorter wavelength O vm laser. Both of these extensions appear to create some difficulties which predominantly arise from the limitations on the target length imposed by the short timescales of t he gain. It appears, however, that in the case of carbon saturation sh ould be attainable without the use of travelling wave pumping. We inve stigate the role of impurities in oxygen targets (which are unavoidabl y present) and conclude that the presence of impurities is generally d etrimental, but need not be significantly damaging.