X-ray lasing as a result of an induced instability in an ablative capillary discharge

TitleX-ray lasing as a result of an induced instability in an ablative capillary discharge
Publication TypeJournal Article
Year of Publication2001
AuthorsS.S Ellwi, L. Juschkin, S. Ferri, H.J Kunze, K.N Koshelev, E. Louis
JournalJournal of Physics D-Applied Physics
Volume34
Number3
Pagination336-339
Date PublishedFeb 7
ISBN Number0022-3727
Abstract

We report lasing of the CVI Balmer-alpha line at 18.22 nm using the new technique of an induced MHD instability in an ablative capillary discharge. A large spike of this line during the second half-cycle of the discharge is observed. The spike is identified as amplified spontaneous emission (ASE), and enhancements are derived for capillaries of lengths between 15 and 50 mm. We explain the ASE as a result of charge exchange processes which occur between ions produced in the neck of the MHD instability and low temperature ions present in the same plasma column. To emphasize this instability, we implemented a new method by using a straight capillary with a waved structure imprinted inside. The results are encouraging and an exponential gain length is achieved with GL = 4.5 for a 40 mm length capillary. Other evidence to support the observation is realised when a plane multilayer mirror with reflectivity

DOI10.1088/0022-3727/34/3/315
PID

009d73cfa5a20fc75e7c624d85880fac

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