Probing of the active layers in a capillary discharge soft X-ray laser at 18.22 nm

Lasing on the Balmer- α line of C VI at 18.22 nm has been established earlier by inducing an MHD instability in an ablative capillary made of polyacetal. Employing a multilayer mirror the beam from one end is now reflected back into the plasma column and used to probe the active medium. Amplificatio...

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Bibliographic Details
Published in:Physics letters. A 2001-12, Vol.292 (1), p.125-128
Main Authors: Ellwi, S.S, Andreić, Ž, Pleslić, S, Kunze, H.-J
Format: Article
Language:English
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Summary:Lasing on the Balmer- α line of C VI at 18.22 nm has been established earlier by inducing an MHD instability in an ablative capillary made of polyacetal. Employing a multilayer mirror the beam from one end is now reflected back into the plasma column and used to probe the active medium. Amplification is confirmed but depends on the time the beam re-enters the plasma, allowing thus to infer a lifetime of the active layers of about 400 ps. From the laser pulse with the mirror positioned 3 cm from the end of the plasma column a gain length product of GL=4.3 is derived.
ISSN:0375-9601
1873-2429
DOI:10.1016/S0375-9601(01)00788-5