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Conversion of laser light into soft X rays with 3-ns and 30-ps laser pulses

Published online by Cambridge University Press:  09 March 2009

K. Eidmann  and
W. Schwanda
K. Eidmann
Affiliation:
Max-Planck-Institut für Quantenoptik, D-8046 Garching, Germany
W. Schwanda
Affiliation:
Max-Planck-Institut für Quantenoptik, D-8046 Garching, Germany
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Abstract

The X-ray emission from planar targets made of aluminum, copper, or gold irradiated by a frequency-doubled Nd laser (530-nm wavelength and 1012–1014-W/cm2 laser intensity) was measured at two pulse durations: 3 ns and 30 ps. We absolutely measured the X-ray emission with spectral, temporal, and spatial resolution in the wavelength range 3 Å < λ < 250 Å by using filtered bolometers, a transmission grating spectrometer, X-ray diodes, and an X-ray streak camera as diagnostics. In addition, the absorption of laser light was measured. For the short, 30-ps laser pulse the conversion of incident laser energy into X rays was considerably less than that with the long, 3-ns pulse. This is caused by less absorption of laser light and, in addition, by less conversion of absorbed laser energy into X rays in the case of the short pulse. The results are compared with numerical simulations performed with the MULTI hydrocode.

Type
Research Article
Information
Laser and Particle Beams , Volume 9 , Issue 2 , June 1991 , pp. 551 - 562
Copyright
Copyright © Cambridge University Press 1991

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