TITLE

Influence of the density gradient on the duration of Si-Kα pulses generated by a double femtosecond-laser pulse

AUTHOR(S)
Pisani, F.; Andiel, U.; Eidmann, K.; Witte, K.; Uschmann, I.; Morak, A.; Förster, E.; Sauerbrey, R.
PUB. DATE
April 2004
SOURCE
Applied Physics Letters;4/12/2004, Vol. 84 Issue 15, p2772
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have studied the duration of Si-Kα x-ray pulses generated by two subsequent femtosecond-laser pulses (λ=395 nm, pulse duration=180 fs) separated by 20 ps, which were focused on a glass target to intensities of a few 1017 W/cm2. A toroidally bent crystal was used to image the Si-Kα pulses emitted by the target on the cathode of an ultrafast streak camera. While the duration of the first Kα pulse is 1.1 ps, the duration of the second Kα pulse is considerably longer by ≈0.7 ps. This effect is attributed to the preplasma created by the first laser pulse and seen by the second one. © 2004 American Institute of Physics.
ACCESSION #
12754141

 

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