Title :
Time-resolved X-ray spectroscopy of ultrashort plasmas
Author :
Cote, C.Y. ; Kieffer, John C. ; Chaker, Mohamed ; Beaudoin, Y. ; Jiang, Z. ; Mens, A. ; Verrecchia, R. ; Sauneuf, R. ; Schirmann, C.
Author_Institution :
INRS-Energie et Materiaux, Varennes, Que., Canada
Abstract :
Summary form only given. Results obtained at INRS by using the C850X streak camera are discussed. The experiments were carried out using the INRS Table Top Terawatt 500-fs laser (1.053 /spl mu/m) at an intensity of 10/sup 16/ to 10/sup 17/ W/cm/sup 2/. Time-resolved spectra have been obtained for non-beam irradiation at 1 /spl mu/m and 0.53 /spl mu/m. The cold K/spl alpha/ emission is time-resolved, giving access to the time history of the hot electron generation processes. Time-resolved keV spectra have also been obtained with two colinear 0.53 /spl mu/m pulses incident on Al targets and separated by an adjustable delay (0-100 ps). In this experiment, very clean pulses (10/sup 10/:1 intensity contrast ratio) have been used. The first pulse creates a preplasma and the time delay between the two pulses makes it possible to adjust the density of the target at which the second pulse produces the X-ray emission. Control of the brightness and of the emission duration of the ultrafast X-ray source is thus achieved.
Keywords :
plasma diagnostics; 0.53 micron; 1 micron; 1.053 micron; 500 fs; Al; C850X streak camera; K/spl alpha/ emission; X-ray emission; X-ray spectroscopy; density; emission duration; hot electron generation processes; nonbeam irradiation; preplasma; time history; ultrafast X-ray source; ultrashort plasmas; Cameras; Electron emission; History; Laser beams; Optical pulses; Plasma density; Plasma x-ray sources; Production; Spectroscopy; X-ray lasers;
Conference_Titel :
Plasma Science, 1993. IEEE Conference Record - Abstracts., 1993 IEEE International Conference on
Conference_Location :
Vancouver, BC, Canada
Print_ISBN :
0-7803-1360-7
DOI :
10.1109/PLASMA.1993.593418
