Investigation of laser interaction with tungsten target by means of time-resolved optical spectroscopy

• Published in: Radiation effects and defects in solids Vol. 163; no. 4-6; pp. 569 - 577
• Main Authors: Sadowski, M. J., Skladnik-Sadowska, E., Malinowski, K., Wołowski, J., Marchenko, A. K., Tsarenko, A. V.
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 01-06-2008
• Subjects: continuum radiation; laser plasma; optical spectra; tungsten ions; tungsten lines
• ISSN: 1042-0150; 1029-4953
• DOI: 10.1080/10420150701780912

The paper reports on space- and time-resolved spectroscopic measurements performed during the interaction of an intense laser pulse (0.7 J, 2 ns) with a tungsten target, which was located inside a vacuum chamber. The optical spectra were recorded with a Mechelle®900 optical spectrometer and a CCD camera coupled with a computer equipped with the GRAMS32-v.6.0 software. Spectral lines emitted by excited tungsten atoms and single-charged tungsten ions were identified and analyzed. Using a two-step procedure for fitting the line profile, it was possible to estimate parameters of a tungsten plasma plume formed in the front of the investigated target. The appearance of the tungsten ions was also confirmed by measurements performed with an electrostatic ion-energy analyzer.