Pregled bibliografske jedinice broj: 64776
Plasma plumes generated by laser ablation of capillaries
Plasma plumes generated by laser ablation of capillaries // 6th International Conference on X-Ray Lasers, Kyoto, Japan 31.8-4.9 1998, book of abstracts 149
Kyoto, Japan: IOP Publishing, 1999. str. 495-498 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
Plasma plumes generated by laser ablation of capillaries
Autori
Andreić, Željko ; Aschke, Lutz ; Kunze, Hans-Joachim
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
6th International Conference on X-Ray Lasers, Kyoto, Japan 31.8-4.9 1998, book of abstracts 149
/ - : IOP Publishing, 1999, 495-498
Skup
6th International Conference on X-Ray Lasers
Mjesto i datum
Kyoto, Japan, 31.08.1998. - 04.09.1998
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
PACS: 5250J: Plasma production and heating by laser beams
Sažetak
Ablation of a capillary wall by laser radiation focused into the opening of the capillary produces two plasma plumes with different physical characteristics. One plume is mainly generated by the outer rim of the laser beam hitting the front surface of the target around the front entrance of the capillary, and the other is generated inside the capillary by that part of the laser beam that enters the capillary and is guided through it by reflections at the wall. Some of the plasma generated inside the capillary expands from the back opening into the surrounding space thus producing the second plasma plume. Our experiments on laser ablation of aluminum capillaries (1--2 mm in length, 0.5 mm in diameter) with ruby laser pulses (1 kJ/cm2 on target, 15 ns FWHM) show that the front plasma plume is very similar to the plume generated by laser ablation of a solid target surface while the plume observed behind the capillary is much colder and more rarefied. Its characteristics and usability in pulsed laser deposition techniques are currently being evaluated. We were able to study the plasma inside the capillary itself, by taking ist spectra through a miniature hole bored in the side of a capillary wall. As it was recently shown that plasmas in capillaries are of considerable interest as initial plasmas for generating Xray laser pulses by optical field ionization of preformed plasma by a second intense picosecond laser pulse. In this case the presence of a significant amount of plasma outside the capillary is actually a drawback, a fact that also supports the need for further study of the plasmas present outside the capillary.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
