Nitrogen laser beam interaction with copper surface

Znanstveni rad - Izvorni znanstveni rad

• Autor: Višnja Henč-Bartolić
• Autor: Željko reić
• Autor: Mirko Stubičar
• Autor: Hans-Joachim Kunze
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

The ultraviolet and visible spectra of plasmas produced by N_2-laser radiation focused onto a copper target in air and in vacuum have been recorded photographically. The nitrogen laser beam (α = 337 nm) had a maximum energy density of 1.1 J/cm^2, the pulse duration was 6 ns, and the repetition rate 0.2 Hz. The measured electron temperature was 15000 K (±30%) in air and 13000 K (±50%) in vacuum and the electron densities were 6.5×10^17 cm^-3 (±60%) and 3.0×10^17 cm^-3 (±60%), respectively. The irradiated surface in air and in vacuum was studied employing a metallographic microscope. In vacuum, the droplets were created and expulsed at the crater edges. Their formation is explained by the hydrodynamical model. They were formed in a time interval which is about two times shorter than the duration of the laser pulse. In air, droplets were also formed. The weight loss from the Cu-crater in vacuum was about 0.3×10^-4 µmole/pulse, in air it was about three times less.

• Ključne riječi (engleski): laser-induced plasma; N2-laser radiation; short pulses; Copper surface
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Fizika A
• Brojčani podaci: vol. 7, br. 4, str. 205-212
• p-ISSN: 1330-0008
• URN:NBN: urn:nbn:hr:217:879355
• Datum objave publikacije: 1998
• URL dokumenta: http://fizika.hfd.hr/fizika_a/av98/a7p205.htm
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2019-10-04 16:08:37