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Study of laser-produced plasmas from boron, carbon and boron-carbide targets

Sažetak

Spectroscopic investigations were made on plasma clouds created by 20 ns, 3 J ruby laser pulses impinging perpendicularly onto targets of boron carbide, carbon and boron. The irradiance on the targets was about 132 GW cm-2. Time-resolved spectra of plasmas in the region of wavelength from 16 to 32 nm were observed at a distance of 1 mm from the targets. The maximum electron temperatures were about 60 eV in the case of carbon and boron targets, and about 45 eV in the case of boron-carbide target. Laser evaporation from carbon occurred directly from the solid state (sublimation), and in the case of a boron and boron-carbide melting was observed as an intermediate state.

Ključne riječi

laser-produced plasmas from boron; carbon and boron-carbide (B4C) targets; spectral analysis; light-microscopic surface observation

Hrčak ID:

301567

URI

https://hrcak.srce.hr/301567

Datum izdavanja:

1.10.2001.

Podaci na drugim jezicima: hrvatski

Posjeta: 610 *