Plasma confinement by hemispherical cavity in laser-induced breakdown spectroscopy

Journal Article · Mon Mar 28 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3573807· OSTI ID:21518351

Guo, L B; Li, C M ^[1]; Hu, W; Zhou, Y S; Zhang, B Y; Lu, Y F ^[1]; Cai, Z X; Zeng, X Y ^[2]

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1. Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0511 (United States)
2. School of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China)

An aluminum hemispherical cavity (diameter: 11.1 mm) was used to confine plasmas produced by a KrF excimer laser in air from a steel target with a low concentration manganese in laser-induced breakdown spectroscopy. A significant enhancement (factor >12) in the emission intensity of Mn lines was observed at a laser fluence of 7.8 J/cm{sup 2} when the plasma was confined by the hemispherical cavity, leading to an increase in plasma temperature about 3600 K. The maximum emission enhancement increased with increasing laser fluence. The spatial confinement mechanism was discussed using shock wave theory.

• OSTI ID: 21518351
• Journal Information: Applied Physics Letters, Vol. 98, Issue 13; Other Information: DOI: 10.1063/1.3573807; (c) 2011 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM
BREAKDOWN
CAVITIES
ELECTRON TEMPERATURE
EMISSION
ION TEMPERATURE
KRYPTON FLUORIDE LASERS
MANGANESE
PLASMA
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
PLASMA PRODUCTION
SHOCK WAVES
SPECTROSCOPY
STEELS
ALLOYS
CARBON ADDITIONS
CONFINEMENT
ELEMENTS
EXCIMER LASERS
GAS LASERS
IRON ALLOYS
IRON BASE ALLOYS
LASERS
METALS
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS