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Study of optical emission from laser-produced plasma expanding across an external magnetic field

Published online by Cambridge University Press:  22 July 2003

VIRENDRA N. RAI ,
JAGDISH P. SINGH ,
FANG Y. YUEH  and
ROBERT L. COOK
VIRENDRA N. RAI
Affiliation:
Diagnostic Instrumentation and Analysis Laboratory, Mississippi State University, Starkville, Mississippi Permanent address: Centre for Advanced Technology, Indore-452 013, India.
JAGDISH P. SINGH
Affiliation:
Diagnostic Instrumentation and Analysis Laboratory, Mississippi State University, Starkville, Mississippi
FANG Y. YUEH
Affiliation:
Diagnostic Instrumentation and Analysis Laboratory, Mississippi State University, Starkville, Mississippi
ROBERT L. COOK
Affiliation:
Diagnostic Instrumentation and Analysis Laboratory, Mississippi State University, Starkville, Mississippi
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Abstract

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The laser-induced plasma obtained from the liquid target and expanding across a steady magnetic field has been studied using atomic emission spectroscopy. The line emission from the plasma was enhanced (>1.5 times) in the presence of a magnetic field, whereas background emission decreases. Enhancement in line intensity was found to be mainly a function of plasma beta (β). An increased rate of three-body recombination in plasma particles due to the cooling of the plasma during its expansion and an increase in effective plasma density as a result of its confinement seems to be the reason behind this enhancement.

Keywords

Laser-produced plasmaLaser-induced breakdown spectroscopyMagnetic confinementPlasma emission
Type
Research Article
Information
Laser and Particle Beams , Volume 21 , Issue 1 , January 2003 , pp. 65 - 71
Copyright
2003 Cambridge University Press