Optical Thomson scatter from laser-ablated plumes

Journal Article · Mon Jan 07 00:00:00 EST 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2830705· OSTI ID:21016251

Delserieys, A; Khattak, F Y; Lewis, C L. S.; Riley, D; Pedregosa Gutierrez, J ^[1]

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1. School of Mathematics and Physics, Queen's University, Belfast, Belfast BT71NN (United Kingdom)

We have obtained density and temperature informations on an expanding KrF laser-ablated magnesium plume via optical Thomson scatter with a frequency doubled Nd:YAG laser. The electron temperature was found to decay with the expected T{sub e}{proportional_to}t{sup -1} dependence. However, we have found the electron density to have a time dependence n{sub e}{proportional_to}t{sup -4.95} which can be explained by strong recombination processes. We also observed atomic Raman satellites originating from transitions between the different angular momentum levels of the metastable {sup 3}P{sup 0} term in Mg I.

• OSTI ID: 21016251
• Journal Information: Applied Physics Letters, Vol. 92, Issue 1; Other Information: DOI: 10.1063/1.2830705; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANGULAR MOMENTUM
BEAM-PLASMA SYSTEMS
ELECTRON DENSITY
ELECTRON TEMPERATURE
ION TEMPERATURE
KRYPTON FLUORIDE LASERS
LIGHT SCATTERING
LIGHT TRANSMISSION
MAGNESIUM
NEODYMIUM LASERS
PLASMA
PLASMA DENSITY
PLUMES
RECOMBINATION
TIME DEPENDENCE