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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/2393

Title: Twin peak distribution of electron emission profile and impact ionization of ambient molecules during laser ablation of silver target
Authors: Riju, C Issac
Pramod, Gopinath
Geetha K, Varier
Nampoori, V P N
Vallabhan, C P G
Technology
Keywords: Fluids
Plasmas
Electrical Discharges
Issue Date: 13-Jul-1998
Publisher: American Institute of Physics
Abstract: Laser-induced plasma generated from a silver target under partial vacuum conditions using the fundamental output of nanosecond duration from a pulsed Nd:yttrium aluminum garnet laser is studied using a Langmuir probe. The time of flight measurements show a clear twin peak distribution in the temporal profile of electron emission. The first peak has almost the same duration as the laser pulse while the second lasts for several microseconds. The prompt electrons are energetic enough ('60 eV) to ionize the ambient gas molecules or atoms. The use of prompt electron pulses as sources for electron impact excitation is demonstrated by taking nitrogen, carbon dioxide, and argon as ambient gases.
URI: http://dyuthi.cusat.ac.in/purl/2393
Appears in Collections:Dr.C P Girijavallabhan

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