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Advanced Energy Technology Group Seminar Series


30 October 2003
10:00 AM
479 EBU-II, UC San Diego

Energy Absorption and Propagation Characteristics of Laser Induced Sparks

Bindhu Harilal

ABSTRACT:

Interest in gas breakdown with laser radiation is the result of a number of potential applications for high temperature and high density plasmas. When a high power laser is focused in a volume of gas, a dense plasma is formed. Formation of such laser induced sparks is studied in the present work. 532-nm pulses from a frequency-doubled Nd:YAG laser are used to create the spark in air and argon. 2-ns gated fast photography and optical emission spectroscopy are the main diagnostics employed. Properties such as spark absorption, spark evolution, laser propagation through the spark etc. will be discussed.

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