Y Tao et al 2006 J. Phys. D: Appl. Phys. 39 4027 doi:10.1088/0022-3727/39/18/014
Effect of shockwave-induced density jump on laser plasma interactions in low-pressure ambient air
Y Tao, M S Tillack, S S Harilal, K L Sequoia, B O'Shay and F Najmabadi
Show affiliationsThe dynamics of laser-produced plasma (LPP) and its shockwave-induced density jump (SIDJ) were investigated in low-pressure ambient air during the laser pulse using an optical interferometer. A tiny SIDJ could be observed clearly in ambient air with pressure as low as 3 Torr even during the rising edge of a 7 ns laser pulse. It was shown that the density jump and ionization could seed laser-induced ambient air breakdown at a relatively low pressure, which could significantly reduce laser energy deposited in the LPP. The ionization of the density jump was confirmed by dynamic emission imaging.
- PACS
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52.38.-r Laser-plasma interactions
- Subjects
- Dates
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Issue 18 (21 September 2006)
Received 20 May 2006, in final form 18 July 2006
Published 1 September 2006
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Effect of shockwave-induced density jump on laser plasma interactions in low-pressure ambient air
Y Tao et al 2006 J. Phys. D: Appl. Phys. 39 4027
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