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26 Apr 2010

Volume 96, Issue 17, Articles (17xxxx)

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Appl. Phys. Lett. 96, 173501 (2010); http://dx.doi.org/10.1063/1.3409475 (3 pages)

Seoung-Ki Lee, Houk Jang, Musarrat Hasan, Jae Bon Koo, and Jong-Hyun Ahn
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Supersonic regimes of plasma expansion during optical breakdown in air

Alexey A. Ilyin, Ivan G. Nagorny, and Oleg A. Bukin

Appl. Phys. Lett. 96, 171501 (2010); http://dx.doi.org/10.1063/1.3421537 (2 pages) | Cited 3 times

Online Publication Date: 27 April 2010

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Expansion regimes of plasma (fast ionization wave, laser supported radiation wave, and laser supported detonation wave) produced by laser–induced breakdown in air have been studied. To determine a pattern of plasma expansion a numerical investigation of propagation velocity dependence on laser radiation intensity was used. Calculation results agree with the experimental data and show that the most expected high-speed mechanism is fast ionization wave.
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52.40.Mj Particle beam interactions in plasmas

Temporary-resolved measurement of electron density in small atmospheric plasmas

A. Shashurin, M. N. Shneider, A. Dogariu, R. B. Miles, and M. Keidar

Appl. Phys. Lett. 96, 171502 (2010); http://dx.doi.org/10.1063/1.3389496 (3 pages) | Cited 4 times

Online Publication Date: 27 April 2010

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A new method for temporally resolved measurements of absolute values of plasma density applicable for wide spectrum of small-size atmospheric plasmas and utilizing Rayleigh microwave scattering on the tested plasma object is proposed. The absolute electron density measurements in an atmospheric plasma jet revealed presence of two consecutive breakdowns during the half-wave of the discharge-driven high voltage. The ionization mechanisms of both breakdowns are considered.
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52.70.Gw Radio-frequency and microwave measurements
52.50.Dg Plasma sources
52.20.-j Elementary processes in plasmas
52.80.-s Electric discharges
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