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Plasma production by multiphoton ionization: Density inhomogeneities due to ponderomotive effects

 

作者: J. R. Marque`s,   F. Amiranoff,   A. Dyson,   G. Matthieussent,   P. Benkheiri,   C. Gregory,   F. Jacquet,   Ph. Mine´,   B. Montes,   P. Poilleux,   C. Stenz,   P. Mora,   C. Goue´dard,  

 

期刊: Physics of Fluids B: Plasma Physics  （AIP Available online 1993）
卷期: Volume 5, issue 2  

页码: 597-604

 

ISSN:0899-8221

 

年代: 1993

 

DOI:10.1063/1.860491

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The generation of long and homogeneous plasmas by multiphoton ionization of low‐pressure gases—H2, D2, and N2at pressures of a few Torr—with a high‐power laser at &lgr;=0.53 &mgr;m and intensities of the order of 1015W/cm2has been studied. The temperature and density of the plasma are measured by Thomson thermal scattering. After the initial full ionization the hydrodynamic density evolution with time is observed. The comparison with a simple model shows that this evolution is mainly due to the ponderomotive force of the laser beam itself. Typical density variations range from 1% to 5% per 100 psec.

 

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