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Raman Threshold Intensity of an Electromagnetic Wave in Cluster Plasmas
Pawan K. Tiwari,Chinook Mok,Chang-Mo Ryu,Changhwan Lim,Sung-Ki Hong 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.6
An electromagnetic wave instantly converts an atomic cluster into a microsphere plasma, resulting in a displacement of the electron and the ion clouds. The electron and the Coulomb pressure cause an atomic cluster to explode and expand hydrodynamically. A nonlinear theory has been formulated to investigate the threshold intensity in cluster plasmas. A laser intensity exceeding 10¹² W/㎠ and a pulse duration of less than 1 picoseconds causes the onset of a stimulated Raman backscattered wave. An electromagnetic wave instantly converts an atomic cluster into a microsphere plasma, resulting in a displacement of the electron and the ion clouds. The electron and the Coulomb pressure cause an atomic cluster to explode and expand hydrodynamically. A nonlinear theory has been formulated to investigate the threshold intensity in cluster plasmas. A laser intensity exceeding 10¹² W/㎠ and a pulse duration of less than 1 picoseconds causes the onset of a stimulated Raman backscattered wave.