ENERGY-ABSORPTION IN PLASMAS PRODUCED BY INTENSE 10-MU-M LASER-RADIATION

被引:10
作者
VILLENEUVE, DM [1 ]
ENRIGHT, GD [1 ]
RICHARDSON, MC [1 ]
ISENOR, NR [1 ]
机构
[1] NATL RES COUNCIL CANADA,DIV PHYS,OTTAWA K1A 0R6,ONTARIO,CANADA
关键词
D O I
10.1063/1.326521
中图分类号
O59 [应用物理学];
学科分类号
摘要
Results are presented of measurements made of the fractional absorption of short (∼1 ns) intense (2×1014 W cm-2) 10.6-μm laser radiation by plasmas produced from massive plane targets. Two complementary techniques were used: infrared light accounting and plasma calorimetry. The methods are shown to provide consistent results, demonstrating peak absorptions of up to 50%. The beam-polarization and irradiance-angle dependence of the absorption is consistent with a resonance absorption model. Plasma calorimetry also yields a detailed spatial distribution of the particle emission, while infrared calorimetry shows that the scattered laser light distribution is strongly dependent on the polarization of the incident laser beam.
引用
收藏
页码:3921 / 3927
页数:7
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