论文信息 - Temporally resolved target potential measurements in laser−target interactions

Temporally resolved target potential measurements in laser−target interactions

Rapid (100 ps) voltage oscillations have been observed in a capacitively coupled target irradiated with 3.5 ns pulses of Nd-YAG light at irradiances of between 5*1012 and 2*1015 W cm-2 on a 40 mu m spot. The measurements were made using a fast (40 ps rise-time) Pockels cell intercepting a diagnostic light pulse to a streak camera. The oscillations were found to depend on the spot size and the shape of the laser pulse. The oscillation frequencies found (up to 12 GHz) were too low to correspond to plasma instabilities. Double layers and plasma turbulence are proposed as the cause of the voltage oscillations.

[1] S. Jackel,et al. Acquisition and processing of optical two-dimensional transients using an inexpensive digital video card with an IBM personal computer , 1986 .

[2] Schmalz,et al. Laser-driven shock-wave studies using optical shadowgraphy. , 1985, Physical review. A, General physics.

[3] S. Eliezer,et al. Experimental Evidence of Charge Separation (Double Layer) in Laser-Produced Plasmas , 1985, IEEE Transactions on Plasma Science.

[4] A. Wong,et al. Trapping of plasma waves in cavitons , 1984 .

[5] S. Eliezer,et al. Double layer (DL) formation in laser-produced plasma , 1983 .

[6] A. Ehler,et al. Measurement of Return Current in a Laser-Produced Plasma , 1979 .

[7] A. Zigler,et al. The origin of Kα radiation in laser-produced aluminum plasma , 1977 .

[8] J. Pearlman,et al. Charge separation and target voltages in laser‐produced plasmas , 1977 .

[9] E. L. Lindman,et al. Theory and simulation of resonant absorption in a hot plasma , 1975 .