Emission properties of suprathermal electrons produced by laser–plasma interactions. (26th October 2017)

• Record Type: Journal Article
• Authors: Liu, Huiya; Kang, Ning; Zhou, Shenlei; An, Honghai; Fang, Zhiheng; Xiong, Jun; Li, Kun; Lei, Anle; Lin, Zunqi
• Is Part Of: Laser and particle beams. Volume 35:Number 4(2017)
• Page Start: 663
• Page End: 669
• Publication Date: 2017-10-26
• Subjects: inertial confinement fusion, -- laser–plasma interactions, -- laser-produced plasma, -- suprathermal electron; Laser beams -- Periodicals; Particle beams -- Periodicals; 535.5
• DOI: 10.1017/S0263034617000702
• Languages: English
• ISSNs: 0263-0346

Abstract

Abstract: Suprathermal electrons produced by laser–plasma interactions at 0.53-μm laser wavelength have been investigated using 19 electron spectrometers. The targets were 2- and 10-μm-thick Al foils, while the laser average intensities were 2 × 10 13 and 7 × 10 14 W/cm 2 . A double temperature distribution was observed in the electron energy spectrum: the lower electron temperature was below 25 keV, whereas the higher was ~50 keV. The angular distribution of the total suprathermal electron energy approximately obeyed the Gaussian distribution, peaking along thek vector of the incident laser beam for perpendicular incidence. Furthermore, the conversion rate of laser energy into escaped suprathermal electron energy over the π sr solid angle was ~10 −4 at $\sim \!\!10^{14} \; {\rm W}/{\rm c}{\rm m}^{\rm 2}$, increasing almost linearly with the laser intensity.