Hot electron production in laser solid interactions with a controlled pre-pulse

プリパルスの制御によるレーザー・固体相互作用に夜高温電子生成

Culfa, O.*; Tallents, G. J.*; Wagenaars, E.*; Ridgers, C. P.*; Dance, R. J.*; Rossall, A. K.*; Gray, R. J.*; McKenna, P.*; Brown, C. D. R.*; James, S. F.*; Hoarty, D. J.*; Booth, N.*; Robinson, A. P. L.*; Lancaster, K. L.*; Pikuz, S. A.*; Faenov, A. Ya.*; Kampfer, T.*; Schulze, K. S.*; Uschmann, I.*; Woolsey, N. C.*

Culfa, O.*; Tallents, G. J.*; Wagenaars, E.*; Ridgers, C. P.*; Dance, R. J.*; Rossall, A. K.*; Gray, R. J.*; McKenna, P.*; Brown, C. D. R.*; James, S. F.*; Hoarty, D. J.*; Booth, N.*; Robinson, A. P. L.*; Lancaster, K. L.*; Pikuz, S. A.*; Faenov, A. Ya.*; Kampfer, T.*; Schulze, K. S.*; Uschmann, I.*; Woolsey, N. C.*

Hot electrons of temperature up to 10-20 MeV have been produced by high contrast picosecond duration laser pulses focused to intensities of 10 Wcm with a deliberate pre-pulse on solid targets using the Vulcan Petawatt Laser facility. The measurement of the number and temperature of hot electrons obtained using an electron spectrometer. The results are correlated to the density scale length of the plasma produced by a controlled pre-pulse measured using an optical probe diagnostic. The experimental results show that longer interaction plasmas produced by pre-pulses enable significantly greater number of hot electrons to be produced.