Efficient heating of near-surface plasmas with femtosecond laser pulses stimulated by nanoscale inhomogeneities

Abstract

The gamma-ray blazar 1611+343 was observed with polarization VLBI mode at 5 GHz in February 1999. The total intensity (I) VLBI image of the source shows a core-jet structure. The jet bends eastward at ∼ 3 mas south of the core. Four components have been detected from results of fitting, with apparent speeds estimated at 6.7 ± 0.7, 2.5 ± 0.3, 4.5 ± 0.5 h −1 c for three jet components (taking H 0 = 100 h km s −1 Mpc −1 , q 0 = 0.5). The polarization (P ) VLBI image of 1611+343 displays the polarized configuration in the jet. The mechanism of the curved jet is discussed.

Simulations of short pulses laser interaction with targets having a submicron surface structure: energy absorption and ion acceleration

“…The laser energy absorption may be boosted by the presence of microscopic structures on the laser irradiated target surface as demonstrated in recent experiments 10,11,12,13,14,15,16,17 and simulations 18,19,20,21,22 . According to PIC simulations 23 , the presence of surface micro-structure with the size comparable to the wavelength of the laser pulse significantly increases energy of ions emitted from the rear side of the target if the target is thin enough and the laser contrast is sufficiently high.…”

Microjet formation and hard x-ray production from a liquid metal target irradiated by intense femtosecond laser pulses

“…Such an effect of more efficient laser energy absorption and fast electron generation could be similar to the enhancement of laser pulse absorption of a structured surface of solid targets. [11][12][13] However, liquid targets present advantages of dynamic surface microstructuring using a laser FIG. 7.…”