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Increase of the saturation power may be approached by means of the parameter adjustment even in a uniform wiggler configuration, which is comparable to the enhancement by using a tapered wiggler. Instead of the beam-wave interaction being lengthened by the use of a wiggler taper, a substantial saturation length may be shortened by virtue of the parameter adjustment.
We have demonstrated an intense plasma-based THz source using ~5 TW femtosecond laser pulses to irradiate solid targets. The energy of a single THz pulse emitted in the laser specular direction increases with the laser energy. The maximum THz energy can be as high as tens μJ/sr. The polarization of the THz pulse is measured to be linear.
Summary form only given. The effects of preplasma on lateral fast electron transport at front target surface irradiated by ultraintense (>1018 W/cm2) laser pulses are experimentally investigated. A spherically bent quartz crystal is used to record two-dimensional spatially resolved Kα x-ray emission resulting from fast electron transport. A large (~ 600μm in diameter) annular Kα halo structure...
We have demonstrated an intense plasma-based THz source using ~5 TW femtosecond laser pulses to irradiate solid targets. The energy of a single THz pulse emitted in the laser specular direction increases with the laser energy. The maximum THz energy can be as high as tens μJ/sr. The polarization of the THz pulse is measured to be linear.
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