Strong shock-phenomena at petawatt-picosecond laser side-on ignition fusion of uncompressed hydrogen-boron11 |
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Authors: | Heinrich Hora George H Miley Xiaoling Yang Paraskevas Lalousis |
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Institution: | 1.Department of Theoretical Physics,University of New South Wales,Sydney,Australia;2.Department of Nuclear, Plasma and Radiological Engineering,University of Illinois,Urbana,USA;3.Institute of Electronic Structure and Laser FORTH,Heraklion,Greece |
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Abstract: | An extreme anomaly of laser-plasma interaction with petawatt-picosecond (PW-ps) pulses of very high contrast ratio for suppression
of relativistic self-focusing permitted a come-back of the Bobin-Chu side-on ignition of uncompressed deuterium-tritium (DT)
fusion fuel. The plasma blocks for the side-on ignition have to be produced by the well confirmed nonlinear force acceleration
which is about 100,000 times higher than thermo-kinetic fluid-dynamic acceleration for comparison with astrophysical cases.
It is essential that the dielectric plasma properties within the nonlinear force are used. Using the measured ion beam densities
above 1011 A s/cm2 the ignition mechanism needed numerical and theoretical studies of extremely strong shock phenomena. When extending these
results to the side-on ignition of uncompressed hydrogen-boron11 (HB11), surprisingly, the ignition by this shock mechanism
was only about 10 times more difficult than for DT in contrast to ignition by spherical laser driven compression using thermo-kinetic
conditions in which case HB11 ignition is 100,000 times more difficult than DT. |
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