Abstract
Collisionless shocks are produced in counter-streaming plasmas with an external magnetic field. The shocks are generated due to an electrostatic field generated in counter-streaming laser-irradiated plasmas, as reported previously in a series of experiments without an external magnetic field [T. Morita et al ., Phys. Plasmas, 17, 122702 (2010), Kuramitsu et al ., Phys. Rev. Lett., 106, 175002 (2011)] via laser-irradiation of a double-CH-foil target. A magnetic field is applied to the region between two foils by putting an electro-magnet (∼10 T) perpendicular to the direction of plasma expansion. The generated shocks show different characteristics later in time (t > 20ns).
Highlights
The aim of the research is to study collisionless shocks as observed in supernova remnants (SNRs) and to find the physics of collisionless shock formation
Collisionless shocks are produced in counter-streaming plasmas with an external magnetic field
We have studied collisionless shocks with high-power laser-produced counter-streaming plasmas [3, 4]
Summary
The aim of the research is to study collisionless shocks as observed in supernova remnants (SNRs) and to find the physics of collisionless shock formation This aims at the physics of particle acceleration relating to the origin of cosmic-rays. The diffusive shock acceleration (DSA) is the standard model for the acceleration of cosmic-rays It is, impossible to directly measure the accelerated particles by shocks at SNRs and to measure various parameters such as electric and magnetic fields at the shocks. Using streaked optical pyrometry (SOP) and streaked interferometry (SIF), time evolution of high Mach-number ES shocks has been observed [4]. These experiments, have been performed without an external magnetic field
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