Filamentation instability of counterstreaming laser-driven plasmas

W Fox, G Fiksel, A Bhattacharjee, PY Chang… - Physical review …, 2013 - APS
Physical review letters, 2013APS
Filamentation due to the growth of a Weibel-type instability was observed in the interaction
of a pair of counterstreaming, ablatively driven plasma flows, in a supersonic, collisionless
regime relevant to astrophysical collisionless shocks. The flows were created by irradiating a
pair of opposing plastic (CH) foils with 1.8 kJ, 2-ns laser pulses on the OMEGA EP Laser
System. Ultrafast laser-driven proton radiography was used to image the Weibel-generated
electromagnetic fields. The experimental observations are in good agreement with the …
Filamentation due to the growth of a Weibel-type instability was observed in the interaction of a pair of counterstreaming, ablatively driven plasma flows, in a supersonic, collisionless regime relevant to astrophysical collisionless shocks. The flows were created by irradiating a pair of opposing plastic (CH) foils with 1.8 kJ, 2-ns laser pulses on the OMEGA EP Laser System. Ultrafast laser-driven proton radiography was used to image the Weibel-generated electromagnetic fields. The experimental observations are in good agreement with the analytical theory of the Weibel instability and with particle-in-cell simulations.
American Physical Society
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