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A preliminary numerical experiment is conducted for laboratory experiments onthe generation of magnetized collisionless shocks with high-power lasers byusing one-dimensional particle-in-cell simulation. The present study deals withthe interaction between a moving Aluminum plasma and a Nitrogen plasma at rest.In the numerical experiment, the Nitrogen plasma is unmagnetized or magnetizedby a weak external magnetic field. Since the previous study suggested thegeneration of spontaneous magnetic field in the piston (Aluminum) plasma due tothe Biermann battery, the effect of the magnetic field is of interest. Sharpjumps of electron density and magnetic field are observed around the interfacebetween the two plasmas as long as one of the two plasmas is magnetized, whichindicates the formation of tangential electron-magneto-hydro-dynamicdiscontinuity. When the Aluminum plasma is magnetized, strong compression ofboth density and magnetic field takes place in the pure Aluminum plasma duringthe gyration of Nitrogen ions in the Aluminum plasma region. The formation of ashock downstream is indicated from the shock jump condition. The resultsuggests that the spontaneous magnetic field in the piston (Aluminum) plasmaplays an essential role in the formation of a perpendicular collisionlessshock.

physics of plasmas

Full particle-in-cell simulation of the interaction between two plasmas  for laboratory experiments on the generation of magnetized collisionless  shocks with high-power lasers