Experimental Observation of Ultra-Slow Electron-Lattice Coupling in Highly Non-Equilibrium Graphite
Institute of Electrical and Electronics Engineers (IEEE) 1 (2012) 1p-186-1p-186
X-RAY SPECTRA OF LASER IRRADIATED METAL FOILS FOR X-RAY THOMSON SCATTERING OF WARM DENSE MATTER ON THE Z-ACCELERATOR
Institute of Electrical and Electronics Engineers (IEEE) 1 (2012) 115-120
X-Ray Scattering from Warm Dense Iron* *Work supported by EPSRC grant EP/G007462/01
Institute of Electrical and Electronics Engineers (IEEE) (2012) 1c-3-1c-3
Characterizing counter-streaming interpenetrating plasmas relevant to astrophysical collisionless shocks
Physics of Plasmas 19:5 (2012)
Abstract:
A series of Omega experiments have produced and characterized high velocity counter-streaming plasma flows relevant for the creation of collisionless shocks. Single and double CH2 foils have been irradiated with a laser intensity of ∼ 1016 W/cm2. The laser ablated plasma was characterized 4 mm from the foil surface using Thomson scattering. A peak plasma flow velocity of 2000 km/s, an electron temperature of ∼ 110 eV, an ion temperature of ∼ 30 eV, and a density of ∼ 1018 cm -3 were measured in the single foil configuration. Significant increases in electron and ion temperatures were seen in the double foil geometry. The measured single foil plasma conditions were used to calculate the ion skin depth, c/ωpi ∼ 0.16 mm, the interaction length, lint, of ∼ 8 mm, and the Coulomb mean free path, λmfp ∼ 27 mm. With c/ωpi ≪ l int ≪λmfp, we are in a regime where collisionless shock formation is possible. © 2012 American Institute of Physics.Design considerations for unmagnetized collisionless-shock measurements in homologous flows
Astrophysical Journal 749:2 (2012)