Laboratory simulation of supernova shockwave propagation

Details Laboratory simulation of supernova shockwave propagation Laboratory simulation of supernova shockwave propagation

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..dppgp1060h&link_type=abstract

American Physical Society, 44th Annual Meeting of the Division of Plasma , abstract #GP1.060

Physics

Scientific paper

High Mach number shockwaves were launched in laboratory plasmas to simulate supernova shockwave propagation through an interstellar medium. Shockwaves were created by focusing a high power infrared (1064 nm) pulsed laser onto the tip of a metal pin. Laser energies ranged from 2.0 J to 146.8 J. The pin was located in a vacuum chamber backfilled with a gas representing the interstellar medium. Both xenon and nitrogen gas were used, to study the effect with or without radiative preheating ahead of the shock. The typical gas pressure was 0.7 kPa. Some shockwaves were allowed to interact with a wire array (0.2 mm wire diameter with 3 mm spacing placed 20 mm from pin). The shock was backlit with a green (532 nm) laser, to deduce shock structures and densities from Schlieren and interferometry image. Emission spectroscopy data in the near ultraviolet range were also obtained to infer electron temperatures ahead of and behind the shock. Preliminary results indicate that the shock velocity follows the Taylor-Sedov blast wave relation. No shock instabilities were observed in either xenon or nitrogen, including when the wire array was present to perturb the shock (perturbations were observed to oscillate but dampen out). Earlier work in this field has reported unstable shockwaves in xenon, which is different from our result. Further data analysis is underway, and results will be presented.

Affiliated with

Also associated with

No associations

Rating

Laboratory simulation of supernova shockwave propagation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Laboratory simulation of supernova shockwave propagation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laboratory simulation of supernova shockwave propagation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-736067