skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Characterization of laser-produced carbon plasmas relevant to laboratory astrophysics

Authors:
 [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]
  1. Department of Physics and Astronomy, University of California - Los Angeles, Los Angeles, California 90095, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1268440
Grant/Contract Number:
NA0001995; SC0006538:0003
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 4; Related Information: CHORUS Timestamp: 2018-03-09 12:07:37; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Schaeffer, D. B., Bondarenko, A. S., Everson, E. T., Clark, S. E., Constantin, C. G., and Niemann, C. Characterization of laser-produced carbon plasmas relevant to laboratory astrophysics. United States: N. p., 2016. Web. doi:10.1063/1.4959148.
Schaeffer, D. B., Bondarenko, A. S., Everson, E. T., Clark, S. E., Constantin, C. G., & Niemann, C. Characterization of laser-produced carbon plasmas relevant to laboratory astrophysics. United States. doi:10.1063/1.4959148.
Schaeffer, D. B., Bondarenko, A. S., Everson, E. T., Clark, S. E., Constantin, C. G., and Niemann, C. Fri . "Characterization of laser-produced carbon plasmas relevant to laboratory astrophysics". United States. doi:10.1063/1.4959148.
@article{osti_1268440,
title = {Characterization of laser-produced carbon plasmas relevant to laboratory astrophysics},
author = {Schaeffer, D. B. and Bondarenko, A. S. and Everson, E. T. and Clark, S. E. and Constantin, C. G. and Niemann, C.},
abstractNote = {},
doi = {10.1063/1.4959148},
journal = {Journal of Applied Physics},
number = 4,
volume = 120,
place = {United States},
year = {Fri Jul 22 00:00:00 EDT 2016},
month = {Fri Jul 22 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4959148

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

Save / Share:
  • We introduce the equations of magneto-quantum-radiative hydrodynamics. By rewriting them in a dimensionless form, we obtain a set of parameters that describe scale-dependent ratios of characteristic hydrodynamic quantities. We discuss how these dimensionless parameters relate to the scaling between astrophysical observations and laboratory experiments.
  • Collisionless shocks are often observed in fast-moving astrophysical plasmas, formed by non-classical viscosity that is believed to originate from collective electromagnetic fields driven by kinetic plasma instabilities. However, the development of small-scale plasma processes into large-scale structures, such as a collisionless shock, is not well understood. It is also unknown to what extent collisionless shocks contain macroscopic fields with a long coherence length. For these reasons, it is valuable to explore collisionless shock formation, including the growth and self-organization of fields, in laboratory plasmas. The experimental results presented here show at a glance with proton imaging how macroscopic fields canmore » emerge from a system of supersonic counter-streaming plasmas produced at the OMEGA EP laser. Interpretation of these results, plans for additional measurements, and the difficulty of achieving truly collisionless conditions are discussed. Future experiments at the National Ignition Facility are expected to create fully formed collisionless shocks in plasmas with no pre-imposed magnetic field.« less
  • We report a laser experiment of astrophysical interest on radiative jet formation. Conically shaped targets are irradiated by intense laser light. An ablated plasma flow collides at the axis of the cone targets, then propagates at high Mach number, forming a jetlike structure. We measure time-resolved x-ray self-emission images from the jets. The diameter of the jet increases with decreasing atomic number of the irradiated target, suggesting that the collimation is due to radiative cooling. Two-dimensional simulations reproduce essential features of the experimental results.
  • We report that the collimation of astrophysically-relevant plasma ejecta in the form of narrow jets via a poloidal magnetic field is studied experimentally by irradiating a target situated in a 20 T axial magnetic field with a 40 J, 0.6 ns, 0.7 mm diameter, high-power laser. The dynamics of the plasma shaping by the magnetic field are studied over 70 ns and up to 20 mm from the source by diagnosing the electron density, temperature and optical self-emission. These show that the initial expansion of the plasma is highly magnetized, which leads to the formation of a cavity structure whenmore » the kinetic plasma pressure compresses the magnetic field, resulting in an oblique shock [A. Ciardi et al., Phys. Rev. Lett. 110, 025002 (2013)]. The resulting poloidal magnetic nozzle collimates the plasma into a narrow jet [B. Albertazzi et al., Science 346, 325 (2014)]. At distances far from the target, the jet is only marginally magnetized and maintains a high aspect ratio due to its high Mach-number (M~20) and not due to external magnetic pressure. The formation of the jet is evaluated over a range of laser intensities (10 12–10 13 W/cm 2), target materials and orientations of the magnetic field. Lastly, plasma cavity formation is observed in all cases and the viability of long-range jet formation is found to be dependent on the orientation of the magnetic field.« less
  • Cited by 2