Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Interactions of magnetized plasma flows in pulsed-power driven experiments

Journal Article · · Plasma Physics and Controlled Fusion
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [5];  [6];  [2]
  1. Imperial College, London (United Kingdom). Blackett Lab.; Imperial/ Cornell
  2. Imperial College, London (United Kingdom). Blackett Lab.
  3. Univ. Paris Sciences et Lettres (PSL) (France). Sorbonne Univ., Observatorie de Paris
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
  5. Northwest Inst. of Nuclear Technology, Xi'an (China)
  6. Univ. of Rochester, NY (United States). Dept. of Physics and Astronomy
A supersonic flow of magnetized plasma is produced by the application of a 1 MA-peak, 500 ns current pulse to a cylindrical arrangement of parallel wires, known as an inverse wire array. The plasma flow is produced by the J x B acceleration of the ablated wire material, and a magnetic field of several Tesla is embedded at source by the driving current. This setup has been used for a variety of experiments investigating the interactions of magnetized plasma flows. In experiments designed to investigate magnetic reconnection, the collision of counter-streaming flows, carrying oppositely directed magnetic fields, leads to the formation of a reconnection layer in which we observe ions reaching temperatures much greater than predicted by classical heating mechanisms. The breakup of this layer under the plasmoid instability is dependent on the properties of the inflowing plasma, which can be controlled by the choice of the wire array material. In other experiments, magnetized shocks were formed by placing obstacles in the path of the magnetized plasma flow. The pile-up of magnetic flux in front of a conducting obstacle produces a magnetic precursor acting on upstream electrons at the distance of the ion inertial length. This precursor subsequently develops into a steep density transition via ion-electron fluid decoupling. Obstacles which possess a strong private magnetic field affect the upstream flow over a much greater distance, providing an extended bow shock structure. Finally, in the region surrounding the obstacle the magnetic pressure holds off the flow, forming a void of plasma material, analogous to the magnetopause around planetary bodies with self-generated magnetic fields.
Research Organization:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Organization:
Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003764; SC0001063; SC0016215
OSTI ID:
1574793
Alternate ID(s):
OSTI ID: 23027332
Journal Information:
Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 1 Vol. 62; ISSN 0741-3335
Publisher:
IOP ScienceCopyright Statement
Country of Publication:
United States
Language:
English

References (58)

Substorm onset: Current sheet avalanche and stop layer: Current sheet avalanche journal March 2015
Magnetospheric balance of solar wind dynamic pressure: Pressure Balance With Solar Wind journal April 2017
Flows, Fields, and Forces in the Mars-Solar Wind Interaction: Mars-Solar Wind Interaction journal November 2017
High-Energy-Density Physics book January 2018
The Induced Magnetospheres of Mars, Venus, and Titan journal November 2011
Coronal mass ejections and their sheath regions in interplanetary space journal November 2017
Solar wind—magnetosphere coupling: A review of recent results journal March 2007
Magnetic Reconnection in Plasmas book January 2009
Plasmoid instability in the semi-collisional regime journal November 2018
Solar wind control of the magnetopause shape, location, and motion journal January 1991
Pressure balance between solar wind and magnetosphere journal March 1969
Detecting the orientation of magnetic fields in galaxy clusters journal May 2010
A high impedance mega‐ampere generator for fiber z ‐pinch experiments journal April 1996
Magnetohydrodynamic scaling: From astrophysics to the laboratory journal May 2001
Effect of discrete wires on the implosion dynamics of wire array Z pinches journal August 2001
Perfectly conducting incompressible fluid model of a wire array implosion journal April 2002
Measurements and simulations of the ablation stage of wire arrays with different initial wire sizes journal April 2006
Instability of current sheets and formation of plasmoid chains journal October 2007
Quantitative analysis of plasma ablation using inverse wire array Z pinches journal February 2009
The Role of Flux Advection in the Development of the Ablation Streams and Precursors of Wire Array Z-pinches
  • Greenly, John; Martin, Matthew; Blesener, Isaac
  • DENSE Z-PINCHES: Proceedings of the 7th International Conference on Dense Z-Pinches, AIP Conference Proceedings https://doi.org/10.1063/1.3079752
conference January 2009
Optical Thomson scattering measurements of cylindrical wire array parameters journal May 2012
Mechanism for magnetic field generation and growth in Rayleigh-Taylor unstable inertial confinement fusion plasmas journal August 2012
Oblique shock structures formed during the ablation phase of aluminium wire array z-pinches journal February 2013
The formation of reverse shocks in magnetized high energy density supersonic plasma flows journal May 2014
Diagnosing collisions of magnetized, high energy density plasma flows using a combination of collective Thomson scattering, Faraday rotation, and interferometry (invited) journal November 2014
Spontaneous focusing of plasma flow in a weak perpendicular magnetic field journal March 2016
Signatures of asymmetry in neutron spectra and images predicted by three-dimensional radiation hydrodynamics simulations of indirect drive implosions journal May 2016
Simulation of self-generated magnetic fields in an inertial fusion hohlraum environment journal May 2017
Formation and structure of a current sheet in pulsed-power driven magnetic reconnection experiments journal October 2017
The structure of bow shocks formed by the interaction of pulsed-power driven magnetised plasma flows with conducting obstacles journal July 2017
An experimental platform for pulsed-power driven magnetic reconnection journal May 2018
Ion heating and magnetic flux pile-up in a magnetic reconnection experiment with super-Alfvénic plasma inflows journal April 2018
Study of laser produced plasma in a longitudinal magnetic field journal June 2019
Magnetic reconnection with Sweet-Parker characteristics in two-dimensional laboratory plasmas journal May 1999
The dynamics of wire array Z-pinch implosions journal May 1999
Similarity Criteria for the Laboratory Simulation of Supernova Hydrodynamics journal June 1999
Criteria for Scaled Laboratory Simulations of Astrophysical MHD Phenomena journal April 2000
Laboratory Astrophysics and Collimated Stellar Outflows: The Production of Radiatively Cooled Hypersonic Plasma Jets journal January 2002
The measurement of ion acoustic turbulence and reduced thermal conductivity caused by a large temperature gradient in a laser heated plasma journal February 1980
Wire-array z-pinch: a powerful x-ray source for ICF journal November 2005
Magnetic reconnection: from the Sweet–Parker model to stochastic plasmoid chains journal November 2015
Stop layer: a flow braking mechanism in space and support from a lab experiment journal April 2016
Confinement of laser plasma expansion with strong external magnetic field journal March 2018
Two-colour interferometry and Thomson scattering measurements of a plasma gun journal June 2019
Observation of strong electromagnetic fields around laser-entrance holes of ignition-scale hohlraums in inertial-confinement fusion experiments at the National Ignition Facility journal February 2013
Focusing of an Explosive Plasma Expansion in a Transverse Magnetic Field journal October 2013
Structure of a Magnetic Flux Annihilation Layer Formed by the Collision of Supersonic, Magnetized Plasma Flows journal May 2016
Anomalous Heating and Plasmoid Formation in a Driven Magnetic Reconnection Experiment journal February 2017
Self-Generated Magnetic Fields in the Stagnation Phase of Indirect-Drive Implosions on the National Ignition Facility journal April 2017
Experimental Test of the Sweet-Parker Model of Magnetic Reconnection journal April 1998
Anomalous Absorption of High-Energy Green Laser Light in High- Z Plasmas journal May 2002
Magnetic reconnection journal March 2010
Colloquium : Physical constraints for the evolution of life on exoplanets journal June 2019
Exploring astrophysics-relevant magnetohydrodynamics with pulsed-power laboratory facilities journal April 2019
Magnetic draping of merging cores and radio bubbles in clusters of galaxies journal November 2006
Magnetic Reconnection in Astrophysical and Laboratory Plasmas journal September 2009
NRL Plasma Formulary report January 2007
Ion heating and magnetic flux pile-up in a magnetic reconnection experiment with super-Alfvénic plasma inflows dataset January 2018