Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session NP11: Poster Session V: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: Stellerators
HED: High Energy Density
BEAMS: Short Pulse Laser Plasmas
HED: Short Pulse Laser Plasma
SPACE: Space Plasmas
9:30 AM - 12:30 PM
Wednesday, October 19, 2022
Room: Exhibit Hall A and Online
Abstract: NP11.00078 : Magnetized collisionless shock experiments on a pulsed power driven platform*
Presenter:
Lee G Suttle
(Imperial College London)
Authors:
Lee G Suttle
(Imperial College London)
Jack W Halliday
(Imperial College London)
Stefano Merlini
(Imperial College London)
Danny R Russell
(Imperial College London)
Vicente Valenzuela-Villaseca
(Imperial College London)
Sergey V Lebedev
(Imperial College London)
We present the development and first data from a platform to study collisionless shocks using a pulsed power driver. The setup fielded on the MAGPIE generator (1.4 MA, 500 ns current drive) at Imperial College utilizes two side-by-side inverse wire arrays to produce counter-streaming, supersonic flows of plasma ablated from metal wires. Similar setups have previously been used to study plasma interactions including shocks, instabilities and magnetic reconnection in the collisional regime.
To access a collisionless regime (L < λii ~1/V4), the velocity difference between the flows is maximized by increasing the magnetic field accelerating the flows via the JxB force. Meanwhile, the number and thickness of wires in one array is reduced to transition from steady ablative behavior to an explosive ejection of material into the oncoming flow.
The dynamics of the interaction are captured using multi-frame, self-emission imaging (optical & XUV) and a suite of laser based diagnostics (interferometry, Thomson scattering, Faraday rotation imaging) allows the parameters and structure of the interactions to be measured.
*This work was supported by the U.S. Department of Energy (DOE) under Award Nos. DE-SC0020434 and DE-NA0003764, and by the U.S. Defense Threat Reduction Agency (DTRA) under Award No. HDTRA1-20-1-0001.
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