Bulletin of the American Physical Society
60th Annual Meeting of the APS Division of Plasma Physics
Volume 63, Number 11
Monday–Friday, November 5–9, 2018; Portland, Oregon
Session CP11: Poster Session II: Basic Plasma Physics; Boundary, PMI, Proto-MPEX; International Tokamaks; Turbulence and Transport; Other Configurations; Z-pinch, Dense Plasma Focus and MagLIF (2:00pm-5:00pm)
Monday, November 5, 2018
OCC Room: Exhibit Hall A1&A
Abstract ID: BAPS.2018.DPP.CP11.55
Abstract: CP11.00055 : Rogue waves detection in ion acoustic turbulence inside a new toroidal plasma device
Thiery Luc Pierre
Thiery Luc Pierre
The appearance of rogue waves in turbulence has recently attracted much interest in neutral and conducting fluids. This is of major importance in nonlinear dynamics research. We propose to detect very large amplitude solitary waves in ion acoustic turbulence excited in an ion-beam plasma system. Numerical studies have been performed recently by several authors in the case of rogue waves in dusty plasmas (1,2). Our experiment is conducted in a new toroidal unmagnetized plasma device (rr= 40 cm, R=60 cm). The plasma is created by thermionic emission using hot tungsten filaments. The ionizing electrons are confined inside the torus by a multipolar magnetic structure (3) arranged in a “checkerboard” configuration of permanent magnets glued on the external wall of the toroidal vessel. Grids inserted in the plasma create the counter-propagating ion beams exciting the turbulence when the relative velocity of the ions is larger than the ion acoustic velocity. The detection of rare large events is performed in real-time using a digital storage oscilloscope. Preliminary results are presented.
1- N. Kaur et al., Plasma Sci. & Technology, 20, 074009, 2018.
2- K. He et al., Physics Letters A, 378, 2137, 2014.
3- K. N. Leung, N. Hershkowitz, K. R. MacKenzie, Phys. Fluids, 19, 1045, 1976.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.CP11.55
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