Schedule Logo

Poster Session I

4:30 pm – 6:30 pm, Tuesday October 14 Session DT4 COEX, Lobby E
Topics:
PrevNext

Experimental Confirmation of Kolmogorov-Type Turbulent Scaling in a High-β Magnetically Screened Plasma

Poster 17
Presenter: Ayan Adhikari (Institute for Plasma Research)
Authors: Amulya Sanyasi (Institute for Plasma Research), Devendra Sharma (Institute for Plasma Research), Pankaj Srivastava (Institute for Plasma Research), Lalit Awasthi (Institute for Plasma Research), Mainak Bandyopadhyay (ITER-India, Institute for Plasma Research, HBNI, Gandhinagar, India.)

We report the experimental confirmation of Kolmogorov-like turbulent scaling in a magnetically screened high-β plasma generated in the Large Volume Plasma Device - Upgrade (LVPD-U). The experiment employs a filament-driven DC discharge in argon gas with a transverse magnetic field (20 ≤ BEEF ≤ 200 G) imposed via an Electron Energy Filter (EEF). Fluctuating plasma parameters—namely ion saturation current (Isat) and floating potential (Vf ) and magnetic fluctuations are measured using radially positioned Langmuir probes and B-dot probes at multiple locations in the downstream region. The acquired signals, sampled at 1 MS/s over a 50 ms window, are analyzed through power spectral density (PSD) estimation using smoothed FFT techniques. A clear inertial range emerges in both density and potential fluctuation spectra, exhibiting a spectral slope consistent with the Kolmogorov k −5/3 law for fluid-like turbulence. This result affirms the presence of a self-similar energy cascade even in low-temperature, magnetically structured plasmas and strengthens the universality of turbulence scaling across different plasma regimes. Future work will explore intermittency effects, scale-dependent anisotropy, and estimates of turbulent Reynolds numbers in such laboratory systems.

POSTERS (97)