6 papers
Role of Magnetic Field in the Redistribution of Turbulence from Large-Scale Structures to Small-Scale Fluctuations
Tanmay Karmakar, Rosh Roy, Lavkesh Lachhvani +5
Magnetized plasmas with equilibrium density gradients support drift-wave turbulence, which is often regulated by self-generated zonal flows. In this work, we experimentally examine…
Transition from Zonal Flows to Streamer like structures and associated edge Fluctuations
Tanmay Karmakar, Rosh Roy, Lavkesh Lachhvani +5
We report experimental observations of a controlled transition from a zonal-flow (ZF) dominated regime to a coexistence regime of ZFs and streamers, and finally to a streamer-domin…
Experimental observation of drift acoustic cnoidal waves in a magnetized plasma
Tanmay Karmakar, Rosh Roy, Lavkesh Lachhvani +5
We report the experimental observation of highly nonlinear coherent structures in a linear magnettized plasma characterized by a strong background density gradient and significant…
Nonlinear Energy Transfer Analysis between Coherent Modes in Developing Plasma Turbulence
Sandip Das, Lavkesh Lachhvani, Kunal Singha +4
Energy transfer among various spectral components of fluctuating physical parameters in plasma occurs due to the nonlinear interactions, but these effects are typically not capture…
MHD activity induced coherent mode excitation in the edge plasma region of ADITYA-U Tokamak
Kaushlender Singh, Suman Dolui, Bharat Hegde +28
In this paper, we report the excitation of coherent density and potential fluctuations induced by magnetohydrodynamic (MHD) activity in the edge plasma region of ADITYA-U Tokamak.…
Unprecedented confinement time of electron plasmas with a purely toroidal magnetic field in SMARTEX-C
Lavkesh Lachhvani, Sambaran Pahari, Rajiv Goswami +2
Confinement time of electron plasmas trapped using a purely toroidal magnetic field has been extended to s in a small aspect ratio (, and $a…