69 citations · 219 across the 9 of their papers we have counts for
9 papers
Mesoscopic transport in KSTAR plasmas: avalanches and the staircase
Minjun J. Choi, Jae-Min Kwon, Lei Qi +18
The self-organization is one of the most interesting phenomena in the non-equilibrium complex system, generating ordered structures of different sizes and durations. In tokamak pla…
Stochastic fluctuation and transport of tokamak edge plasmas with the resonant magnetic perturbation field
Minjun J. Choi, Jae-Min Kwon, Juhyung Kim +17
We present that a statistical method known as the Complexity-Entropy analysis is useful to characterize a state of plasma turbulence and flux in the resonant magnetic perturbation…
Effects of plasma turbulence on the nonlinear evolution of magnetic island in tokamak
Minjun J. Choi, Laszlo Bardoczi, Jae-Min Kwon +7
Magnetic islands (MIs), resulting from a magnetic field reconnection, are ubiquitous structures in magnetized plasmas. In tokamak plasmas, recent researches suggested that the inte…
Semi-analytic Shape Function of High-harmonic Electron Cyclotron Emission in Tenuous Plasma
J. Leem, J. Jo, G. S. Yun
Semi-analytic expressions for the electron cyclotron emission (ECE) shape function are developed for arbitrary high harmonics. The integrand of the harmonic ECE…
Experimental evidence of the non-diffusive avalanche-like electron heat transport events and their dynamical interaction with the shear flow structure
Minjun J. Choi, Hogun Jhang, J. -M. Kwon +12
We present experimental observations suggesting that the non-diffusive avalanche-like events are a prevalent and universal process of the electron turbulent heat transport in tokam…
Distinct stages of radio frequency emission at the onset of pedestal collapse in KSTAR H-mode plasmas
Minho Kim, Shekar G. Thatipamula, Jieun Lee +4
Using a high-speed and broadband radio frequency (RF) (0.1-1 GHz) spectrum analyzer developed on the KSTAR tokamak, it is found that several distinct stages of RF emission appear a…
The effect of time-varying flow-shear on the nonlinear stability of the boundary of magnetized toroidal plasmas
Youngmin Oh, Hyung Ju Hwang, Michael Leconte +1
We propose a phenomenological yet very general model in a form of generalized complex Ginzburg-Landau equation to understand the dynamics of the quasi-periodic fluid instabilities…
Mathematical analysis of long-time behavior of magnetized fluid instabilities with shear flow
Youngmin Oh, Gunsu S. Yun, Hyung Ju Hwang
We study a complex Ginzburg-Landau (GL) type model related to fluid instabilities in the boundary of magnetized toroidal plasmas (called edge-localized modes) with a prescribed she…
Dynamic and Stagnating Plasma Flow Leading to Magnetic Flux Tube Collimation
Setthivoine You, Paul M. Bellan, Gunsu Yun
Highly collimated, plasma-filled magnetic flux tubes are frequently observed on galactic, stellar and laboratory scales. We propose that a single, universal magnetohydrodynamic pum…