Interpretation of the electron cyclotron emission signal from optically marginal plasmas

Autor:	Woochang Lee, Gunse S. Yun, Muhammad Khawar Ayub, Hyeon K. Park
Rok vydání:	2017
Předmět:	Physics Electron density Tokamak Flux tube Cyclotron General Physics and Astronomy Plasma Electron 01 natural sciences Instability 010305 fluids & plasmas law.invention Physics::Plasma Physics law 0103 physical sciences Electron temperature Atomic physics 010306 general physics
Zdroj:	Journal of the Korean Physical Society. 70:268-275
ISSN:	1976-8524 0374-4884
DOI:	10.3938/jkps.70.268
Popis:	The interpretation of electron cyclotron emission (ECE) signal from the optically marginal region of magnetized plasma is presented. The density and the temperature fluctuations associated with the edge localized modes (ELMs) observed in the KSTAR tokamak are estimated by assuming an ELM filamentary structure as a flux tube bulges out like a ballooning mode instability. Synthetic ECE signals from the rotating ELM are calculated based on the measured electron temperature profile and an assumed electron density profile constrained by the measured line-averaged density, yielding an ~ 0.02 relative fluctuation level in agreement with the experimental observations. The measured ECE signal is nearly in phase with the density modulation associated with the rotating ELM. This implies that the ECE signal corresponding to the ELM filaments has a significant contribution from the density fluctuations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::76570af52fe48273353b3028802e6a5c https://doi.org/10.3938/jkps.70.268 Zobrazit plný text záznamu Full text from SpringerLink