Abstract
Edge fluctuation data from both COMPASS-D and calculations with the large-eddy simulation code CUTIE have been analysed with a number of techniques, revealing coherent structures which exhibit high-frequency, standing-wave oscillations; some of those observed during edge localized modes (ELMs) have an `inverse-chirp' character and these are related to a disturbance of the plasma boundary in the lower-inboard quadrant of the poloidal plane. A `precursor' mode, seen in Ohmic discharges at about 220 kHz just before large ELMs, appears to be outward ballooning in character. Although the CUTIE calculations do not yet include ELM simulations, the results seem to correspond qualitatively with those seen between ELMs or during ELM-free periods on COMPASS-D.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
