Abstract
Different types of m/n=1/1 mode during the central relaxation oscillations are observed in lower hybrid current drive (LHCD) plasma on the HT-7 tokamak. In this Letter, the difference of the mid-mode and the precursor on the sawtooth oscillation are reported using two-dimensional tomography of soft X-ray signal. It is shown that the growth rate of magnetic island of the mid-oscillation is smaller than that of the precursor oscillation, and the hot core in the mid-oscillation case does not move outward to the vicinity of the q=1 surface. However, in the precursor oscillation case, the colder plasma develops a magnetic island on the former magnetic axis after the hot core expulsion, from the contour map of the soft X-ray emissivity.
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.
