Simulations of Alfvénic modes in TJ-II Stellarator
Document typeConference report
PublisherBarcelona Supercomputing Center
Rights accessOpen Access
Alfvénic modes are one of the subclass of instabilities prevalent in burning plasmas due to interaction of energetic particles with background plasma. In this paper we investigate the properties of these modes with 3D simulations using modeling tools STELLGAP  and AE3D  of Neutral Beam Injection (NBI) heated H-plasmas in TJ-II low-magnetic-shear flexible heliac (B0 = 0.95 T, <R> = 1.5 m, <a> = 0.22 m). These simulations focus on modelling the experimental observations  for prominent modes in TJ-II plasmas. Our simulations show consistency in frequency and radial location with the measured Alfvén Eigenmodes . These simulations are performed for chirping and steady modes in TJ-II discharge # 29839 at t = 1150 and 1160ms respectively.
CitationRakha, A. [et al.]. Simulations of Alfvénic modes in TJ-II Stellarator. A: BSC Severo Ochoa International Doctoral Symposium (4th: 2017: Barcelona). "Book of abstracts". Barcelona: Barcelona Supercomputing Center, 2017, p. 103-105.