23 citations · 86 across the 9 of their papers we have counts for
11 papers
A feasibility study for a Doppler Reflectometer System in the JT-60SA tokamak
D. Carralero, T. Happel, T. Estrada +5
In this work we present a study on the viability and practicality of installing a Doppler reflectometer (DR) system in the JT-60SA advanced tokamak. First, we discuss its scientifi…
Characterization of NBI-driven shear Alfvén waves in the TJ-II stellarator using Mirnov probes and electrostatic potential fluctuation measurements
P. Pons-Villalonga, Á. Cappa, E. Ascasíbar +6
We present the first experimental measurements of the toroidal mode number of shear Alfvén waves in the TJ-II stellarator. A series of experiments were carried out in three differe…
Analysis of the ECH effect on the EPM/AEs stability in Heliotron J plasma using a Landau closure model
J. Varela, K. Nagasaki, S. Kobayashi +9
The aim of the present study is to analyze the effect of the electron cyclotron heating (ECH) on the linear stability of Alfven Eigenmodes (AE) and energetic particle modes (EPM) t…
Validating neutral-beam current drive simulations in the TJ-II stellarator
Sadig Mulas, Álvaro Cappa, José Martínez-Fernández +9
In this paper, we analyze the results of neutral-beam current drive (NBCD) experiments, performed in the TJ-II stellarator, with the aim of validating the theoretical predictions.…
On the interaction between the island divertor heat fluxes, the scrape-off layer radial electric field and the edge turbulence in Wendelstein 7-X plasmas
E. Maragkoudakis, D. Carralero, T. Estrada +11
The formation of the radial electric field, in the SOL has been experimentally studied for attached divertor conditions in stellarator W7-X. The main objective of this…
A model for the fast evaluation of prompt losses of energetic ions in stellarators
J. L. Velasco, I. Calvo, S. Mulas +4
A good understanding of the confinement of energetic ions in non-axisymmetric magnetic fields is key for the design of reactors based on the stellarator concept. In this work, we d…
Automatic Identification of MHD Modes in Magnetic Fluctuations Spectrograms using Deep Learning Techniques
A. Bustos, E. Ascasibar, A. Cappa +1
The control and mitigation of MHD oscillations modes is an open problem in fusion science because they can contribute to the outward particle/energy flux and can drive the device a…
Modeling of the ECCD injection effect on the Heliotron J and LHD plasma stability
J. Varela, K. Nagasaki, K. Nagaoka +6
The aim of the study is to analyze the stability of the Energetic Particle Modes (EPM) and Alfven Eigenmodes (AE) in Helitron J and LHD plasma if the electron cyclotron current dri…
Effect of the tangential NBI current drive on the stability of pressure and energetic particle driven MHD modes in LHD plasma
J. Varela, W. A. Cooper, K. Nagaoka +5
The aim of the present study is to analyze the stability of the pressure gradient driven modes (PM) and Alfven eigenmodes (AE) in the Large Helical Device (LHD) plasma if the rotat…
Electron Bernstein waves emission in the TJ-II Stellarator
J. M. García-Regaña, Á. Cappa, F. Castejón +5
Taking advantage of the electron Bernstein waves heating (EBWH) system of the TJ-II stellarator, an electron Bernstein emission (EBE) diagnostic was installed. Its purpose is to in…
The level of non-thermal velocity fluctuations deduced from Doppler spectroscopy and its role on TJ-II confinement
B. Zurro, A. Baciero
The goal of this investigation is to study, in the line of previous works, the level of velocity fluctuations in different scenarios of the TJ-II stellarator. The method followed c…