Results 21 to 30 of about 161,882 (329)

Fast-ion velocity-space tomography using slowing-down regularization in EAST plasmas with co- and counter-current neutral beam injection

Plasma Physics and Controlled Fusion, 2020
We demonstrate 2D reconstructions of the fast-ion velocity distribution from two-view fast-ion D-alpha (FIDA) measurements at the EAST tokamak. By expressing the distribution in a basis relying on the fast-ion slowing-down process in fusion plasmas, the ...
B. Madsen, Juan Huang, M. Salewski, H. Järleblad, Per Christian Hansen, Luke Stagner, J. Su, J. F. Chang, J. Fu, Jinfang Wang, L. Liang, G. Zhong, Yingying Li, Bo Lyu, Haiqing Liu, Qing Zang, Zheng-ping Luo, M. Nocente, D. Moseev, Tieshuan Fan, Yimo Zhang, Danke Yang, Jiaqi Sun, L. Liao   +23 more
semanticscholar   +1 more source

Requirements and modelling of fast particle injection in RFX-mod tokamak plasmas [PDF]

, 2017
The planned upgrade of the RFX-mod device is a good opportunity to widen the operational space of the machine, in both RFP and tokamak configurations. Installation of a power neutral beam injector is also envisaged and a NB system compatible with RFX-mod,
Artaud, Jean Francois, Bolzonella, Tommaso, Sakakita, Hajime, Valisa, Marco, Vallar, Matteo, Vincenzi, Pietro   +5 more
core   +1 more source

Transport Simulasion in a Burning Tokamak Plasma [PDF]

, 1992
A one-dimensional tokamak transport code (TASK/TR) has been developed to analyze the evolution of a burning plasma accompanied with fusion reaction. This code deals with the electrons, deuterons, tritons, thermalized α particles, fast α particles and ...
Fukuyama, Atsushi, Furutani, Yoichiro, Kasai, Takashi   +2 more
core   +1 more source

Observation of Alfvén Eigenmodes driven by off-axis neutral beam injection in the TCV tokamak

Plasma Physics and Controlled Fusion, 2020
Fast-particle driven Alfvén Eigenmodes have been observed in low-collisionality discharges with off-axis neutral beam injection (NBI), electron cyclotron resonance heating (ECRH) and a reduced toroidal magnetic field.
B. Geiger, A. Karpushov, P. Lauber, S. Sharapov, M. Dreval, F. Bagnato, M. Baquero-Ruiz, A. Dal Molin, B. Duval, M. Garcia-Muñoz, C. Marini, M. Nocente, O. Sauter, L. Stipani, D. Testa, M. Vallar   +15 more
semanticscholar   +1 more source

Observations of Reduced Electron Gyroscale Fluctuations in National Spherical Torus Experiment H-Mode Plasmas with Large E X B Flow Shear [PDF]

, 2019
Electron gyroscale fluctuation measurements in National Spherical Torus Experiment H-mode plasmas with large toroidal rotation reveal fluctuations consistent with electron temperature gradient (ETG) turbulence.
Bell, RE, Domier, CW, Kaye, SM, LeBlanc, BP, Lee, W, Levinton, FM, Mazzucato, E, Menard, JE, N. C. Luhmann, Jr., Park, HK, Smith, DR, Yuh, H   +11 more
core   +1 more source

Analysis of equivalent impedance characteristics of a high power RF ion source driver

He jishu, 2021
BackgroundThe ion source is one of the key components of the neutral beam injection system. Radio frequency (RF) ion source has the advantages of long life time, easy maintenance and long pules operation, which make it the main alternative source for the
YANG Puqiong, LIU Bo, JIANG Caichao, WEI Jianglong, XIE Yahong, XIE Yuanlai, PAN Junjun, HU Chundong   +7 more
doaj   +1 more source

TPX Neutral Beam injection system design [PDF]

15th IEEE/NPSS Symposium. Fusion Engineering, 2002
The existing Tokamak Fusion Test Reactor (TFTR) Neutral Beam system is proposed to be modified for long pulse operation on the Tokamak Physics Experiment (TPX). Day one operation of TPX will call for one TFTR beamline modified for 1000 second pulse lengths oriented co-directional to the plasma current. The system design will be capable of accommodating
A. von Halle, O.N. Bowen, J.W. Edwards, L.R. Grisham, R. Newman, T. O'Connor, S. Ramakrishnan, G. Rossi, T. Stevenson, K.E. Wright   +9 more
openaire   +1 more source

Edge momentum transport by neutrals: an interpretive numerical framework [PDF]

, 2017
Due to their high cross-field mobility, neutrals can contribute to momentum transport even at the low relative densities found inside the separatrix and they can generate intrinsic rotation.
E. Viezzer, I. Pusztai, J.T. Omotani, null null, S.L. Newton, T. Fülöp   +5 more
core   +1 more source

Thermodynamic simulation and structural optimization of the collimator in the drift duct of EAST-NBI

Nuclear Engineering and Technology, 2022
The collimator is one of the high-heat-flux components used to avoid a series of vacuum and thermal problems. In this paper, the heat load distribution throughout the collimator is first calculated through experimental data, and a transient thermodynamic
Ning Tang, Chun-dong Hu, Yuan-lai Xie, Jiang-long Wei, Zhi-Wei Cui, Jun-Wei Xie, Zhuo Pan, Yao Jiang   +7 more
doaj   +1 more source

Turbulent transport of impurities and their effect on energy confinement [PDF]

, 2012
By presenting linear and nonlinear gyrokinetic studies, based on a balanced neutral beam injection deuterium discharge from the DIII-D tokamak, we demonstrate that impurities alter the scaling of the transport on the charge and mass of the main species ...
Candy, J., Fulop, T., Mollen, A., Pusztai, I.   +3 more
core   +2 more sources