Scientific Commons: A. Bondeson

Progress in the area of MHD stability and disruptions, since the publication of the 1999 ITER Physics Basis document (1999 Nucl. Fusion 39 2137-2664), is reviewed. Recent theoretical and experimental...

Resistive Wall Mode Studies in JET (2005)

Hender,T. C., Gryaznevich,M., Liu,Y. Q., Bigi,M., Buttery,R. J., Bondeson,A., ...

Resistive Wall Mode Studies in JET (2005)

Hender, T. C., Gryaznevich, M., Liu, Y. Q., Bigi, M., Buttery, R. J., Bondeson, A., ...

Feedback and rotational stabilization of resistive wall modes in ITER (2005)

Liu, Y. Q., Bondeson, A., Chu, M. S., Favez, J. Y., Gribov, Y., Gryaznevich, M., ...

Different models have been introduced in the stability code MARS-F in order to study the damping effect on resistive wall modes (RWM) in rotating plasmas. Benchmarks of MARS-F calculations with RWM...

Modeling of Resistive Wall Mode Experiments in JET (2004)

Liu,Y. Q., Hender,T. C., Gryaznevich,M., Howell,D. F., Pinches,S. D., Buttery,R. J., ...

Modeling of Resistive Wall Mode Experiments in JET (2004)

Liu, Y. Q., Hender, T. C., Gryaznevich, M., Howell, D. F., Pinches, S. D., Buttery, R. J., ...

Overview of JET results (2003)

Pamela, J., Solano, E. R., Adams, J. M., Agarici, G., Agarici, M., Akhter, H., ...

Scientific and technical activities on JET focus on the issues likely to affect the ITER design and operation. Our understanding of the ITER reference mode of operation, the ELMy H-mode, has...

Eddy Current Computations Using Adaptive Grids And Edge Elements (2001)

Y. Q. Liu, Y. Q. Liu, A. Bondeson, A. Bondeson, R. Bergstr Om, R. Bergstr Om, ...

Results are presented from eddy current computations using adaptive techniques, based on rigorous a posteriori error estimates. The adaptivity restores the quadratic convergence with grid size of the...

Quasioptical Gyroklystron. (1998)

Manheimer,W. M., Ott,E., Bondeson,A.

A quasioptical gyroklystron for generating high power quasioptical (millimeter) radiation. A mildly relativistic electron beam gyrating in a static magnetic field is passed through a first open...

Beta limits in long-pulse tokamak discharges (1997)

Sauter, O., LaHaye, R.J., Chang, Z., Gates, D.A., Kamada, Y., Zohm, H., ...

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying...

Beta limits in long-pulse tokamak discharges (1997)

Sauter, O., LaHaye, R. J., Chang, Z., Gates, D. A., Kamada, Y., Zohm, H., ...

The maximum normalized beta achieved in long-pulse tokamak discharges at low collisionality falls significantly below both that observed in short pulse discharges and that predicted by the ideal MHD...

Resistive stability of tokamaks with negative central shear (1996)

Bondeson, A., M.S., Chu, Greene, J.M., L.L., Lao, Miller, R.L., Sauter, O., ...

Nonlinear stability studies of coupled tearing modes in toroidal finite-beta plasmas using PEST-3 (1996)

M.S., Chu, Greene, J.M., L.L., Lao, Miller, R.L., Bondeson, A., Pletzer, A., ...

MHD stability study for the ITER reference case (1996)

Sauter, O., Boucher, D., Porcelli, F., Rosenbluth, M., M.S., Chu, Lütjens, H., ...

The CHEASE code for toroidal MHD equilibria (1996)

Lutjens, H., Bondeson, A., Sauter, O.

The CHEASE code (Cubic Hermite Element Axisymmetric Static Equilibrium) solves the Grad-Shafranov equation for toroidal MHD equilibria using a Hermite bicubic finite element discretization with...

Resistive interchange modes in negative central shear tokamaks with peaked pressure profiles (1996)

Chu, M. S., Greene, J. M., Lao, L. L., Miller, R. L., Bondeson, A., Sauter, O., ...

Resistive interchange modes can be driven unstable by large pressure gradients in the negative central magnetic shear (NCS) region of advanced tokamaks. Localized stability analysis reveals that the...

The CHEASE code for toroidal MHD equilibria (1996)

Lütjens, H., Bondeson, A., Sauter, O.

Stabilization of global MHD instabilities by toroidal plasma rotation (1995)

M.S., Chu, Greene, J.M., Miller, R.L., Bondeson, A., Lütjens, H., De.Ridder, G., ...

Wall stabilization of ideal modes in tokamaks (1995)

D.J., Ward, Bondeson, A.

Stabilization of Ideal Modes by Resistive Walls in Tokamaks with Plasma Rotation and Its Effect on the Beta-Limit (1995)

Ward, D. J., Bondeson, A.

Stabilization of pressure-driven external modes in tokamaks with a resistive wall and toroidal rotation (1994)

D.J., Ward, Bondeson, A.

Linear-Stability of Resistive Mhd Modes - Axisymmetrical Toroidal Computation of the Outer Region Matching Data (1994)

Pletzer, A., Bondeson, A.

The quest to determine accurately the stability of tearing and resistive interchange modes in two-dimensional toroidal geometry led to the development of the PEST-3 code, which is based on solving...

Stabilization of External-Modes in Tokamaks by Resistive Walls and Plasma Rotation (1994)

Bondeson, A., Ward, D. J.

It is shown that low n, pressure-driven, external modes in tokamaks can be fully stabilized by resistive walls when the plasma rotates at some fraction of the sound speed. The stabilization depends...

Papers presented at the 15th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Seville, Spain, September 26 - October 1, 1994 (1994)

Lister, J.B., Ward, D.J., Bondeson, A., Fasoli, A.

Stabilization of ideal modes by resistive walls in tokamaks with plasma rotation and its effect on the beta limit (1994)

Ward, D.J., Bondeson, A.

Influence of trapped thermal particles on global n=1 modes in high temperature tokamak plasmas (1993)

Antonsen, T.M., Bondeson, A.

MHD stability at high beta poloidal and high qo (1993)

Bondeson, A.

Computation of resistive instabilities in toroidal plasmas (1993)

Bondeson, A., Vlad, G., Lütjens, H.

Beta limits for tokamaks with a large bootstrap fraction (1993)

Bondeson, A.

Ideal MHD analysis of advanced regime tokamaks (1993)

Manickam, J., Bondeson, A.

Alfvén gap modes in elongated plasmas (1993)

Villard, L., Vaclavik, J., Brunner, S., Lütjens, H., Bondeson, A.

Pressure and inductance effects on vertical stability of shaped tokamaks (1993)

D.J., Ward, Bondeson, A., Hofmann, F.

Stabilisation of external kink modes in tokamaks (1993)

Ward, D., Bondeson, A.

Pressure and inductance effects on vertical stability of shaped tokamaks (1993)

D.J., Ward, Bondeson, A., Hofmann, F.

Pressure and Inductance Effects on the Vertical Stability of Shaped Tokamaks (1993)

Ward, D. J., Bondeson, A., Hofmann, F.

Numerical calculations are presented to show the influence of pressure and inductance on the vertical stability of shaped tokamaks. High values of epsilon beta(p) improve the vertical stability of...

Electron-Cyclotron Resonance Heating on the Tca Tokamak (1993)

Pietrzyk, Z. A., Pochelon, A., Behn, R., Bondeson, A., Dutch, M., Goodman, T. P., ...

Electron cyclotron resonance heating (ECRH) experiments at 39 GHz with power levels similar to those of Ohmic heating have been conducted in the TCA tokamak, in either the X-mode or the O-mode. ECRH...

Numerical Study of the Axisymmetrical Ideal Mhd Stability of Extrap (1993)

Benda, M., Bondeson, A.

A numerical study of the free-boundary axisymmetric (n = 0) ideal magnetohydrodynamical (MHD) motions of the EXTRAP device is presented. The dependence of stability on current profiles in the plasma...

Studies of Self-Consistent-Field Structure in a Quasi-Optical Gyrotron (1993)

Antonsen, T. M., Bondeson, A., Roulin, M., Tran, M. Q.

The presence of an electron beam in a quasioptical gyrotron cavity alters the structure of the fields from that of the empty cavity. A computer code has been written that calculates this alteration...

Effects of Trapped Thermal Particles on the N=1 Internal Kink Mode in Tokamaks (1993)

Antonsen, T. M., Bondeson, A.

The effects of thermal trapped particles on the internal kink mode are studied using drift kinetic theory. For equal electron and ion temperatures, the trapped particles increase the marginal...

Influence of Trapped Thermal Particles on Internal Kink Modes in High-Temperature Tokamaks (1993)

Antonsen, T. M., Bondeson, A.

The effects of thermal trapped particles on the n = 1 internal kink mode are studied using drift kinetic theory. Strong modifications of the magnetohydrodynamic (MHD) results are found, and marginal...

Influence of trapped thermal particles on internal kink modes in high temperature tokamaks (1993)

Antonsen, T.M., Bondeson, A.

Studies of self-consistent field structure in a quasi-optical gyrotron (1993)

Antonsen, T.M., Bondeson, A., Roulin, M., Tran, M.Q.

Stabilization of external modes in tokamaks by resistive walls and plasma rotation (1993)

Bondeson, A., Ward, D.J.

Linear stability of resistive MHD modes: Axisymmetric toroidal computation of the outer region matching data (1993)

Pletzer, A., Bondeson, A., Dewar, R.L.

Studies of the self-consistent field structure in a quasi-optical gyrotron (1992)

Antonsen, T.M., Bondeson, A., Roulin, M., M.Q., Tran

Ideal and resistive MHD stability of internal kink modes in circular and shaped tokamaks (1992)

Bondeson, A., Vlad, G., Lütjens, H.

Computation of resistive instabilities in toroidal plasmas (1992)

Bondeson, A., Vlad, G., Lütjens, H.

Ideal-MHD operational limits for highly elongated tokamaks (1992)

Eriksson, G., Bondeson, A., D.J., Ward, Hofmann, F., Villard, L.

Electron cyclotron resonance heating on the TCA tokamak (1992)

Pietrzyk, Z.A., Pochelon, A., Behn, R., Bondeson, A., Dutch, M., Goodman, T.P., ...

Beta limit of a completely bootstrapped tokamak (1992)

Weening, R.H., Bondeson, A.

Density Limits and Disruptions in the Tca Tokamak (1992)

Pietrzyk, Z. A., Pochelon, A., Behn, R., Bondeson, A., Duperrex, P. A., Duval, B. P., ...

Density limit disruptions have been studied during the current flat-top of TCA. Disruption occurs at two different densities, depending on discharge programming. The highest densities are achieved by...

Ideal Mhd Stability of Internal Kinks in Circular and Shaped Tokamaks (1992)

Lutjens, H., Bondeson, A., Vlad, G.

Stability limits for the internal kink mode are calculated for tokamaks with different current profiles and plasma cross-sections using ideal magnetohydrodynamics (MHD). The maximum stable poloidal...

Axisymmetrical Mhd Equilibrium Solver with Bicubic Hermite Elements (1992)

Lutjens, H., Bondeson, A., Roy, A.

A numerical code using Hermite bicubic finite elements has been developed for the computation of axisymmetric magnetohydrodynamic (MHD) equilibria. The code provides a mapping to flux coordinates for...

Resistive Toroidal Stability of Internal Kink Modes in Circular and Shaped Tokamaks (1992)

Bondeson, A., Vlad, G., Lutjens, H.

The linear resistive magnetohydrodynamical stability of the n = 1 internal kink mode in tokamaks is studied numerically. The stabilizing influence of small aspect ratio [Holmes et al., Phys. Fluids B...

Stability of the N = 1 Ideal Internal Kink for Large Aspect Ratio Shafranov Equilibria (1992)

Bondeson, A., Bussac, M. N.

Stability limits for the ideal internal kink mode are calculated analytically for the Shafranov current profile using the large aspect ratio expansion. For equilibria with q(a) > 2 and circular...

Electron cyclotron resonance heating on the TCA Tokamak (1992)

Pietrzyk, Z.A., Pochelon, A., Behn, R., Bondeson, A., Dutch, M., Goodman, T.P., ...

Pressure and inductance effects on vertical stability of shaped tokamaks (1992)

Ward, D.J., Bondeson, A., Hofmann, F.

Beta limit of a completely bootstrapped tokamak (1992)

Weening, R.H., Bondeson, A.

Simulation of MHD activity during density limit disruptions in tokamaks (1991)

Bondeson, A., Parker, R., Hugon, M.

Density limit studies in the TCA Tokamak (1991)

Pietrzyk, Z.A., Behn, R., Bondeson, A., Duval, B., Joye, B., ...

Influence of triangularity and pressure profiles on ideal-MHD beta limits (1991)

Schultz, G., Bondeson, A., Troyon, F., Roy, A.

Free boundary toroidal stability of ideal and resistive internal kinks (1991)

Vlad, G., Lütjens, H., Bondeson, A.

Tokamak disruptions and modelling of complex nonlinear plasma evolution by supercomputers (1991)

Parker, R.D., Bondeson, A.

Ideal Toroidal Stability Beta Limits and Shaping Effects for Reversed Field Pinch Configurations (1991)

Paccagnella, R., Bondeson, A., Lutjens, H.

The influence of shaping and toroidicity on the ideal MHD stability of the reversed field pinch (RFP) is investigated with respect to current driven and pressure driven modes. It is found that...

Mhd Modeling of Density Limit Disruptions in Tokamaks (1991)

Bondeson, A., Parker, R. D., Hugon, M., Smeulders, P.

The magnetohydrodynamic (MHD) activity during density limit disruptions in tokamaks is modelled numerically by three-dimensional resistive reduced MHD simulations with a simple transport model...

Tunable Integration Scheme for the Finite-Element Method (1991)

Bondeson, A., Fu, G. Y.

A discretization method is proposed where a tunable integration scheme is applied to the finite element method (FEM). The method is characterized by one continuous parameter, p. A theoretical error...

Stability of the n = 1 ideal internal kink for large aspect ratio Shafranov equilibria (1991)

Bondeson, A., Bussac, M.N.

Ideal toroidal stability b-limits and shaping effects for reversed field pinch configurations (1991)

Bondeson, A., Lütjens, H., Paccagnella, R.

Ideal MHD stability of internal kinks in circular and shaped tokamaks (1991)

Bondeson, A., Vlad, G., Lütjens, H.

Resistive toroidal stability of internal kink modes in circular and shaped tokamaks (1991)

Bondeson, A., Vlad, G., Lütjens, H.

Density limit disruption studies in the TCA tokamak (1991)

Pietrzyk, Z.A., Pochelon, A., Behn, R., Bondeson, A., Duval, B.P., ...

Global, resistive stability analysis in axisymmetric systems (1990)

Bondeson, A., Vlad, G., Lütjens, H.