Publications

2006
Zheng L-J, Kotschenreuther M, Waelbroeck FL. Shielding of the error field by a liquid metal wall in tokamaks. Nuclear Fusion [Internet]. 2006;46 :L9. Publisher's VersionAbstract
It is shown that the error field in a tokamak can be shielded by a flowing liquid metal wall. In particular, a flowing liquid metal wall can prevent resonance amplification of the error field by the plasma near its no-wall stability limit.
Lazarus EA, Waelbroeck FL, Luce TC, Austin ME, Burrell KH, Ferron JR, Hyatt AW, Osborne TH, Chu MS, Brennan DP, et al. A comparison of sawtooth oscillations in bean and oval shaped plasmas. Plasma Physics and Controlled Fusion [Internet]. 2006;48 :L65. Publisher's VersionAbstract
The effect of plasma shape on sawtooth oscillations in the DIII-D tokamak plasmas is investigated by comparing discharges with cross-sections shaped like a bean and an oval. The two shapes are designed so that the Mercier instability threshold is reached when the axial safety factor is below unity for the bean and above unity for the oval cross-sections. This allows the role of interchange modes to be differentiated from that of the kink-tearing mode. The differences in the nature of the sawtooth oscillations in the bean and oval discharges are found to be determined primarily by extreme differences in the electron heat transport during the reheat. In both cases, the axial safety factor is found to be near unity following the crash.
Fitzpatrick R, Waelbroeck FL, Militello F. The influence of the ion polarization current on magnetic island stability in a tokamak plasma. Physics of Plasmas [Internet]. 2006;13 :-. Publisher's Version
2005
Xiang N, Waelbroeck FL. Collisional ion dynamics in capacitively coupled rf discharges. Journal of Vacuum Science & Technology A [Internet]. 2005;23. Publisher's Version
Waelbroeck FL. Natural Velocity of Magnetic Islands. Phys. Rev. Lett. [Internet]. 2005;95 :035002. Publisher's Version
Fitzpatrick R, Watson PG, Waelbroeck FL. Two-fluid magnetic island dynamics in slab geometry: Determination of the island phase velocity. Physics of Plasmas [Internet]. 2005;12 :-. Publisher's Version
Fitzpatrick R, Waelbroeck FL. Effect of drift-acoustic waves on magnetic island stability in slab geometry. Physics of Plasmas [Internet]. 2005;12 :-. Publisher's Version
Fitzpatrick R, Waelbroeck FL. Two-fluid magnetic island dynamics in slab geometry. II. Islands interacting with resistive walls or resonant magnetic perturbations. Physics of Plasmas [Internet]. 2005;12 :-. Publisher's Version
Fitzpatrick R, Waelbroeck FL. Two-fluid magnetic island dynamics in slab geometry. I. Isolated islands. Physics of Plasmas [Internet]. 2005;12 :-. Publisher's Version
2004
Xiang N. Effects of electron inertia in capacitively coupled radio frequency discharges. Physics of Plasmas [Internet]. 2004;11. Publisher's Version
Xiang N, Waelbroeck FL. Collisional sheath dynamics in the intermediate radio-frequency regime. Journal of Applied Physics [Internet]. 2004;95. Publisher's Version
Waelbroeck FL, Morrison PJ, Horton W. Hamiltonian formulation and coherent structures in electrostatic turbulence. Plasma Physics and Controlled Fusion [Internet]. 2004;46 :1331. Publisher's VersionAbstract
A Hamiltonian formulation is constructed for a finite ion Larmor radius fluid model describing ion temperature-gradient driven and drift Kelvin–Helmholtz modes. The Hamiltonian formulation reveals the existence of three invariants obeying detailed conservation properties, corresponding roughly to generalized potential vorticity, internal energy and ion momentum parallel to the magnetic field. These three invariants are added to the energy to form a variational principle that describes coherent structures (CSs), such as monopolar and dipolar vortices or modons. It is suggested that the invariants are responsible for the coherence and longevity of CSs and for their robustness during binary collisions.
2003
Xiang N, Waelbroeck FL. Effects of presheath dynamics on radio-frequency sheaths. Journal of Applied Physics [Internet]. 2003;93. Publisher's Version
La Haye RJ, Petty CC, Strait EJ, Waelbroeck FL, Wilson HR. Propagation of magnetic islands in the Er=0 frame of co-injected neutral beam driven discharges in the DIII-D tokamak. Physics of Plasmas [Internet]. 2003;10. Publisher's Version
Waelbroeck FL. Shielding of resonant magnetic perturbations in the long mean-free path regime. Physics of Plasmas [Internet]. 2003;10. Publisher's Version
2002
Waelbroeck FL. Analytic solution for low-frequency rf sheaths in pulsed discharges. Phys. Rev. E [Internet]. 2002;65 :066407. Publisher's Version
Chu MS, La Haye RJ, Austin ME, Lao LL, Lazarus EA, Pletzer A, Ren C, Strait EJ, Taylor TS, Waelbroeck FL. Study of a low β classical tearing mode in DIII-D. Physics of Plasmas [Internet]. 2002;9. Publisher's Version
2001
Connor JW, Waelbroeck FL, Wilson HR. The role of polarization current in magnetic island evolution. Physics of Plasmas [Internet]. 2001;8. Publisher's Version
Waelbroeck FL, Connor JW, Wilson HR. Finite Larmor-Radius Theory of Magnetic Island Evolution. Phys. Rev. Lett. [Internet]. 2001;87 :215003. Publisher's Version
2000
Fitzpatrick R, Waelbroeck FL. Nonlinear dynamics of feedback modulated magnetic islands in toroidal plasmas. Physics of Plasmas [Internet]. 2000;7. Publisher's Version

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