S. Günter

Details der Publikationsliste

Zeitraum

1999 - 2009

Anzahl

355

Co-Autoren

Overview of ASDEX Upgrade results-development of integrated operating scenarios for ITER (2005)

Günter,S., Angioni,C., Apostoliceanu,M., Atanasiu,C., Balden,M., Becker,G., ...

This article based on the 2004 Fusion Energy Conference contribution (Vilamoura, Portugal, 1-6 November 2004)

Overview of ASDEX Upgrade results-development of integrated operating scenarios for ITER (2005)

Günter, S., Angioni, C., Apostoliceanu, M., Atanasiu, C., Balden, M., Becker, G., ...

This article based on the 2004 Fusion Energy Conference contribution (Vilamoura, Portugal, 1-6 November 2004)

Numerical modeling of linear drift-tearing mode stability (2003)

Yu,Q., Günter,S., Scott,B. D.

Numerical modeling results of the linear drift tearing modes are presented. The present model is based on the two-fluids equations, and the perturbed bootstrap current is also included. The electron...

Neoclassical tearing modes on ASDEX Upgrade: improved scaling laws, high confinement at high βN and new stabilization experiments (2003)

Günter,S., Gantenbein,G., Gude,A., Igochine,V., Maraschek,M., Mück,A., ...

In this paper, recent results on the physics of neoclassical tearing modes (NTMs) achieved on ASDEX Upgrade are reported. A scaling law for NTM decay has been found, showing that the minimum local...

MHD stability analysis of type II ELMs in ASDEX Upgrade (2003)

Saarelma,S., Günter,S., Horton,L. D.

We investigated the differences between type I and type II edge localized modes (ELMs) in ASDEX Upgrade using the MHD stability analysis. When plasma conditions are changed from typical type I ELMy...

Performance-limiting MHD activity and possibilities for its stabilization in ASDEX Upgrade (2003)

Günter,S., Zohm,H.

Performance-limiting magnetohydrodynamic (MHD) instabilities on ASDEX Upgrade are discussed. In the conventional H-mode scenario, the main MHD performance limitation is found to be the neoclassical...

Internal transport barrier triggering by rational magnetic flux surfaces in tokamaks (2003)

Joffrin,E., Challis,C. D., Conway,G. D., Garbet,X., Gude,A., Günter,S., ...

The formation of internal transport barriers (ITBs) has been experimentally associated with the presence of rational q surfaces in both JET and ASDEX Upgrade. The triggering mechanisms are related to...

Monte Carlo δf simulation of the bootstrap current in the presence of a magnetic island (2003)

Poli,E., Peeters,A. G., Bergmann,A., Günter,S., Pinches,S. D.

In the theoretical description of the neoclassical tearing mode the bootstrap current is assumed to completely vanish inside the magnetic island if finite perpendicular transport can be neglected. In...

Tolerable ELMs in conventional and advanced scenarios at ASDEX Upgrade (2003)

Gruber,O., Günter,S., Herrmann,A., Horton,L. D., Lang,P. T., Maraschek,M., ...

Recent ASDEX Upgrade experiments integrated benign type II ELMs (tolerable peak heat loads on target plates) with high performance. In both conventional and advanced H-modes, the operation window...

Neoclassical tearing modes on AUG: improved scaling laws, high confinement at high βN and new stabilization experiments (2003)

Günter,S., Gantenbein,G., Gude,A., Igochine,V., Maraschek,M., Sauter,O., ...

The accuracy of the scaling laws derived so far for the normalised beta values at the onset of neoclassical tearing modes is limited as the results depend on the presence and magnitude of seed...

Investigation of complex MHD activity by a combined use of various diagnostics (2003)

Igochine,V., Günter,S., Maraschek,M.

A new combined method for investigation of magnetohydrodynamic (MHD) activity in fusion experiments is proposed. The main advantages of this approach are the possibility of a direct comparison of...

Sawtooth, neo-classical tearing mode and error field studies in JET (2003)

Hender,T. C., Sauter,O., Alper,B., Angioni,C., De Baar,M. R., De Benedetti,M., ...

A range of ITER relevant plasma stability issues has been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawtooth seeds, scaling of m=2, n=1...

Overview of ASDEX Upgrade results (2003)

Zohm,H., Angioni,C., Arslanbekov,R., Atanasiu,C., Becker,G., Becker,W., ...

Recent results from the ASDEX Upgrade experimental campaigns 2001 and 2002 are presented. An improved understanding of energy and particle transport emerges in terms of a 'critical gradient' model...

Analytical solutions to the Grad-Shafranov equation for diverted plasmas (2003)

Atanasiu,C. V., Günter,S., Lackner,K., Miron,I. G.

Two families of exact analytical solutions of the Grad-Shafranov equation are presented by specifying the highest polynomial dependence of the plasma current density on the flux function in such a...

Type-I ELM mode structure observed by divertor thermography in ASDEX Upgrade (2003)

Eich,T., Herrmann,A., Neuhauser,J., Günter,S.

In the ASDEX Upgrade tokamak, power deposition structures on the outer divertor target surfaces during type-I Edge Localised Modes (ELMs) have been discovered by infra red thermography. These...

Numerical modeling of linear drift-tearing mode stability (2003)

Yu, Q., Günter, S., Scott, B. D.

Numerical modeling results of the linear drift tearing modes are presented. The present model is based on the two-fluids equations, and the perturbed bootstrap current is also included. The electron...

Neoclassical tearing modes on ASDEX Upgrade: improved scaling laws, high confinement at high βN and new stabilization experiments (2003)

Günter, S., Gantenbein, G., Gude, A., Igochine, V., Maraschek, M., Mück, A., ...

In this paper, recent results on the physics of neoclassical tearing modes (NTMs) achieved on ASDEX Upgrade are reported. A scaling law for NTM decay has been found, showing that the minimum local...

MHD stability analysis of type II ELMs in ASDEX Upgrade (2003)

Saarelma, S., Günter, S., Horton, L. D., ASDEX Upgrade Team

We investigated the differences between type I and type II edge localized modes (ELMs) in ASDEX Upgrade using the MHD stability analysis. When plasma conditions are changed from typical type I ELMy...

Performance-limiting MHD activity and possibilities for its stabilization in ASDEX Upgrade (2003)

Günter, S., Zohm, H.

Performance-limiting magnetohydrodynamic (MHD) instabilities on ASDEX Upgrade are discussed. In the conventional H-mode scenario, the main MHD performance limitation is found to be the neoclassical...

Internal transport barrier triggering by rational magnetic flux surfaces in tokamaks (2003)

Joffrin, E., Challis, C. D., Conway, G. D., Garbet, X., Gude, A., Günter, S., ...

The formation of internal transport barriers (ITBs) has been experimentally associated with the presence of rational q surfaces in both JET and ASDEX Upgrade. The triggering mechanisms are related to...

Monte Carlo δf simulation of the bootstrap current in the presence of a magnetic island (2003)

Poli, E., Peeters, A. G., Bergmann, A., Günter, S., Pinches, S. D.

In the theoretical description of the neoclassical tearing mode the bootstrap current is assumed to completely vanish inside the magnetic island if finite perpendicular transport can be neglected. In...

Tolerable ELMs in conventional and advanced scenarios at ASDEX Upgrade (2003)

Gruber, O., Günter, S., Herrmann, A., Horton, L. D., Lang, P. T., Maraschek, M., ...

Recent ASDEX Upgrade experiments integrated benign type II ELMs (tolerable peak heat loads on target plates) with high performance. In both conventional and advanced H-modes, the operation window...

Neoclassical tearing modes on AUG: improved scaling laws, high confinement at high βN and new stabilization experiments (2003)

Günter, S., Gantenbein, G., Gude, A., Igochine, V., Maraschek, M., Sauter, O., ...

The accuracy of the scaling laws derived so far for the normalised beta values at the onset of neoclassical tearing modes is limited as the results depend on the presence and magnitude of seed...

Investigation of complex MHD activity by a combined use of various diagnostics (2003)

Igochine, V., Günter, S., Maraschek, M., ASDEX Upgrade Team

A new combined method for investigation of magnetohydrodynamic (MHD) activity in fusion experiments is proposed. The main advantages of this approach are the possibility of a direct comparison of...

Sawtooth, neo-classical tearing mode and error field studies in JET (2003)

Hender, T. C., Sauter, O., Alper, B., Angioni, C., De Baar, M. R., De Benedetti, M., ...

A range of ITER relevant plasma stability issues has been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawtooth seeds, scaling of m=2, n=1...

Overview of ASDEX Upgrade results (2003)

Zohm, H., Angioni, C., Arslanbekov, R., Atanasiu, C., Becker, G., Becker, W., ...

Recent results from the ASDEX Upgrade experimental campaigns 2001 and 2002 are presented. An improved understanding of energy and particle transport emerges in terms of a 'critical gradient' model...

Analytical solutions to the Grad-Shafranov equation for diverted plasmas (2003)

Atanasiu, C. V., Günter, S., Lackner, K., Miron, I. G.

Two families of exact analytical solutions of the Grad-Shafranov equation are presented by specifying the highest polynomial dependence of the plasma current density on the flux function in such a...

Type-I ELM mode structure observed by divertor thermography in ASDEX Upgrade (2003)

Eich, T., Herrmann, A., Neuhauser, J., Günter, S., ASDEX Upgrade Team

In the ASDEX Upgrade tokamak, power deposition structures on the outer divertor target surfaces during type-I Edge Localised Modes (ELMs) have been discovered by infra red thermography. These...

Confinement physics of the advanced scenario with ELMy H-mode edge in ASDEX Upgrade (2002)

Peeters,A. G., Gruber,O., Günter,S., Kaufmann,M., Meister,H., Pereverzev,G. V., ...

The confinement physics of the improved H-mode is analysed in detail. It is shown that this scenario can be largely unified with that of the standard H-mode. Transport barriers exist in the early...

Steady state advanced scenarios at ASDEX Upgrade (2002)

Sips,A.C.C., Arslanbekov,R., Atanasiu,C., Becker,W., Becker,G., Behler,K., ...

Recent experiments at ASDEX Upgrade have achieved advanced scenarios with high beta(N) (> 3) and confinement enhancement over ITER98(y, 2) scaling, H-H98y2 = 1.1-1.5, in steady state. These...

Temporal evolution of neoclassical tearing modes and its effect on confinement reduction in ASDEX Upgrade (2002)

Gude,A., Günter,S., Maraschek,M., Zohm,H.

It is shown that (3,2) neoclassical tearing modes (NTMs) in ASDEX Upgrade can, under similar external control parameters, occur at significantly different values of beta(N), with the NTMs occurring...

Numerical computation of magnetic fields of two- and three- dimensional equilibria with net toroidal current (2002)

Strumberger,E., Günter,S., Merkel,P., Schwarz,E., Tichmann,C.

The MFBE-2001 code computes the magnetic field in a form suitable for field line tracing inside and outside the plasma boundary of two- and three-dimensional finite-beta equilibria. It is a modified...

Nonideal fishbone instability (2002)

Marchenko,V. S., Günter,S., Kolesnichenko,Y. I.

It is shown that there exists a nonideal collisionless fishbone mode in toroidal plasmas, which may lead to the formation of the magnetic islands and thermal crashes during fishbone activity. The...

Reduction of the ion drive and ρ*θ scaling of the neoclassical tearing mode (2002)

Poli,E., Peeters,A. G., Bergmann,A., Günter,S., Pinches,S. D.

In the theoretical description of the neoclassical tearing mode it is usually assumed that the ion banana width w(b) is much smaller than the island width W. This assumption is questionable at least...

MHD stability analysis of type II ELMs in ASDEX Upgrade (2002)

Saarelma,S., Günter,S., Kiviniemi,T., Kurki-Suonio,T.

An MHD stability analysis of the plasmas with type 11 ELMs is presented. The stability properties in type 11 ELMy plasmas (high-q(95), high delta) are found to significantly differ from those of the...

Temporal evolution of neoclassical tearing modes and its effect on confinement reduction in ASDEX Upgrade (2002)

Gude, A., Günter, S., Maraschek, M., Zohm, H.

It is shown that (3,2) neoclassical tearing modes (NTMs) in ASDEX Upgrade can, under similar external control parameters, occur at significantly different values of beta(N), with the NTMs occurring...

Nonideal fishbone instability (2002)

Marchenko, V. S., Günter, S., Kolesnichenko, Y. I.

It is shown that there exists a nonideal collisionless fishbone mode in toroidal plasmas, which may lead to the formation of the magnetic islands and thermal crashes during fishbone activity. The...

Confinement physics of the advanced scenario with ELMy H-mode edge in ASDEX Upgrade (2002)

Peeters, A. G., Gruber, O., Günter, S., Kaufmann, M., Meister, H., Pereverzev, G. V., ...

The confinement physics of the improved H-mode is analysed in detail. It is shown that this scenario can be largely unified with that of the standard H-mode. Transport barriers exist in the early...

Reduction of the ion drive and ρ*θ scaling of the neoclassical tearing mode (2002)

Poli, E., Peeters, A. G., Bergmann, A., Günter, S., Pinches, S. D.

In the theoretical description of the neoclassical tearing mode it is usually assumed that the ion banana width w(b) is much smaller than the island width W. This assumption is questionable at least...

MHD stability analysis of type II ELMs in ASDEX Upgrade (2002)

Saarelma, S., Günter, S., Kiviniemi, T., Kurki-Suonio, T., ASDEX Upgrade Team

An MHD stability analysis of the plasmas with type 11 ELMs is presented. The stability properties in type 11 ELMy plasmas (high-q(95), high delta) are found to significantly differ from those of the...

Steady state advanced scenarios at ASDEX Upgrade (2002)

Sips, A.C.C., Arslanbekov, R., Atanasiu, C., Becker, W., Becker, G., Behler, K., ...

Recent experiments at ASDEX Upgrade have achieved advanced scenarios with high beta(N) (> 3) and confinement enhancement over ITER98(y, 2) scaling, H-H98y2 = 1.1-1.5, in steady state. These...

Numerical computation of magnetic fields of two- and three- dimensional equilibria with net toroidal current (2002)

Strumberger, E., Günter, S., Merkel, P., Schwarz, E., Tichmann, C.

The MFBE-2001 code computes the magnetic field in a form suitable for field line tracing inside and outside the plasma boundary of two- and three-dimensional finite-beta equilibria. It is a modified...