Scientific Commons: H. Maassberg

island divertor operation and the modelling of the results with the EMC3/EIRENE code- confinement issues with emphasis on the differences to tokamaks (isotope effect, density scaling, lack of profile...

Transport simulations for W7-X (2007)

Turkin, Y., Beidler, C. D., Dinklage, A., Geiger, J., Maassberg, H., Marushchenko, N. B., ...

Assessment of Transport in NCSX (2007)

Mikkelsen, D. R., Maassberg, H., Zarnstorff, M. C., Beidler, C. D., Houlberg, W. A., Kernbichler, W., ...

Effect of Neoclassical Transport Optimization on Electron Heat Transport in the Low-collisionality LHD Plasmas (2007)

Murakami, S., Yamada, H., Wakasa, A., Inagaki, H., Tanaka, K., Narihara, K., ...

Integrated Software Development for Wendelstein 7-X (2007)

Werner, A., Dinklage, A., Kühner, G., Maassberg, H., Schacht, J., Svensson, J., ...

Core electron-root confinement (CERC) in helical plasmas (2007)

Yokoyama, M., Maassberg, H., Beidler, C. D., Tribaldos, V., Ida, K., Estrada, T., ...

Electron Cyclotron Heating for W7-X: Physics and Technology (2007)

Erckmann, V., Brand, P., Braune, H., Dammertz, G., Gantenbein, G., Kasparek, W., ...

Ray Tracing Simulations of ECR Heating and ECE Diagnostic at W7-X Stellarator (2007)

Marushchenko, N. B., Erckmann, V., Hartfuss, H. J., Hirsch, M., Laqua, H. P., Maassberg, H., ...

Analysis of ECCD scenarios for different configurations of the W7-X Stellarator (2007)

Marushchenko, N.B., Erckmann, V., Maassberg, H., Turkin, Yu.

Effect of neoclassical transport optimization on electron heat transport in low-collisionality LHD plasmas (2007)

Murakami, S, Yamada, H, Wakasa, A, Inagaki, H, Tanaka, K, Narihara, K, ...

Core electron-root confinement (CERC) in helical plasmas (2007)

Yokoyama, M., Maassberg, H., Beidler, C. D., Tribaldos, V., Ida, K., Estrada, T., ...

Physical model assessment of the energy confinement time scaling in stellarators (2007)

Dinklage, A., Maassberg, H., Preuss, R., Irkin, Yu. A., Yamada, H., Ascasibar, E., ...

Electron cyclotron heating for W7-X: physics and technology. (2007)

Erckmann, V., Brand, P., Braune, H., Dammertz, G., Gantenbein, G., Kasparek, W., ...

Fusion Science and Technology, 52(2007) S.291-312

The electron-root feature in the WENDELSTEIN-7-AS stellarator with ECRH in O1-mode compared to X2-mode (2006)

Rome, M., Beidler, C.D., Maassberg, H., Marushchenko, N.B., Turkin, Y.A.

Venus+δf - A Bootstrap Current Calculation Module for 3D Configurations (2006)

Isaev, M.Yu., Brunner, S., Cooper, W.A., Bergmann, A., Beidler, C.D., Geiger, J., ...

Implications of the Quasi-Neutrality Condition for Neoclassical Transport in Stellarators (2006)

Beidler, C.D., Maassberg, H.

Internal Transport Barrier Physics in Helical Systems (2006)

Yokoyama, M., Maassberg, H., Ida, K., Estrada, T., Castejon, F., Minami, T., ...

Venus+δf - A Bootstrap Current Calculation Module for 3D Configurations (2006)

Isaev, M.Y., Brunner, S., Cooper, W.A., Tran, T.M., Bergmann, A., Beidler, C.D., ...

Optimization of ECE Diagnostics for the W7-X Stellarator (2006)

Marushchenko, N. B., Dinklage, A., Hirsch, M., Maassberg, H., Turkin, Yu.

Optimization of ECE Diagnostics for the W7-X Stellarator (2006)

Turkin, Yu., Maassberg, H., Beidler, C. D., Geiger, J., Marushchenko, N. B.

H-mode and Transport Barriers in Helical Systems (2006)

Wagner, F., Hirsch, M., Laqua, H. P., Maassberg, H.

Integrated Software Development for Wendelstein 7-X (2006)

Werner, A., Dinklage, A., Kühner, G., Maassberg, H., Schacht, J., Svensson, J., ...

Common features of core electron-root confinement in helical devices (2006)

Yokoyama, M, Maassberg, H, Beidler, CD, Tribaldos, V, Ida, K, Castejon, F, ...

Venus plus delta f: A bootstrap current calculation module for 3-D configurations (2006)

Isaev, M. Y., Brunner, S., Cooper, W. A., Tran, T. M., Bergmann, A., Beidler, C. D., ...

A new three-dimensional code, VENUS+delta f, for neoclassical transport calculations in nonaxisymmetric toroidal systems is presented. Numerical drift orbits from the original VENUS code and the...

W7-AS: One step of the Wendelstein stellarator line (2005)

Wagner,F., Baeumel,S., Baldzuhn,J., Basse,N., Brakel,R., Burhenn,R., ...

Electron cyclotron current drive in the Wendelstein 7-AS stellarator (2005)

Maassberg,H., Rome,M., Erckmann,V., Geiger,J., Laqua,H.P., Marushchenko,N.B., ...

W7-AS: One step of the Wendelstein stellarator line (2005)

Wagner, F., Baeumel, S., Baldzuhn, J., Basse, N., Brakel, R., Burhenn, R., ...

Electron cyclotron current drive in the Wendelstein 7-AS stellarator (2005)

Maassberg, H., Rome, M., Erckmann, V., Geiger, J., Laqua, H.P., Marushchenko, N.B., ...

Equilibrium calculations for the W7-AS stellarator with large internal current densities due to ECCD (2004)

Geiger,J., Maassberg,H., Marushchenko,N. B., Romé,M., Weller,A.

Impurity Transport Studies in the Wendelstein 7-AS Stellarator (2004)

Burhenn,R., Baldzuhn,J., Brakel,R., Ehmler,H., Giannone,L., Grigull,P., ...

Effect of Neoclassical Transport Optimization on Energetic Ion Confinement in LHD (2004)

Murakami,H., Yamada,H., Sasao,M., Isobe,M., Ozaki,T., Saida,T., ...

Equilibrium calculations for the W7-AS stellarator with large internal current densities due to ECCD (2004)

Geiger, J., Maassberg, H., Marushchenko, N. B., Romé, M., Weller, A.

Impurity Transport Studies in the Wendelstein 7-AS Stellarator (2004)

Burhenn, R., Baldzuhn, J., Brakel, R., Ehmler, H., Giannone, L., Grigull, P., ...

Effect of Neoclassical Transport Optimization on Energetic Ion Confinement in LHD (2004)

Murakami, H., Yamada, H., Sasao, M., Isobe, M., Ozaki, T., Saida, T., ...

Development of a Neoclassical Transport Database by Neural Network Fitting in LHD (2004)

Wakasa, A., Murakami, S., Yamada, H., Yokoyama, M., Maassberg, H., Beidler, C.D., ...

20 years of ECRH at W7-A and W7-AS (2003)

Erckmann,V., Gasparino,U., Laqua,H. P., Maassberg,H., Marushchenko,N. B., Renner,H., ...

NBI-driven ion cyclotron instability in the lower hybrid frequency range in the W7-AS experiment (2003)

Shalashov,A. G., Maassberg,H., Holzhauer,E., Kasparek,W., Lubyako,L. V., Suvorov,E. V., ...

The lower hybrid plasma turbulence triggered by injection of hydrogen beams at the W7-AS stellarator is investigated by the collective Thomson scattering technique and by measurement of ion cyclotron...

Estimation of electron Bernstein current drive efficiency on the W7-AS stellarator (2003)

Marushchenko,N. B., Volpe,F., Erckmann,V., Laqua,H. P., Maassberg,H.

Electron Bernstein wave heating and current drive in overdense plasmas at the Wendelstein 7-AS-Stellarator (2003)

Laqua,H. P., Erckmann,V., Volpe,F., Maassberg,H., ECRH Group,

Successful heating with 2nd, 3rd and 4th harmonic 140 GHz EBW’s and current drive with 70 GHz EBW’s was demonstrated at W7-AS. Further, temperature profiles and heat wave propagation was measured...

A demonstration of magnetic field optimization in LHD (2003)

Murakami,S., Yamada,H., Wakasa,A., Sasao,M., Isobe,M., Ozaki,T., ...

The behaviors of trapped particles in helical ripples are complicated and would enhance the radial transport of energetic particles and thermal plasma (neoclassical transport) in heliotrons. Thus the...

Major results from Wendelstein 7-AS stellarator (2003)

Wagner,F., Burhenn,R., Gadelmeier,F., Geiger,J., Hirsch,M., Laqua,H. P., ...

W7-AS operates with an island divertor, which utilises the natural edge islands of the low-shear stellarator configuration to divert the plasma. High densities (up to 4×1020m-3) and partly detached...

ECRH at W7-AS (2003)

Erckmann,V., Laqua,H. P., Maassberg,H., Marushchenko,N. B., Rome,M., Volpe,F., ...

The capability and versatility of ECRH is reviewed using W7-AS as an example experiment. A two frequency system with 70 GHz (0.4 MW) and 140 GHz (2.0 MW) is routinely operated at W7-AS. Basic heating...

Impurity transport model for the normal confinement and high density H-mode discharges in Wendelstein 7-AS (2003)

Ida,K., Burhenn,R., McCormick,K., Pasch,E., Yamada,H., Yoshinuma,M., ...

An impurity transport model based on diffusivity and the radial convective velocity is proposed as a first approach to explain the differences in the time evolution of Al XII (0.776 nm), Al XI (55...

Comparison of high-field-side and low-field-side launch ECCD in the W7-AS stellarator (2003)

Romé,M., Erckmann,V., Laqua,H. P., Maassberg,H., Marushchenko,N. B.

The electron cyclotron current drive (ECCD) with extraordinary mode at the second cyclotron harmonic launched from the high-field-side (HFS) is investigated in W7-AS stellarator. Trapped particle...

From Off-line to Real-time Analysis: Accelerating Bayesian Analysis Codes (2003)

Dinklage,A., Fischer,R., Geiger,J., Kühner,G., Maassberg,H., Svensson,J., ...

Impact of Island Geometry on Island Divertor Performance (2003)

Feng,Y., Sardei,F., Grigull,P., McCormick,K., Kisslinger,J., Reiter,D., ...

Analysis of high-β equilibria with toroidal net-current densities for W7-AS (2003)

Geiger,J., Marushchenko,N. B., Maassberg,H., Dinklage,A., Werner,A., ...

Major results from Wendelstein 7-AS stellarator (2003)

Wagner,F., Burhenn,R., Gadelmeier,F., Geiger,J., Hirsch,M., Laqua,H. P., ...

20 years of ECRH at W7-A and W7-AS (2003)

Erckmann, V., Gasparino, U., Laqua, H. P., Maassberg, H., Marushchenko, N. B., Renner, H., ...

NBI-driven ion cyclotron instability in the lower hybrid frequency range in the W7-AS experiment (2003)

Shalashov, A. G., Maassberg, H., Holzhauer, E., Kasparek, W., Lubyako, L. V., Suvorov, E. V., ...

The lower hybrid plasma turbulence triggered by injection of hydrogen beams at the W7-AS stellarator is investigated by the collective Thomson scattering technique and by measurement of ion cyclotron...

Estimation of electron Bernstein current drive efficiency on the W7-AS stellarator (2003)

Marushchenko, N. B., Volpe, F., Erckmann, V., Laqua, H. P., Maassberg, H.

Electron Bernstein wave heating and current drive in overdense plasmas at the Wendelstein 7-AS-Stellarator (2003)

Laqua, H. P., Erckmann, V., Volpe, F., Maassberg, H., ECRH Group

Successful heating with 2nd, 3rd and 4th harmonic 140 GHz EBW’s and current drive with 70 GHz EBW’s was demonstrated at W7-AS. Further, temperature profiles and heat wave propagation was measured...

A demonstration of magnetic field optimization in LHD (2003)

Murakami, S., Yamada, H., Wakasa, A., Sasao, M., Isobe, M., Ozaki, T., ...

The behaviors of trapped particles in helical ripples are complicated and would enhance the radial transport of energetic particles and thermal plasma (neoclassical transport) in heliotrons. Thus the...

Major results from Wendelstein 7-AS stellarator (2003)

Wagner, F., Burhenn, R., Gadelmeier, F., Geiger, J., Hirsch, M., Laqua, H. P., ...

W7-AS operates with an island divertor, which utilises the natural edge islands of the low-shear stellarator configuration to divert the plasma. High densities (up to 4×1020m-3) and partly detached...

ECRH at W7-AS (2003)

Erckmann, V., Laqua, H. P., Maassberg, H., Marushchenko, N. B., Rome, M., Volpe, F., ...

The capability and versatility of ECRH is reviewed using W7-AS as an example experiment. A two frequency system with 70 GHz (0.4 MW) and 140 GHz (2.0 MW) is routinely operated at W7-AS. Basic heating...

Impurity transport model for the normal confinement and high density H-mode discharges in Wendelstein 7-AS (2003)

Ida, K., Burhenn, R., McCormick, K., Pasch, E., Yamada, H., Yoshinuma, M., ...

An impurity transport model based on diffusivity and the radial convective velocity is proposed as a first approach to explain the differences in the time evolution of Al XII (0.776 nm), Al XI (55...

Comparison of high-field-side and low-field-side launch ECCD in the W7-AS stellarator (2003)

Romé, M., Erckmann, V., Laqua, H. P., Maassberg, H., Marushchenko, N. B.

The electron cyclotron current drive (ECCD) with extraordinary mode at the second cyclotron harmonic launched from the high-field-side (HFS) is investigated in W7-AS stellarator. Trapped particle...

From Off-line to Real-time Analysis: Accelerating Bayesian Analysis Codes (2003)

Dinklage, A., Fischer, R., Geiger, J., Kühner, G., Maassberg, H., Svensson, J., ...

Impact of Island Geometry on Island Divertor Performance (2003)

Feng, Y., Sardei, F., Grigull, P., McCormick, K., Kisslinger, J., Reiter, D., ...

Analysis of high-β equilibria with toroidal net-current densities for W7-AS (2003)

Geiger, J., Marushchenko, N. B., Maassberg, H., Dinklage, A., Werner, A., ...

Spectra of Highly Ionized Xenon (6-30 nm) Excited in W7-AS Plasmas (2001)

Hacker, H.H., Burhenn, R., Kondo, K., Anton, M., Assmus, D., Baeumel, S., ...

Monte Carlo Simulations Study of Neoclassical Transport in Inward Shifted LHD Configurations (2001)

Wakasa, A., Murakami, S., Maassberg, H., Beidler, C.

High Power ECCD Experiments at W7-AS (2001)

Maassberg, H., Geiger, J., Laqua, H., Marushenko, N.B., Rome, M., Wendland, C., ...