Search Results - "Maassberg, H"

Ray-tracing code TRAVIS for ECR heating, EC current drive and ECE diagnostic by Marushchenko, N.B., Turkin, Y., Maassberg, H.

“…A description of the recently developed ray-tracing code TRAVIS is given together with the theoretical background, results of benchmarking and examples of…”
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Effects of Net Currents on the Magnetic Configuration of W7-X by Geiger, J., Beidler, C.D., Drevlak, M., Maaßberg, H., Nührenberg, C., Suzuki, Y., Turkin, Yu

“…Configurations deviating from the optimum high‐mirror configuration of W7‐X may show significant bootstrap currents being detrimental for proper island…”
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ECRH scenarios with selective heating of trapped/passing electrons in the W7-X Stellarator by Marushchenko, N B, Beidler, C D, Erckmann, V, Geiger, J, Helander, P, Laqua, H P, Maassberg, H, Turkin, Y

“…Using specific features of the magnetic equilibrium in the W7-X stellarator, the ECRH scenarios with combined X2 and X3 modes are discussed. The RF beams for…”
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Development of the Neoclassical Transport Module for the Integrated Simulation Code in Helical Plasmas by Wakasa, A., Murakami, S., Fukuyama, A., Beidler, C.D., Maaßberg, H., Yokoyama, M., Sato, M.

“…The neoclassical transport database, DCOM/NNW, is improved to evaluate the neoclassical transport flux more accurately in high‐temperature plasma in LHD…”
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Electron-Bernstein-wave current drive in an overdense plasma at the Wendelstein 7-AS stellarator by Laqua, H P, Maassberg, H, Marushchenko, N B, Volpe, F, Weller, A, Kasparek, W

“…Electron-Bernstein-wave (EBW) current drive in an overdense plasma was demonstrated at the Wendelstein 7-AS stellarator for the first time. The EBWs were…”
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ECRH and ECCD scenarios for W7-X by Marushchenko, N. B., Beidler, C. D., Erckmann, V., Geiger, J., Helander, P., Laqua, H.P., Maassberg, H., Turkin, Y.

“…The main ECRH scenarios for the W7-X Stellarator are described. Both X2 (low and moderate densities) and O2 scenarios (high density) have been studied. Since…”
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Electron cyclotron resonance heating and EC-current drive experiments at W7-AS, status at W7-X by Erckmann, V, Laqua, H.P, Maassberg, H, Geiger, J, Dammertz, G, Kasparek, W, Thumm, M

“…Electron Cyclotron Resonance Heating (ECRH) is the main heating method for both the W7-AS stellarator, which is operational, and W7-X, which is under…”
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Shafranov shift in the ‘electron root’ feature at the W7-AS stellarator by Fuchs, Ch, Geiger, J., Hartfuß, H.J., Maaßberg, H.

“…Plasma discharges at W7-AS in the ‘electron root’ regime show highly peaked electron temperature- and pressure profiles. A switch-off of the ECRH leads to a…”
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Dimensionally similar discharges in the W7-AS stellarator by STROTH, U, KÜHNER, G, MAASSBERG, H, RINGLER, H

“…Dimensionally similar discharges and energy confinement of the W7-AS stellarator were investigated. The results presented, as well as other confinement…”
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Spectra of highly ionized xenon (6-30 nm) excited in W7-as plasmas by HACKER, H. H, BURHENN, R, DINKLAGE, A, DODHY, A, DORST, D, EHMLER, H, ELSNER, A, ENDLER, M, ENGELHARDT, K, ERCKMANN, V, FENG, Y, FUCHS, C, KONDO, K, GADELMEIER, F, GEIGER, J, GIANNONE, L, GRIGULL, P, GRUENWALD, G, GRULKE, O, HARMEYER, E, HARTFUSS, H. J, HERRNEGGER, F, HIRSCH, M, ANTON, M, HOFNER, J, HOLLMANN, F, HOLZHAUER, E, IGITKHANOV, Y, JAENICKE, R, KARGER, F, KICK, M, KISSLINGER, J, KLOSE, S, KNAUER, J, ASSMUS, D, KROISS, H, KÜHNER, G, KUS, A, LAQUA, H, LIU, R, MAASSBERG, H, MARUSHCHENKO, N, MCCORMICK, K, MICHEL, G, NOKE, F, BAEUMEL, S, OTT, W, OTTE, M, PACCO-DUECHS, M. G, PENNINGSFELD, F. P, POLUNOVSKY, E, PROBST, F, PURPS, F, RUHS, N, RUST, N, SAFFERT, N. J, BEIDLER, C, BINDEMANN, T, BRAKEL, R, CATTANEI, G

“…The xenon spectrum, excited in ECR- and NBI-heated plasmas with central electron densities of around 10 m, and central electron temperatures from 0.7 to 2.5…”
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Plasma diagnostics and physics in the W7-AS stellarator by Weller, A, Baldzuhn, J, Brakel, R, Burhenn, R, Erckmann, V, Feng, Y, Fiedler, S, Geiger, J, Giannone, L, Grigull, P, Hartfuss, H.J, Hirsch, M, Hofmann, J.V, Kick, M, Konrad, C, Maassberg, H, Rust, N, Sardei, F, Suvorov, E.V

“…A survey of experimental techniques and analysis tools used at the W7-AS stellarator for the investigation of the equilibrium, stability, transport and edge…”
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Erratum: Effects of Net Currents on the Magnetic Configuration of W7-X by Geiger, J., Beidler, C.D., Drevlak, M., Maaßberg, H., Nührenberg, C., Suzuki, Y., Turkin, Yu

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Bounce-averaged Fokker-Planck code for the description of ECRH in a periodic magnetic field by Marushchenko, N., Gasparino, U., Maaßberg, H., Rome´, M.

“…A bounce-averaged Fokker-Planck code has been developed for studying electron cyclotron resonance heating of fusion plasmas in a periodic magnetic field, where…”
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Electrostatic potential variation on the flux surface and its impact on impurity transport by García-Regaña, J. M, Beidler, C. D, Turkin, Y, Kleiber, R, Helander, P, Maaßberg, H, Alonso, J. A, Velasco, J. L

“…The particle transport of impurities in magnetically confined plasmas under some conditions does not find, neither quantitatively nor qualitatively, a…”
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On neoclassical impurity transport in stellarator geometry by García-Regaña, J. M, Kleiber, R, Beidler, C. D, Turkin, Y, Maaßberg, H, Helander, P

“…The impurity dynamics in stellarators has become an issue of moderate concern due to the inherent tendency of the impurities to accumulate in the core when the…”
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Calculation of the bootstrap current profile for the TJ-II stellarator by Velasco, J. L, Allmaier, K, Lopez-Fraguas, A, Beidler, C. D, Maassberg, H, Kernbichler, W, Castejon, F, Jimenez, J. A

“…Plasma Phys. Control. Fusion 53, 115014 (2011) Calculations of the bootstrap current for the TJ-II stellarator are presented. DKES and NEO-MC codes are…”
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