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Dynamics of the transport of ionic and atomic cesium in radio frequency-driven ion sources for ITER neutral beam injection for ITER NBI

Autor: Ursel Fantz, R. Gutser, D. Wünderlich, NI Team

Publikováno v: Plasma Physics and Controlled Fusion
Plasma Physics and Controlled Fusion, v.53 (2011)

The neutral beam injection heating system of the future ITER fusion experiment will rely on the acceleration and neutralization of negative hydrogen ions. Cesium seeding into negative-ion sources is a prerequisite to obtain the required ion current a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bc9538bd8b3a9d51f9fc91323fc414b
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/64029

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Magnetic field dependence of the plasma properties in a negative hydrogen ion source for fusion

Autor: P. McNeely, NI Team, Loic Schiesko, Ursel Fantz, P. Franzen

Publikováno v: Plasma Physics and Controlled Fusion, v.54 (2012)
Plasma Physics and Controlled Fusion

Axially resolved measurements of plasma parameters were performed by two Langmuir probes moving in parallel from the exit of the driver (where the plasma is generated) up to the extraction region neighbourhood of the IPP RF negative hydrogen ion sour

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57bcea8ffa217e45ed8a2a4ef2b396b7
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/64042

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Plasma and beam homogeneity of the RF‐driven negative hydrogen ion source for ITER NBI

Autor: P. Franzen, R. Gutser, M. Berger, D. Wünderlich, Ursel Fantz, W. Kraus, NI Team

The neutral beam injection (NBI) system of ITER is based on a large RF driven negative hydrogen ion source. For good beam transmission ITER requires a beam homogeneity of better than 10%. The plasma uniformity and the correlation with the beam homoge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c39c109c2463fa12fd13bcd24249c89
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/63967

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Invariance of Divertor Retention on External Particle Flow in Detached ASDEX Upgrade Discharges

Autor: H.-S. Bosch, R. Dux, G. Haas, A. Kallenbach, M. Kaufmann, K. Lackner, V. Mertens, H.-D. Murmann, W. Poschenrieder, H. Salzmann, J. Schweinzer, W. Suttrop, M. Weinlich, null ASDEX Upgrade team, null NI team

Publikováno v: Physical Review Letters

Divertor plasmas with strong external gas puffing in ASDEX Upgrade have shown very efficient impurity retention, increasing with the divertor neutral gas density. The experiments presented here use feedback-controlled gas puffs in discharges with dif

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92d2ae8b14713ab8b884847f61d22c9f
https://doi.org/10.1103/physrevlett.76.2499

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Effects of edge conditions on plasma confinement in ASDEX

Autor: null The ASDEX Team and The NI Team, K. McCormick, M. Bessenrodt-Weberpals, E.R. Müller, J. Neuhauser, H. Niedermeyer, W. Poschenrieder, F. Ryter, U. Schneider, F.X. Söldner, K.H. Steuer, N. Tsois, O. Vollmer, F. Wagner

Publikováno v: Journal of Nuclear Materials

Edge conditions have been varied on ASDEX by altering the divertor configuration and wall conditioning. Introduction of bypasses which allow neutral gas to enter the main chamber from the divertor by paths other than through the divertor neck greatly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c99c4b3d3cc3b5825da7fd1658cd9b0
https://doi.org/10.1016/0022-3115(90)90031-h

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Particle exhaust studies in ASDEX Upgrade

Autor: Michael Kaufmann, G. Haas, R. Schneider, NI-Team, ASDEX-Upgrade-Team, Hans-Stephan Bosch, ICRH-Team, R. Dux, K. Lackner, A. Kallenbach, ECRH-Team, W. Poschenrieder, D. P. Coster, S. De Pena Hempel, J. Neuhauser

Publikováno v: Plasma Physics and Controlled Fusion. 39:1771-1792

An experimental overview on pumping and particle exhaust studies for deuterium as well as for helium and neon in the ASDEX Upgrade divertor tokamak is presented. Strong turbomolecular pumps connected to the divertor region allow effective pumping of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::052965eb25f75e268dddd1287c14def6
https://doi.org/10.1088/0741-3335/39/11/002

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The tungsten experiment in ASDEX Upgrade

Autor: S. Deschka, K. Krieger, J. Roth, Carmen García-Rosales, Albrecht Herrmann, V. Rohde, M. Bessenrodt-Weberpals, M. Weinlich, F. Mast, W. Engelhardt, K. Asmussen, J. Gaffert, A. Thoma, R. Dux, Asdex NI-Team, Julia Fuchs, U. Wenzel, R. Neu

Publikováno v: Journal of Nuclear Materials. :678-683

Tungsten coated tiles, manufactured by plasma spray on graphite, were mounted in the divertor of the ASDEX Upgrade tokamak and cover almost 90% of the surface facing the plasma in the strike zone. Over 500 plasma discharges, among which around 300 we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e5d4d6115df39537dd77f4ef620107e5
https://doi.org/10.1016/s0022-3115(97)80121-3

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Magnetic filter field for ELISE––Concepts and design

Autor: M. Fröschle, Riccardo Nocentini, W. Kraus, Loic Schiesko, P. Franzen, D. Wünderlich, NI Team, Ursel Fantz

Publikováno v: Fusion Engineering and Design, v.88, 1015-1019 (2013)
Fusion Engineering and Design

Negative ion neutral beam injection heating systems as planned for ITER need efficient precautions in the plasma source to minimize the co-extraction of electrons and destruction of negative ions. One solution is to apply a magnetic filter field of s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ed180580a7914484a75de42c0d9f015
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/60645

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