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Towards powerful negative ion beams at the test facility ELISE for the ITER and DEMO NBI systems

Autor: Bernd Heinemann, Loic Schiesko, Christian Hopf, Riccardo Nocentini, U. Kurutz, M. Fröschle, R. Riedl, Roland Friedl, Ursel Fantz, W. Kraus, D. Wünderlich

Publikováno v: Nuclear Fusion

The test facility ELISE represents an important step in the European RD D−: 28 A extracted and 20 A accelerated) can be achieved or even exceeded. Issues in long pulse operation are the caesium dynamics and the stability of the co-extracted electro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d9599e236de9b439ad4f2bc963fff23
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/60460

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Investigations on Cs-free alternatives for negative ion formation in a low pressure hydrogen discharge at ion source relevant parameters

Autor: Ursel Fantz, U. Kurutz, Roland Friedl

Publikováno v: Plasma Physics and Controlled Fusion

Caesium (Cs) is applied in high power negative hydrogen ion sources to reduce a converter surface's work function and thus enabling an efficient negative ion surface formation. Inherent drawbacks with the usage of this reactive alkali metal motivate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d43f2bef3df2e6713570d1e18938684
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/39000

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Efficiency of Cs-free materials for negative ion production in H2 and D2 plasmas

Autor: Ursel Fantz, U. Kurutz, Roland Friedl

Publikováno v: AIP Conference Proceedings volume 1869
AIP Conference Proceedings

High power negative ion sources use caesium to reduce the work function of the converter surface which significantly increases the negative ion yield. Caesium, however, is a very reactive alkali-metal and shows complex redistribution dynamics in cons

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a26b7b8432795e56dec701cf05f938e1
https://doi.org/10.1063/1.4995742

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Real time neutral beam power control on MAST

Autor: C. Tame, U. Kurutz, D. Payne, D. L. Keeling, V. Dunkley, M. R. Simmonds, D. B. King, D. A. Homfray, I.E. Day, R. King, A. Benn, P. Stevenson, D. Ciric, S. Khilar

Publikováno v: Fusion Engineering and Design. 86:780-784

Real time power control of neutral beam provides an excellent tool for many different plasma physics studies. Power control at a better resolution than the level of a single injector is usually achieved by modulating individual power supplies. Howeve

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c741777f9d58279bd6e4f14e537d1367
https://doi.org/10.1016/j.fusengdes.2011.01.124

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Investigations on caesium-free alternatives for H− formation at ion source relevant parameters

Autor: Ursel Fantz, U. Kurutz

Publikováno v: AIP Conference Proceedings
AIP Conference Proceedings volume 1655

Negative hydrogen ions are efficiently produced in ion sources by the application of caesium. Due to a thereby induced lowering of the work function of a converter surface a direct conversion of impinging hydrogen atoms and positive ions into negativ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d731804de129aec53de0718ac8b9c2f7
https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/60605

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Comparison of measured and modelled negative hydrogen ion densities at the ECR-discharge HOMER

Autor: U. Kurutz, Ursel Fantz, D. Rauner

Publikováno v: AIP Conference Proceedings volume 1655
AIP Conference Proceedings

As the negative hydrogen ion density nH− is a key parameter for the investigation of negative ion sources, its diagnostic quantification is essential in source development and operation as well as for fundamental research. By utilizing the photodet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea85ec782ea690cdc2a78f69d5cd78a1
https://doi.org/10.1063/1.4916426

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Akademický článek

Investigations on Cs-free alternatives for negative ion formation in a low pressure hydrogen discharge at ion source relevant parameters.

Autor: U Kurutz, R Friedl, U Fantz

Publikováno v: Plasma Physics & Controlled Fusion; Jul2017, Vol. 59 Issue 7, p1-1, 1p

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Akademický článek

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Akademický článek

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Akademický článek

Towards powerful negative ion beams at the test facility ELISE for the ITER and DEMO NBI systems.

Autor: U. Fantz, C. Hopf, D. Wünderlich, R. Friedl, M. Fröschle, B. Heinemann, W. Kraus, U. Kurutz, R. Riedl, R. Nocentini, L. Schiesko

Publikováno v: Nuclear Fusion; Nov2017, Vol. 57 Issue 11, p1-1, 1p

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