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Browsing by Author "Geiger, B."
Now showing items 1-12 of 12
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Article
A fast edge charge exchange recombination spectroscopy system at the ASDEX Upgrade tokamak
Cavedon, M.; Pütterich, T.; Viezzer, Eleonora; Dux, R.; Geiger, B.; McDermott, R. M.; Meyer, H.; Stroth, U. (AIP Publishing, 2017)In this work, a new type of high through-put Czerny-Turner spectrometer has been developed which allows us to acquire ...
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Article
A forward model for the helium plume effect and the interpretation of helium charge exchange measurements at ASDEX Upgrade
Kappatou, A.; McDermott, R. M.; Pütterich, T.; Dux, R.; Geiger, B.; Jaspers, R. J. E.; Donné, A. J. H.; Viezzer, Eleonora; Cavedon, M. (IOP Science, 2018-03-23)The analysis of the charge exchange measurements of helium is hindered by an additional emission contributing to the ...
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Article
Combination of fast-ion diagnostics in velocity-space tomographies
Salewski, M.; Geiger, B.; Nielsen, S.K.; Bindslev, H.; García Muñoz, Manuel (IOP Publishing, 2013-06)Fast-ion Dα (FIDA) and collective Thomson scattering (CTS) diagnostics provide indirect measurements of fastion velocity ...
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Evaluation of impurity densities from charge exchange recombination spectroscopy measurements at ASDEX Upgrade
McDermott, R. M.; Dux, R.; Pütterich, T.; Geiger, B.; Kappatou, A.; Lebschy, A.; Bruhn, C.; Cavedon, M.; Frank, A.; Harder, N. den; Viezzer, Eleonora (Institute of Physics Publishing, 2018-07-26)At ASDEX upgrade (AUG) a new framework for the evaluation of impurity densities based on measurements from charge exchange ...
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Article
Extensions to the charge exchange recombination spectroscopy diagnostic suite at ASDEX Upgrade
McDermott, R. M.; Lebschy, A.; Geiger, B.; Bruhn, C.; Cavedon, M.; Dunne, M. G.; Dux, R.; Fischer, R.; Kappatou, A.; Pütterich, T.; Viezzer, Eleonora (AIP Publishing, 2017)A new core charge exchange recombination spectroscopy diagnostic has been installed in the ASDEX Upgrade tokamak that is ...
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Article
Fast-ion D-alpha measurements at ASDEX Upgrade
Geiger, B.; García Muñoz, Manuel; Heidbrink, W.W.; McDermott, R. M.; Tardini, G. (IOP Publishing, 2011-06)A fast-ion D-alpha (FIDA) diagnostic has been developed for the fully tungsten coated ASDEX Upgrade (AUG) tokamak using ...
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Article
Fast-ion transport induced by Alfven eigenmodes in the ASDEX Upgrade tokamak
García Muñoz, Manuel; Classen, I. G. J.; Geiger, B.; Heidbrink, W. W.; Zeeland, M. A. van (IOP Publishing, 2011-10)A comprehensive suite of diagnostics has allowed detailed measurements of the Alfven eigenmode (AE) spatial ´ structure ...
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Article
Feasibility study for an edge main ion charge exchange recombination spectroscopy system at ASDEX Upgrade
Cano Megías, Pilar; Viezzer, Eleonora; Van Vuuren, Anton Jansen; Cavedon, M.; Cruz Zabala, Diego José; Dux, R.; Geiger, B.; García Muñoz, Manuel; Chacartegui, Ricardo (IOP Publishing, 2019)A feasibility study for a new edge main ion charge exchange recombination spectroscopy (CXRS) system at the ASDEX Upgrade ...
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Article
Measurement of a 2D fast-ion velocity distribution function by tomographic inversion of fast-ion D-alpha spectra
Salewski, M.; Geiger, B.; Jacobsen, A.S.; García Muñoz, Manuel; Heidbrink, W. W.; Korsholm, S.B.; Leipold, F.; Madsen, J.; Moseev, D.; Nielsen, S K (OP Publishing, 2014)We present the first measurement of a local fast-ion 2D velocity distribution function f(v||, v⊥). To this end, we heated ...
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Article
Measurement of a 2D fast-ion velocity distribution function by tomographic inversion of fast-ion D-alpha spectra
Salewski, M.; Geiger, B.; Jacobsen, A.S.; García Muñoz, Manuel; Heidbrink, W.W. (IOP Publishing, 2014-02)We present the first measurement of a local fast-ion 2D velocity distribution function f (v , v⊥). To this end, we heated ...
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Article
Phase-space resolved measurement of 2nd harmonic ion cyclotron heating using FIDA tomography at the ASDEX Upgrade tokamak
Weiland, M.; Bilato, R.; Geiger, B.; Schneider, P. A.; Tardini, G.; García Muñoz, Manuel; Ryter, F.; Salewski, M.; Zohm, H. (Institute of Physics Publishing, 2017)Recent upgrades to the FIDA (fast-ion D-alpha) diagnostic at ASDEX Upgrade allow to reconstruct the fast-ion phase space ...
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Article
Tomography of fast-ion velocity-space distributions from synthetic CTS and FIDA measurements
Salewski, M.; Geiger, B.; Nielsen, S.K.; Bindslev, H.; García Muñoz, Manuel (IOP Publishing, 2012-10)We compute tomographies of 2D fast-ion velocity distribution functions from synthetic collective Thomson scattering (CTS) ...