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Browsing by Author "Wolfrum, E."
Now showing items 1-18 of 18
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Article
Connecting the global H-mode power threshold to the local radial electric field at ASDEX Upgrade
Cavedon, M.; Birkenmeier, G.; Pütterich, T.; Ryter, F.; Viezzer, Eleonora; Wolfrum, E.; Willensdorfer, M. (IOP Publishing, 2020)The relation between the macroscopic input power required at ASDEX Upgrade to access the H-mode Pthr and the microscopic ...
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Article
Dependence on plasma shape and plasma fueling for small ELM regimes in TCV and ASDEX Upgrade
Labit, B.; Eich, T.; Harrer, G.; Wolfrum, E.; Bernert, M.; Jet Contributors; García Muñoz, Manuel; Ayllón Guerola, Juan Manuel; Cano Megías, Pilar; Cruz Zabala, Diego José; Domínguez-Palacios Durán, Jesús José; Galdón Quiroga, Joaquín; García López, Francisco Javier; Gonzalez Martin, Javier; Rodríguez Ramos, Mauricio; Sanchís Sánchez, Lucía; Soria del Hoyo, Carlos; Toscano Jiménez, Manuel; Viezzer, Eleonora (2019-08)Within the EUROfusion MST1 Work Package, a series of experiments has been conducted on AUG and TCV devices to disentangle ...
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Article
Divertor, scrape-off layer and pedestal particle dynamics in the ELM cycle on ASDEX Upgrade
Laggner, F. M.; Keerl, S.; Gnilsen, J.; Wolfrum, E.; Bernert, M.; Carralero, D.; Guimarais, L.; Nikolaeva, V.; Potzel, S.; Cavedon, M.; Mink, F.; Dunne, M. G.; Birkenmeier, G.; Fischer, R.; Viezzer, Eleonora; Willensdorfer, M.; Wischmeier, M.; Aumayr, F. (IOP Publishing, 2018)In addition to the relaxation of the pedestal, edge localised modes (ELMs) introduce changes to the divertor and scrape-off ...
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Article
Effects of density gradients and fluctuations at the plasma edge on ECEI measurements at ASDEX Upgrade
Vanovac, B.; Wolfrum, E.; Denk, S. S.; Mink, F.; Laggner, F. M.; Birkenmeier, G.; Viezzer, Eleonora; Luhmann, N. C. (IOP Publishing, 2018)Electron cyclotron emission imaging (ECEI) provides measurements of electron temperature (Te) and its fluctuations (δTe). ...
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Presentation
Effects of strong density fluctuations at the plasma edge on ECEI measurements at ASDEX Upgrade
Vanovac, B.; Wolfrum, E.; Denk, S. S.; Mink, F.; Laggner, F. M.; Birkenmeier, G.; Viezzer, Eleonora; Luhmann, N. C. (European Physical Society (EPS), 2017) -
Article
ELM-induced cold pulse propagation in ASDEX Upgrade
García Muñoz, Manuel; Trier, E.; Wolfrum, E.; Willensdorfer, M.; Yu, Q.; EUROfusion; Hoelzl, M.; Orain, F.; García López, Francisco Javier (IOP Publishing, 2019-05)In ASDEX Upgrade, the propagation of cold pulses induced by type-I edge localized modes (ELMs) is studied using electron ...
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Article
Fast-ion redistribution and loss due to edge perturbations in the ASDEX Upgrade, DIII-D and KSTAR tokamaks
García Muñoz, Manuel; Äkäslompolo, S.; Asunta, O.; Boom, J. E.; Chen, X.; Classen, I. G. J.; Rodríguez Ramos, Mauricio; Viezzer, Eleonora; Wolfrum, E. (IOP Publishing, 2013)The impact of edge localized modes (ELMs) and externally applied resonant and non-resonant magnetic perturbations (MPs) ...
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Article
I-mode studies at ASDEX Upgrade: L-I and I-H transitions, pedestal and confinement properties
Ryter, F.; Fischer, R.; Fuchs, C.; Happel, T.; McDermott, R. M.; Viezzer, Eleonora; Wolfrum, E.; Barrera Orte, L.; Bernert, M.; Burckhart, A.; Graça, S. da; Kurzan, B.; McCarthy, P.; Pütterich, T.; Suttrop, W.; Willensdorfer, M. (IOP Publishing, 2017)The I-mode is a plasma regime obtained when the usual L-H power threshold is high, e.g. with unfavourable ion B ∇ ...
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Presentation
Inner versus outer E×B shear layer: an attempt to radially localize the L-H transition
Cavedon, M.; Dux, R.; Happel, T.; Hennequin, P.; Plank, U.; Pütterich, T.; Ryter, F.; Stroth, U.; Viezzer, Eleonora; Wolfrum, E. (European Physical Society (EPS), 2019) -
Article
Investigation of inter-ELM ion heat transport in the H-mode pedestal of ASDEX Upgrade plasmas
Viezzer, Eleonora; Fable, E.; Cavedon, M.; Angioni, C.; Dux, R.; Laggner, F. M.; Bernert, M.; Burckhart, A.; McDermott, R. M.; Pütterich, T.; Ryter, F.; Willensdorfer, M.; Wolfrum, E. (IOP Publishing, 2017)The ion heat transport in the pedestal of H-mode plasmas is investigated in various H-mode discharges with different ...
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Article
Ion heat transport dynamics during edge localized mode cycles at ASDEX Upgrade
Viezzer, Eleonora; Cavedon, M.; Fable, E.; Laggner, F. M.; McDermott, R. M.; Galdón Quiroga, Joaquín; Cano Magias, Pilar; Cruz Zabala, Diego José; Wolfrum, E. (IOP Publishing, 2018)The edge ion heat transport is analyzed in ASDEX Upgrade (AUG) by combining a comprehensive set of pedestal measurements ...
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Article
Non-parametric inference of impurity transport coefficients in the ASDEX Upgrade tokamak
Nishizawa, T.; Dux, R.; McDermott, R.M.; Sciortino, F.; Cavedon, M.; Schuster, C.; Wolfrum, E.; Von Toussaint, U.; Van Vuuren, Anton Jansen; Cruz Zabala, Diego José; Cano Megías, Pilar; Moon, C. (IOP Publishing, 2022-07)We present a non-parametric inference of impurity transport coefficients by using charge exchange recombination spectroscopy ...
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Article
On the ion and electron temperature recovery after the ELM-crash at ASDEX upgrade
Cavedon, M.; Dux, R.; Putterich, T.; Viezzer, Eleonora; Wolfrum, E.; Dunne, M. G.; Willensdorfer, M. (Elsevier, 2019)The access to fast measurements, i.e. Δt ≈ 100 µs, of the ions and the electrons during an entire edge localized cycle ...
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Article
Pedestal and Er profile evolution during an edge localized mode cycle at ASDEX Upgrade
Cavedon, M.; Pütterich, T.; Viezzer, Eleonora; Laggner, F. M.; Burckhart, A.; Dunne, M. G.; Fischer, R.; Lebschy, A.; Mink, F.; Stroth, U.; Willensdorfer, M.; Wolfrum, E. (IOP Publishing, 2017)The upgrade of the edge charge exchange recombination spectroscopy diagnostic at ASDEX Upgrade has enabled highly spatially ...
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Article
Qualification and implementation of line ratio spectroscopy on helium as plasma edge diagnostic at ASDEX Upgrade
Griener, M.; Muñoz Burgos, J.M.; Cavedon, M.; Birkenmeier, G.; Dux, R.; Kurzan, B.; Viezzer, Eleonora; Wolfrum, E. (IOP Publishing, 2018)A new thermal helium beam diagnostic has been implemented as plasma edge diagnostic at the ASDEX Upgrade (AUG) tokamak. ...
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Article
Scrape-off Layer Transport and Filament Characteristics in High-density Tokamak Regimes
Vianello, N.; Carralero, D.; Tsui, C.K.; Naulin, V.; Agostini, M.; Cziegler, I.; Labit, B.; Theiler, C.; Wolfrum, E.; Aguiam, D.; Galdón Quiroga, Joaquín; Zhang, W. (Institute of Physics Publishing, 2020)A detailed cross-device investigation on the role of filamentary dynamics in high-density regimes has been performed within ...
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Article
The radial localization of the transition from low to high confinement mode in the ASDEX Upgrade tokamak
Cavedon, M.; Happel, T.; Hennequin, P.; Dux, R.; Höfler, K.; Plank, U.; Pütterich, T.; Stroth, U.; Viezzer, Eleonora; Wolfrum, E. (Institute of Physics Publishing, 2024)A novel experimental method is applied to localize the initial suppression of turbulence, in the form of density fluctuations, ...
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Presentation
The role of radial electric field and neoclassical transport in the establishment and sustainment of the edge transport barrier in the ASDEX Upgrade tokamak
Cavedon, M.; Pütterich, T.; Viezzer, Eleonora; Birkenmeier, G.; Dunne, M. G.; Dux, R.; Fable, E.; Happel, T.; Laggner, F. M.; Wolfrum, E. (European Physical Society (EPS), 2017)