O
O. Gehre
Researcher at Max Planck Society
Publications - 104
Citations - 2768
O. Gehre is an academic researcher from Max Planck Society. The author has contributed to research in topics: Divertor & ASDEX Upgrade. The author has an hindex of 30, co-authored 104 publications receiving 2685 citations.
Papers
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Confinement Studies in L and H-Type ASDEX Discharges
M. Keilhacker,G. Becker,K. Bernhardi,A. Eberhagen,M. Elshaer,G. Fußmann,O. Gehre,J. Gernhardt,G. v. Gierke,E. Glock,G. Haas,F. Karger,S. Kissel,O. Klüber,M. Kornherr,K. Lackner,G. Lisitano,G. G. Lister,J. Massig,H. M. Mayer,K. McCormick,D. Meisel,E.B. Meservey,E. R. Mueller,H. D. Murmann,H. Niedermeyer,W. Poschenrieder,H. Rapp,B. Richter,H. Röhr,F. Ryter,F. Schneider,G. Siller,P. Smeulders,F. Soeldner,E. Speth,A. Stäbler,K. Steinmetz,K.-H. Steuer,Z. Szymanski,G. Venus,O. Vollmer,Friedrich E. Wagner +42 more
TL;DR: In this paper, the characteristics of neutral-beam-heated ASDEX discharges exhibiting either low (L)- or high (H)-confinement are described, and the most important parameter for transition to the H-mode seems to be a high edge electron temperature: Te values of -600 eV only a few centimeters inside the separatrix with radial gradients of ~300 eV/cm.
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The isotope effect in ASDEX
M. Bessenrodt-Weberpals,Friedrich E. Wagner,O. Gehre,L. Giannone,J. V. Hofmann,A. Kallenbach,K. McCormick,V. Mertens,H. D. Murmann,F. Ryter,Bill Scott,G. Siller,F. X. Söldner,A. Stäbler,K.-H. Steuer,Ulrich Stroth,N. Tsois,H. Verbeek,H. Zoohm +18 more
TL;DR: In this paper, the effect of the isotope mass on plasma parameters as observed in the ASDEX tokamak was analyzed in Ohmic as well as L mode, H mode, and H* mode scenarios.
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Observation of continuous divertor detachment in H-mode discharges in ASDEX upgrade.
O. Gruber,A. Kallenbach,Michael Kaufmann,K. Lackner,V. Mertens,J. Neuhauser,F. Ryter,H. Zohm,M. Bessenrodt-Weberpals,K. Büchl,S. Fiedler,A. R. Field,Ch. Fuchs,Carmen García-Rosales,G. Haas,Albrecht Herrmann,W. Herrmann,S. Hirsch,W. Köppendörfer,Peter Lang,G. Lieder,K. F. Mast,C. S. Pitcher,M. Schittenhelm,J. Stober,W. Suttrop,M. Troppmann,M. Weinlich,M. Albrecht,M. Alexander,K. Asmussen,M. Ballico,K. Behler,K.H. Behringer,H.-S. Bosch,Marco Brambilla,A. Carlson,D. P. Coster,L. Cupido,H.J. DeBlank,S. De Pena Hempel,S. Deschka,C. Dorn,R. Drube,R. Dux,A. Eberhagen,W. Engelhardt,H. U. Fahrbach,H. U. Feist,D. Fieg,G. Fußmann,O. Gehre,J. Gernhardt,P. Ignacz,B. Jüttner,W. Junker,T. Kass,K. Kiemer,H. Kollotzek,M. Kornherr,K. Krieger,B. Kurzan,R. Lang,Martin Laux,M. E. Manso,M. Maraschek,H. M. Mayer,Patrick J. McCarthy,D. Meisel,R. Merkel,H. D. Murmann,B. Napiontek,Dirk Naujoks,G. Neu,R. Neu,J.-M. Noterdaeme,G. Pautasso,W. Poschenrieder,Gerhard Raupp,Harald Richter,T. Richter,H. Röhr,J. Roth,Neil A. Salmon,H. Salzmann,W. Sandmann,H. B. Schilling,Harald Schneider,Ralf Schneider,Wolf-Dieter Schneider,K. Schonmann,G. Schramm,U. Schumacher,J. Schweinzer,U. Seidel,F. Serra,Ana Elisa Bauer de Camargo Silva,M. Sokoll,E. Speth,A. Stäbler,K.-H. Steuer,B. Streibl,W. Treutterer,M. Ulrich,P. Varela,H. Vernickel,O. Vollmer,H. Wedler,U. Wenzel,F. Wesner,R. Wunderlich,D. Zasche,H. P. Zehrfeld +112 more
TL;DR: Feedback-controlled puffing of neon and deuterium has been applied to control the edge-localized-mode behavior and the target plate power deposition during high-power H -mode discharges in ASDEX Upgrade.
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Improved confinement in high-density ohmic discharges in ASDEX
F. X. Söldner,Ewald Müller,Friedrich E. Wagner,Hans-Stephan Bosch,A. Eberhagen,H. U. Fahrbach,G. Fussmann,O. Gehre,Kenneth W Gentle,J. Gernhardt,O. Gruber,W. Herrmann,G. Janeschitz,M. Kornherr,K. Krieger,H. M. Mayer,K. McCormick,H. D. Murmann,J. Neuhauser,Roeland J. M. Nolte,W. Poschenrieder,H. Röhr,K.-H. Steuer,Ulrich Stroth,N. Tsois,H. Verbeek +25 more
TL;DR: The unsaturated linear rise of the energy confinement time with density, tau/sub E/approx.n-bar/sub e/, up to the density limit is recovered in Ohmically heated, discharges in ASDEX and the improved state is characterized by peaked density profiles.
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ELM frequency control by continuous small pellet injection in ASDEX upgrade
Peter Lang,J. Neuhauser,L. D. Horton,T. Eich,L. Fattorini,Julia Fuchs,O. Gehre,Albrecht Herrmann,P. Ignacz,Martin Jakobi,S. Kalvin,Michael Kaufmann,G. Kocsis,B. Kurzan,C. F. Maggi,M. E. Manso,M. Maraschek,V. Mertens,A. Mück,H. D. Murmann,R. Neu,I. Nunes,D. Reich,M. Reich,S. Saarelma,W. Sandmann,J. Stober,U. Vogl +27 more
TL;DR: In this article, deuterium pellets are injected into the ASDEX upgrade for external edge localized mode (ELM) frequency control in type-I ELMy H-mode discharge scenarios, and a moderate repetition rate close to 20 Hz was chosen to avoid over-fuelling of the core plasma.