Search Results - "Wolfrum, E."

Quasi-continuous exhaust operational space by Dunne, M., Faitsch, M., Radovanovic, L., Wolfrum, E.

“…Abstract The IPED predictive pedestal code has been used to determine the critical gradients for the onset of 1) separatrix ballooning modes and 2) global…”
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First observation of edge localized modes mitigation with resonant and nonresonant magnetic perturbations in ASDEX Upgrade by Suttrop, W, Eich, T, Fuchs, J C, Günter, S, Janzer, A, Herrmann, A, Kallenbach, A, Lang, P T, Lunt, T, Maraschek, M, McDermott, R M, Mlynek, A, Pütterich, T, Rott, M, Vierle, T, Wolfrum, E, Yu, Q, Zammuto, I, Zohm, H

“…First experiments with nonaxisymmetric magnetic perturbations, toroidal mode number n=2, produced by newly installed in-vessel saddle coils in the ASDEX…”
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Quasicontinuous Exhaust Scenario for a Fusion Reactor: The Renaissance of Small Edge Localized Modes by Harrer, G. F., Faitsch, M., Radovanovic, L., Wolfrum, E., Albert, C., Cathey, A., Cavedon, M., Dunne, M., Eich, T., Fischer, R., Griener, M., Hoelzl, M., Labit, B., Meyer, H., Aumayr, F., The ASDEX Upgrade Team

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High-Throughput Quantitative Biochemical Characterization of Algal Biomass by NIR Spectroscopy; Multiple Linear Regression and Multivariate Linear Regression Analysis by Laurens, L. M. L, Wolfrum, E. J

“…One of the challenges associated with microalgal biomass characterization and the comparison of microalgal strains and conversion processes is the rapid…”
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Analysis and expansion of the quasi-continuous exhaust (QCE) regime in ASDEX Upgrade by Faitsch, M., Eich, T., Harrer, G.F., Wolfrum, E., Brida, D., David, P., Dunne, M., Gil, L., Labit, B., Stroth, U.

“…Abstract The quasi-continuous exhaust (QCE) regime, formerly known as either type-II ELM or small ELM regime is studied in ASDEX Upgrade. The regime is a…”
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Characterization of highly radiating nitrogen-seeded H-mode plasmas in unfavorable BT at ASDEX Upgrade by Chen, L., Wolfrum, E., Pan, O., Kurzan, B., Bernert, M., Brida, D., Cavedon, M., Dux, R., Fischer, R., Griener, M., Grover, O., Plank, U., Stieglitz, D., Zito, A.

“…The highly radiating nitrogen-seeded H-mode plasmas in unfavorable B _T has been characterized in the ASDEX Upgrade tokamak (AUG). Three levels of nitrogen…”
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Experimental characterization of the quasi-coherent mode in EDA H-Mode and QCE scenarios at ASDEX Upgrade by Kalis, J., Birkenmeier, G., Manz, P., Eich, T., Griener, M., Goti, R., Cavedon, M., Gil, L., Faitsch, M., Radovanovic, L., Wendler, D., Wolfrum, E., Stroth, U.

“…Abstract The quasi-coherent mode (QCM), appearing in enhanced D α high confinement mode (EDA H-mode) and quasi-continuous exhaust (QCE) plasmas has been…”
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Broadening of the power fall-off length in a high density, high confinement H-mode regime in ASDEX Upgrade by Faitsch, M., Eich, T., Harrer, G.F., Wolfrum, E., Brida, D., David, P., Griener, M., Stroth, U.

“…The search for scenarios in which tolerable power exhaust is combined with good confinement must involve high separatrix densities. We present here the first…”
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The multi-faced nature of the quasicoherent mode in EDA H-mode by Grenfell, G., Gil, L., Manz, P., Silva, C., Adamek, J., Brida, D., Conway, G.D., Eich, T., Faitsch, M., Happel, T., Spolaore, M., Stroth, U., Tal, B., Vanovac, B., Wolfrum, E.

“…Abstract In order to extend the enhanced D-Alpha H-mode to future devices, it is crucial to understand the properties of the main signature of this regime, the…”
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Effect of local wall clearance on scrape-off layer electron density profiles in ASDEX Upgrade by Tal, B., Wolfrum, E., Bernert, M., Birkenmeier, G., Brida, D., Fischer, R., Grenfell, G., Griener, M., Grover, O., Hobirk, J., Kurzan, B., Lunt, T., Schneider, P.A., Vianello, N., Wendler, D., Upgrade Team, the ASDEX

“…Abstract The plasma electron density is measured with multiple diagnostics in the scrape-off layer of the ASDEX Upgrade tokamak. The recorded values are…”
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Dynamic edge transport investigations at ASDEX Upgrade using gas puff modulation by Schuster, C.U., Wolfrum, E., Görler, T., Fable, E., Fischer, R., Griener, M., Tal, B., Angioni, C., Manz, P., Stroth, U.

“…Abstract Gas puff modulation experiments are performed at ASDEX Upgrade in L-mode, EDA H-mode and quasi-continuous exhaust discharges. Plasma density and…”
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Non-linear MHD investigations of high-confinement regimes without type-I ELMs in ASDEX Upgrade and JT-60SA by Cathey, A., Hoelzl, M., Meier, L., Dunne, M.G., Huijsmans, G.T.A., Gil, L., Harrer, G.F., Aiba, N., Cruz-Zabala, D.J., Lackner, K., Pamela, S.J.P., Viezzer, E., Wolfrum, E., Günter, S.

“…Abstract Large edge localised modes (ELMs) would cause an unacceptable reduction of material lifetime in future large tokamaks due to the significant amount of…”
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Probing non-linear MHD stability of the EDA H-mode in ASDEX Upgrade by Cathey, A., Hoelzl, M., Gil, L., Dunne, M.G., Harrer, G.F., Huijsmans, G.T.A., Kalis, J., Lackner, K., Pamela, S.J.P., Wolfrum, E., Günter, S., Team, the JOREK, Upgrade Team, the ASDEX, MST1 Team, the EUROfusion

“…Abstract Regimes of operation in tokamaks that are devoid of large edge localised modes have to be better understood to extrapolate their applicability to…”
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Evidence for strong inversed shear of toroidal rotation at the edge-transport barrier in the ASDEX upgrade by Pütterich, T, Wolfrum, E, Dux, R, Maggi, C F

“…The toroidal rotation of H-mode plasmas in ASDEX Upgrade is studied in the outermost 5 cm of the confined plasma. The projection of the rotation velocity along…”
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Compensation of plasma fluctuation induced shadowing effects in gas puff imaging data by Griener, M., Kalis, J., Wendler, D., Birkenmeier, G., Wolfrum, E., McDermott, R.M., Stroth, U.

“…For gas puff imaging (GPI) studies of turbulent processes in the plasma edge, it is often assumed that the emitted light is mainly proportional to the local…”
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Continuous observation of filaments from the confined region to the far scrape-off layer by Griener, M., Wolfrum, E., Birkenmeier, G., Faitsch, M., Fischer, R., Fuchert, G., Gil, L., Harrer, G.F., Manz, P., Wendler, D., Stroth, U.

“…The thermal helium beam diagnostic at ASDEX Upgrade can access the whole plasma edge region simultaneously with a high spatiotemporal resolution. Manifold…”
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Real-time wall conditioning by controlled injection of boron and boron nitride powder in full tungsten wall ASDEX Upgrade by Bortolon, A., Rohde, V., Maingi, R., Wolfrum, E., Dux, R., Herrmann, A., Lunsford, R., McDermott, R.M., Nagy, A., Kallenbach, A., Mansfield, D.K., Nazikian, R., Neu, R.

“…In ASDEX Upgrade with full-tungsten wall, boronization is an important tool to control tungsten sources and allow reliable operation at low collisionality. The…”
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Characterization, Genetic Variation, and Combining Ability of Maize Traits Relevant to the Production of Cellulosic Ethanol by Lorenz, A.J, Coors, J.G, De Leon, N, Wolfrum E.J, Hames, B.R, Sluiter, A.D, Weimer, P.J

“…Maize (Zea mays L.) stover has been identified as an important feedstock for the production of cellulosic ethanol. Our objectives were to measure hybrid effect…”
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Far scrape-off layer particle and heat fluxes in high density – High power scenarios by Müller, H.W., Bernert, M., Carralero, D., Kallenbach, A., Kurzan, B., Scarabosio, A., Sieglin, B., Tophøj, L., Vianello, N., Wolfrum, E.

“…The far scrape-off layer transport is studied in ASDEX Upgrade H-mode discharges with high divertor neutral density N0,div, high power across the separatrix…”
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Insights into type‐I edge localized modes and edge localized mode control from JOREK non‐linear magneto‐hydrodynamic simulations by Hoelzl, M., Huijsmans, G.T.A., Orain, F., Artola, F.J., Pamela, S., Becoulet, M., van Vugt, D., Liu, F., Futatani, S., Lessig, A., Wolfrum, E., Mink, F., Trier, E., Dunne, M., Viezzer, E., Eich, T., Vanovac, B., Frassinetti, L., Guenter, S., Lackner, K., Krebs, I.

“…Edge localized modes (ELMs) are repetitive instabilities driven by the large pressure gradients and current densities in the edge of H‐mode plasmas. Type‐I…”
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