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Edge Fluid Turbulence Simulations of Stellarators With GRILLIX

Contributions to Plasma Physics, EarlyView.
ABSTRACT The edge fluid turbulence code GRILLIX has recently been extended from axisymmetric tokamak geometries to support 3D stellarator configurations. Following successful proof‐of‐principle simulations published in Stegmeir et al., we present here a comprehensive simulation of the Wendelstein 7‐AS stellarator.
Andreas Stegmeir, Christoph Pitzal, Barnabas Csillag, Miguel Madeira, Marion Finkbeiner   +4 more
wiley   +1 more source

Heat Load Mitigation Studies in the W7‐X Stellarator Experiment

Contributions to Plasma Physics, EarlyView.
ABSTRACT During the experiments at the stellarator Wendelstein 7‐X (W7‐X) with fully water‐cooled plasma‐facing components (PFC), including carbon‐fiber composite (CFC) divertor targets with a thermal load capability of 10 MW/m2, high performance was achieved.
Dirk Naujoks, Amit Kharwandikar, Jasper Dettmar, Michael Endler, Joris Fellinger, Yu Gao, Joachim Geiger, Marcin Jakubowski, Thomas Sieber, Sebastian Thiede, Christian Voß, W7‐X Team   +11 more
wiley   +1 more source

Effect of Magnetic Islands on Neoclassical Heat Diffusivity in a Global Tokamak Simulation

Contributions to Plasma Physics, EarlyView.
ABSTRACT Resonant magnetic perturbations (RMPs) alter magnetic field topology via island formation and can modify core transport in toroidal fusion devices. Using the global gyrokinetic particle‐in‐cell code XGC‐S, originally developed for stellarator geometries, we quantify how island topology affects neoclassical heat transport in a circular tokamak ...
Joseph X. Li, Toseo Moritaka, Ryutaro Kanno, Gakushi Kawamura, Robert Hager, C.‐S. Chang   +5 more
wiley   +1 more source

Comparable levels of turbulent and neoclassical transport of high-Z impurities: integrated modelling in AUG, JET and C-Mod

Nuclear Fusion
Operation with beam heating is prone to central accumulation of high- Z impurities in present-day tokamaks due to a dominant neoclassical pinch. Fusion reactors are expected to have a different core transport regime for high- Z impurities, where ...
D. Fajardo, C. Angioni, C. Giroud, C. Perks, A. Loarte, M. Poradzinski, J. Rice, O. Samoylov, I. Carvalho, Z. Huang, D. Keeling, D. King, D. Kos, B. Labit, E. Litherland-Smith, S. Menmuir, N. Vianello, the ASDEX Upgrade Team, JET Contributors, the EUROfusion Tokamak Exploitation Team   +19 more
doaj   +1 more source

Neoclassical Inflation: No theory there [PDF]

The theoretical generalization that the price level is determined by the quantity of money is commonly employed as a teaching device, in abstract modeling, and as a guide to policy. It represents a profound misunderstanding of inflation. In specific, the
John Weeks
core  

Carbon dioxide emissions and vulnerability to climate change in Africa: How public goods moderate policy syndromes

Environmental Progress &Sustainable Energy, EarlyView.
Abstract Carbon dioxide (CO2) emissions and climate vulnerability are major concerns affecting sustainable development in Africa. This study assesses how the provision of public goods moderates the effects of policy syndromes on CO2 emissions and vulnerability to climate change in the continent.
Simplice A. Asongu, Judith C. M. Ngoungou, Thales Pacific Yapatake Kossele   +2 more
wiley   +1 more source

Costly Financial Intermediation in Neoclassical Growth Theory [PDF]

The neoclassical growth model is extended to include costly intermediated borrowing and lending between households. This is an important extension as substantial resources are used in intermediating the large amount of borrowing and lending between ...
Rajnish Mehra, Edward C. Prescott, Facundo Piguillem   +2 more
core   +2 more sources

What Is Neoclassical Economics? The three axioms responsible for its theoretical oeuvre, practical irrelevance and, thus, discursive power [PDF]

This paper offers a precise definition of neoclassical economics based on three axioms which lie at the latters foundations. This definition is all inclusive in that it applies as much to the neoclassical economic models of the late 19th century as it ...
Yanis Varoufakis, Christian Arnsperger
core  

From Ashes to Action: Economic Growth, Ecological Footprint, and Forest Fire Resilience in Advanced and Emerging Economies

Land Degradation &Development, EarlyView.
ABSTRACT Forest fires have escalated alarmingly, now consuming more than double the tree cover compared to two decades ago, signaling a growing and urgent environmental crisis. This study addresses the ever increasing global concern of forest fires, focusing on sustainable economic recovery while minimizing the ecological footprint amid mounting ...
Laxita Soontha, Mohammad Younus Bhat, Arfat Ahmad Sofi   +2 more
wiley   +1 more source