Publication

Third harmonic X-mode absorption in a top-launch configuration on the TCV tokamak

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Selected highlights of ECH/ECCD physics studies in the TCV tokamak

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Federico Alberto Alfredo Felici, Joan Decker, Doohyun Kim, Donghyun Kim

The Tokamak a Configuration Variable, TCV, has used Electron Cyclotron Heating and Current Drive as its only auxiliary heating system for nearly two decades. In addition to basic plasma heating and current profiling, ECH and ECCD under either feedforward o ...

EDP Sciences2015

Real-Time Control of Sawteeth and NTMs in TCV and ITER

Doohyun Kim

The main goal of this thesis is to demonstrate the capability of magneto-hydrodynamic (MHD) instability control, particularly sawteeth and neoclassical tearing modes (NTMs), in order to achieve high performance operation. Experiments and simulations have b ...

EPFL2015

On the non-stiffness of edge transport in L-mode tokamak plasmas

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Stephan Brunner, Alexander Karpushov, Antoine Pierre Emmanuel Alexis Merle, Yann Camenen, Roland Behn, Doohyun Kim, Gabriele Merlo, Lucia Isabel Federspiel, Donghyun Kim

Transport analyses using first-principle turbulence codes and 11/2-D transport codes usually study radial transport properties between the tokamak plasma magnetic axis and a normalized minor radius around 0.8. In this region, heat transport shows significa ...

Amer Inst Physics2014

Dual-Band Perfect Absorber for Multispectral Plasmon-Enhanced Infrared Spectroscopy

Hatice Altug, Kai Chen

Metamaterial-based perfect absorbers utilize intrinsic loss, with the aid of appropriate structural design, to achieve near unity absorption at a certain wavelength. For most of the reported absorbers, the absorption occurs only at a single wavelength wher ...

2012

Extremely Shaped Plasmas to Improve the Tokamak Concept

Francesco Piras

Energy is essential for human existence and our future depends on plentiful and accessible sources of energy. The world population is fast growing and the average energy used per capita increases. One of the greatest challenges for human beings is that of ...

EPFL2011

The Tokamak à configuration variable (TCV) features the highest electron cyclotron wave power density available to resonantly heat (ECRH) the electrons and to drive noninductive currents in a fusion grade plasma (ECCD). In more than 15 years of exploitatio ...

EPFL2009

In the search of a fusion reactor using magnetic confinement of toroidal plasmas, many important plasma performance parameters directly depend on the shape of the plasma cross-section. The unique shaping capability of the TCV tokamak ("Tokamak à Configurat ...

2009

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Electron cyclotron resonance heating (ECRH) and current drive (ECCD), disruptive events, and sawtooth activity are all known to produce suprathermal electrons in fusion devices, motivating increasingly detailed studies of the generation and dynamics of thi ...

2008

The need of durable, economically acceptable and safe energy sources continues to stimulate studies in a field of thermonuclear fusion. The most successful solution for controlled magnetic fusion is the tokamak. The improvement of tokamak performance depen ...

EPFL2008

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Electron cyclotron resonance heating (ECRH) is a mature technology that has progressed constantly over a period of forty years, particularly as a tool in magnetic confinement fusion. As with other heating methods, this technique has seen a steady increase ...

Institute of Physics2006