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Enhancement of microcavity polariton relaxation under confinement

Publications associées (32)

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Development of steady-state scenarios compatible with ITER-like wall conditions

Richard Pitts, Gilles Arnoux

A key issue for steady-state tokamak operation is to determine the edge conditions that are compatible both with good core confinement and with the power handling and plasma exhaust capabilities of the plasma facing components (PFCs) and divertor systems. ...

2007

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The rapid formation of an electron internal transport barrier (eITB) is observed during a slow evolution (similar or equal to 200 ms) from a centrally peaked to a hollow current density profile, while all external actuators remain constant. The time consta ...

2005

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The particle confinement in a magnetized plasma torus with superimposed vertical magnetic field is modeled and measured experimentally. The formation of an equilibrium characterized by a parallel plasma current canceling out the grad B and curvature drifts ...

2004

Near-field spectroscopy and theoretical modeling of disordered semiconductor quantum wires

Andrea Feltrin

In this thesis work, we report scanning near-field optical photoluminescence spectroscopy measurements with at best 200 nm spatial resolution performed on disordered semiconductor V-groove AlGaAs/GaAs quantum wires. In order to interpret the results of the ...

EPFL2004

Impact of heat deposition profile on global confinement of NBI heated plasmas in the LHD

Wilfred Anthony Cooper, Terunobu Akiyama, Kenji Tanaka

Energy confinement and heat transport of net-current-free NBI heated plasmas in the large helical device (LHD) are discussed with emphasis on density and power deposition profile dependences. Although the apparent density dependence of the energy confineme ...

2003

Influence of plasma shape on transport in the TCV Tokamak

Basil Duval, Yves Martin, Jean-Marc Moret, Henri Weisen, Roland Behn

The energy confinement time of TCV Ohmic, L-mode discharges is observed to depend strongly on the plasma shape, improving slightly with elongation and degrading strongly as triangularity is increased from zero to positive values. The thermal conductivity o ...

1997

The variable configuration tokamak, TCV, in operation at CRPP since the end of 1991, is a particularly challenging machine with regard to the experimental systems that must provide essential information regarding properties of confined plasmas with strongl ...

EPFL1997

Recent progress in surface NMR-electrochemistry

Jean-Philippe Ansermet, Pierre-André Vuissoz

NMR spectroscopy is one of the newer spectroscopic techniques for investigating the static, dynamic and electronic structures of molecules adsorbed onto metal catalyst surfaces. We review recent progress in the application of solid-state NMR methods to the ...

1997

Measurement of relaxation rates in crowded NMR spectra by selective coherence transfer

Geoffrey Bodenhausen, Robert Konrat

In crowded NMR spectra, it is shown how longitudinal relaxation rates (lab.-frame rates 1/T1) can be measured by selective inversion-recovery of a chosen site A followed by selective transfer of magnetization to another site X through a scalar coupling JAX ...

1992

Direct determination of rate constants of slow dynamic processes by two-dimensional \"accordion\" spectroscopy in nuclear magnetic resonance

Geoffrey Bodenhausen

A novel class of NMR expts., based on the systematic variation of 3 time variables, permits both the identification of exchange networks and the direct measurement of the corresponding rate consts. in soln. Linear combinations of cross sections taken from ...

1982