Concept

Ionosphère

Publications associées (65)

Electrostatic turbulent structures in TORPEX plasmas

Experimental data from many Tokamaks suggest that an important fraction of radial particle and heat transport in the Scrape-Off-Layer is due to poloidally-localized propagating structures of increased plasma density (blobs). A better understanding of the m ...

2007

Lightning-induced currents in buried coaxial cables

Mario Paolone, Emanuel Petrache

We present a review of theoretical methods to compute lightning-induced currents and voltages on buried cables. The evaluation of such induced disturbances requires the calculation of the electric field produced by lightning along the cable path. We show t ...

2006

ELMS and strike point jumps

Duccio Testa, Richard Pitts

If an ELM is a peeling of flux surfaces from the plasma, due to a broken separatrix, current density is lost as well as particles and energy. The fast loss of a current-carrying plasma layer modifies the plasma equilibrium, leading to sudden shifts in the ...

2005

Active control of MHD instabilities by ECCD in ASDEX upgrade

Olivier Sauter, Timothy Goodman, Hartmut Zohm

The modification of the stability and the behaviour of core MHD with local electron cyclotron current drive (ECCD) is presented. Starting from the innermost resonant surface, the q = 1 surface, the stability and hence the sawtooth period and the size of sa ...

2005

Frequency control of type-I ELMs by magnetic triggering in ASDEX Upgrade

Yves Martin, Jonathan Bryan Lister, Hartmut Zohm

Magnetic triggering of edge localized modes (ELMs) was reported first from TCV in ohmic plasmas showing type-III ELMs. This method, showing successful locking of the ELM frequency to an imposed vertical plasma oscillation, has now also been demonstrated in ...

2004

Ultrasoft x-ray spectroscopy using multilayer mirrors on TCV

Henri Weisen

The TCV tokamak is equipped with a four-channel ultrasoft x-ray monochromator allowing low resolution (lambda/Deltalambda similar to 30) measurements in the energy range 200-800eV. Its main purpose is to simultaneously monitor emission from four of the mai ...

2004

The EGNOS Integrity Concept: Evaluation of the Ionospheric Corrections

Within the validation work of EGNOS for civil aviation, it is interesting to analyze the transmitted corrections individually. In this paper, the ionospheric model of EGNOS is compared to the one determined by an independent organization (CODE). The contin ...

2003

Synergy of CP-DGPS, Accelerometry and Magnetic Sensors for recise Trajectography in Ski Racing

Jan Skaloud

This paper presents the conceptual and technical aspects of a system in development that precisely determines athlete's trajectory through a course. Carrier phase-based (CP-DGPS) positioning represents core of the system, while tri-acial accelerometer and ...

2003

Use of genetic algorithms to extract primary lightning current parameters

José-Luis Bermudez

In this paper, we propose a method based on genetic algorithms to extract primary lightning return stroke current parameters from currents measured using instrumented towers, including the possibility of contamination by multiple reflections occuring along ...

2002

Planetary Boundary Layer ozone fluxes from combined airborne, ground based lidars and Wind profilers measurements

Hubert van den Bergh, Bertrand Calpini, Valentin Simeonov, Gilles Larchevêque

Different remote sensing techniques have been used for the analysis of the air pollution in the Milan area. Results and intercomparisons from two lidars are presented, obtained from a ground based and an airborne instrument. Combining them with range resol ...

1999

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