Concept

Décharge luminescente

Publications associées (356)

Direct current breakdown in gases for complex geometries from high vacuum to atmospheric pressure

Christoph Hollenstein, Alan Howling, Ralph Schnyder

The demand for improved performances of power transmission devices requires ever smaller dimensions and higher working voltages which lead to increased risk of breakdown, for example, in satellite slip rings. Previous works are mostly limited to breakdown ...

Iop Publishing Ltd2013

Effect of driftwood on hydraulic head of Piano Key weirs

Anton Schleiss, Michael Pfister, Blake Tullis

Driftwood is often transported by a river course during flood events and can be problematic where it accumulates at hydraulic structures. Near obstacles, driftwood can block and thus reduces the open flow area for water passage, resulting in a lowered disc ...

Erpicum et al., CRC Press, Boca Raton2013

Debris-Blocking Sensitivity of Piano Key Weirs under Reservoir-Type Approach Flow

Anton Schleiss, Michael Pfister, Blake Tullis

The collection of floating woody debris at flow control structures, such as spillways and weirs, can potentially result in reduced discharge efficiency (higher upstream head for a given weir discharge). Compared to less hydraulically-efficient control stru ...

Asce-Amer Soc Civil Engineers2013

DC Breakdown in gases for complex geometries from high vacuum to atmospheric pressure

Ralph Schnyder

This thesis presents an experimental investigation and a numerical simulation of breakdown in a ring assembly. Previous works are mostly limited to breakdown in simple geometries such as parallel plates or pin-to-plate. Here we discuss the effect of more c ...

EPFL2013

Nanosecond Pulsed Plasma Actuators

Christoph Hollenstein, Philip Peschke

This paper summarizes the results of Plasmaero (EU project) partners on the characterization of plasma actuators based on nanosecond pulsed discharges. Results cover electrical aspects, optical discharge visualizations and measurements of the plasma-induce ...

2013

Effects of LHRF on toroidal rotation in Alcator C-Mod plasmas

Christian Gabriel Theiler

Application of lower hybrid range of frequencies (LHRF) waves can induce both co- and counter-current directed changes in toroidal rotation in Alcator C-Mod plasmas, depending on the target plasma current, electron density, confinement regime and magnetic ...

2013

A case study on spatial and temporal hydraulic variability in an alpine gravel-bed stream based on the hydromorphological index of diversity

Anton Schleiss, Walter Gostner, Piotr Parasiewicz

Physical heterogeneity is a major topic in river sciences because it is known to be a key factor for ecological integrity. In this paper, we investigated the hydraulic enviroment in an alpine gravel-bed stream with an unaltered hydrological regime. The stu ...

John Wiley and Sons2013

A New Set of Electrodes for Coaxial Quarter Wave Switched Oscillators

We present a new profile for the electrodes forming the radial transmission line of a switched oscillator (SWO). The profile is formed using a curvilinear orthogonal space based on a specific 2-D transformation called logarithmic-tangent. The proposed prof ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Assessing the potential of using telecommunication microwave links in urban drainage modelling

Marc Schleiss

The ability to predict the runoff response of an urban catchment to rainfall is crucial for managing drainage systems effectively and controlling discharges from urban areas. In this paper we assess the potential of commercial microwave links (MWL) to capt ...

IWA Publishing2013

Statistics of bedload transport over steep slopes: Separation of time scales and collective motion

Christophe Ancey, Joris Heyman, François Mettra, Hongbo Ma

Steep slope streams show large fluctuations of sediment discharge across several time scales. These fluctuations may be inherent to the internal dynamics of the sediment transport process. A probabilistic framework thus seems appropriate to analyze such a ...

American Geophysical Union2013

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