Publication

Three-Dimensional Imaging of a Radially Propagating Plasma Blob Using Conditional Sampling Techniques

Publications associées (30)

Building a Consistent and Reproducible Database for Adsorption Evaluation in Covalent-Organic Frameworks

Aliaksandr Yakutovich, Berend Smit, Daniele Ongari, Christoph Leopold Talirz

We present a workflow that traces the path from the bulk structure of a crystalline material to assessing its performance in carbon capture from coal's postcombustion flue gases. This workflow is applied to a database of 324 covalent-organic frameworks (CO ...

2019

Cavity ring-down spectroscopy to measure negative ion density in a helicon plasma source for fusion neutral beams

Philippe Frédérique Bruno Guittienne, Alan Howling, Ivo Furno, Yanis Andrebe, Gennady Plyushchev, Rémy Jacquier, Riccardo Agnello

Cavity Ring Down Spectroscopy (CRDS) is used to measure the D- absolute density produced in the helicon plasma reactor RAID (Resonant Antenna Ion Device) at the Swiss Plasma Center. The birdcage geometry of the helicon antenna produces a homogeneous, high- ...

2018

H- ion source for CERN's Linac4 accelerator : simulation, experimental validation and optimization of the hydrogen plasma

Stefano Mattei

Linac4 is the new negative hydrogen ion (H-) linear accelerator of the European Organization for Nuclear Research (CERN). Its ion source operates on the principle of Radio-Frequency Inductively Coupled Plasma (RF-ICP) and it is required to provide 50 mA of ...

EPFL2017

Investigation of the RF efficiency of Inductively Coupled Hydrogen Plasmas at 1MHz

Minh Quang Tran, Stefano Mattei

The power requirements of RF heated sources for negative hydrogen ions in fusion are substantial, which poses strong demands on the generators and components of the RF circuit. Consequently, an increase of the RF coupling efficiency would be highly benefic ...

Amer Inst Physics2017

Neutral atom dynamics and plasma turbulence in the tokamak periphery

Christoph Wersal

Understanding the physical mechanisms at play in the interaction between turbulent plasma and neutral particles is a crucial issue that we approach in this Thesis by using a first-principles self-consistent model of the tokamak periphery implemented in the ...

EPFL2017

Outer midplane scrape-off layer profiles and turbulence in simulations of Alcator C-Mod inner-wall limited discharges

Federico David Halpern

A region of steep plasma gradients, the so-called "narrow-feature," has been found in the near scrape-off layer (SOL) of inner-wall limited (IWL) discharges. Dedicated IWL discharges were carried out in Alcator C-Mod [Marmar et al., Nucl. Fusion 55, 104020 ...

Amer Inst Physics2017

Improved confinement in high-density H-modes via modification of the plasma boundary with lower hybrid waves

Peng Xu, Christian Gabriel Theiler, Yu Lin

Injecting Lower Hybrid Range of Frequency (LHRF) waves into Alcator C-Mod's high-density H-mode plasmas has led to enhanced global energy confinement by increasing pedestal temperature and pressure gradients, decreasing the separatrix density, modifying th ...

Amer Inst Physics2015

A 3D MHD equilibrium description of nonlinearly saturated ideal external kink/peeling structures in tokamaks

Wilfred Anthony Cooper, Basil Duval, Olivier Sauter, Trach-Minh Tran, Holger Reimerdes, Laurie Porte, Jonathan Graves

Novel free boundary magnetohydrodynamic equilibrium states with spontaneous three-dimensional (3-D) deformations of the plasmaâ vacuum interface are computed. The structures obtained look like saturated ideal external kink/peeling modes. Large edge pre ...

Cambridge University Press2015

A model for the evaluation of the electric field associated with the lightning-triggering rocket wire and its corona

Farhad Rachidi-Haeri, Marcos Rubinstein, Aleksandr Smorgonskii

In this paper, we analyze the electric field at ground level during the first stage of triggered lightning experiments, i.e., during the rocket ascent and prior to the lightning initiation. At distances of some tens of meters from the triggering wire, the ...

Amer Geophysical Union2015

Plasma turbulence, suprathermal ion dynamics and code validation on the basic plasma physics device TORPEX

Ambrogio Fasoli, Ivo Furno, Mario Ludovico Podesta, Francesca Maria Poli, Benoît Labit, Alexandre Dominique Bovet, Joaquim Loizu Cisquella, Gennady Plyushchev, Davoud Iraji, Paolo Ricci, Christian Gabriel Theiler, Kyle Gustafson, Fabio Avino

The TORPEX basic plasma physics device at the Center for Plasma Physics Research (CRPP) in Lausanne, Switzerland is described. In TORPEX, simple magnetized toroidal configurations, a paradigm for the tokamak scrape-off layer (SOL), as well as more complex ...

Cambridge University Press2015