Concept
Flash de l'hélium
Publications associées (40)
Gentle quantitative measurement of helium density in nanobubbles in silicon by spectrum imaging
Cécile Hébert, Duncan Thomas Lindsay Alexander, Guillaume Lucas
We propose an original method for the determination of the physical properties of nanometer sized helium bubbles using spectrum imaging in an energy-filtered transmission electron microscope. Helium bubbles synthesized by high fluence implantation and ther ...
Pergamon-Elsevier Science Ltd2015Extracting partial decay rates of helium from complex rotation: autoionizing resonances of the one-dimensional configurations
Partial autoionization rates of doubly excited one-dimensional helium in the collinear Zee and eZe configuration are obtained by means of the complex rotation method. The approach presented here relies on a projection of back-rotated resonance wave functio ...
Iop Publishing Ltd2015Embrittlement induced by the synergistic effects of radiation damage and helium in structural steels
Ferritic/martensitic steels are candidate materials for fusion reactor structural components, liquid metal containers of spallation neutron sources, and accelerator driven systems, with good radiation resistance and thermo-mechanical properties. However, e ...
EPFL2015Impact of the Normal Zone Propagations Velocity of High Temperature Superconducting Coated Conductors on Resistive Fault Current Limiters
Daniele Colangelo, Bertrand Dutoit
The engineering critical current (Ic) of the high temperature superconducting coated conductors (HTS-CCs), today available on the market, is not a uniform parameter and varies significantly along the length of the conductors. Moreover, commercial HTS-CCs h ...
Institute of Electrical and Electronics Engineers2015Helium ion irradiation induced swelling and hardening in commercial and experimental ODS steels
Manuel Alexandre Pouchon, Loïc Guillaume Fave
The radiation resistance of two promising ferritic ODS steels, PM2000 and 15CRA-3, is studied. More specifically, the effect of helium on these materials is studied by examining the swelling and hardening after He+ implantation to ∼1 dpa at 4000 appm/dpa. ...
Elsevier2014Elementary Excitations of Superfluid Helium Droplets Probed by Ion Spectroscopy
Marcel Drabbels, Xiaohang Zhang
Electronic spectra of molecules in helium droplets reveal spectral features that are related to the elementary excitations of the superfluid helium environment. In order to determine to what extend the interaction strength of the molecule with the helium a ...
Amer Chemical Soc2014Dynamics of Excited Sodium Atoms Attached to Helium Nanodroplets
Marcel Drabbels, Evgeniy Loginov
The dynamics of laser-excited sodium atoms at the surface of helium nanodroplets has been investigated as a function of quantum state. For all cases excitation of the system leads to desorption of the sodium atom from the droplet surface. The mean kinetic ...
American Chemical Society2014Results of the Test of Industrially Manufactured HTS Current Leads With Novel Design Features
Pierluigi Bruzzone, Rainer Wesche, Martin Vogel, Stephen Alfred March
In the framework of a collaboration, CRPP (Centre de Recherches en Physique des Plasmas) and WEKA AG have developed high-temperature superconductor (HTS) current leads for currents in the range of 3 to 30 kA, which are suitable for industrial fabrication. ...
Ieee-Inst Electrical Electronics Engineers Inc2014Analysis of the influence of the normal zone propagation velocity on the design of resistive fault current limiters
Daniele Colangelo, Bertrand Dutoit
Commercial high-temperature superconducting coated conductors (HTS-CCs) have low thermal diffusivity and nonuniform critical current density. These two factors lead commercial HTS-CCs to a partial quench when they are subjected to a transport current aroun ...
Iop Publishing Ltd2014Spectroscopy and Dynamics of Barium-doped Helium Nanodroplets
Marcel Drabbels, Evgeniy Loginov
Excitation spectra up to the ionization threshold are reported for barium atoms located on the surface of helium nanodroplets. For states with low principal quantum number, the resonances are substantially broadened and shifted towards higher energy with r ...
American Institute of Physics2012