Publications de Samuel Rey-Mermet

Development of the self-modulation instability of a relativistic proton bunch in plasma

Ambrogio Fasoli, Ivo Furno, Patrick Blanchard, Yanis Andrebe, Riccardo Agnello, Christine Stollberg, Sun Hee Kim, Ana Francisca Leal Silva Soares, Alban Sublet, Samuel Rey-Mermet

Self-modulation is a beam-plasma instability that is useful to drive large-amplitude wakefields with bunches much longer than the plasma skin depth. We present experimental results showing that, when increasing the ratio between the initial transverse size ...

2023

Proton Bunch Self-Modulation in Plasma with Density Gradient

Ambrogio Fasoli, Ivo Furno, Patrick Blanchard, Alan Howling, Yanis Andrebe, Amarasinghage Tharindu Dasun Perera, Ishkhan Gorgisyan, Samuel Rey-Mermet

We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400 GeV proton bunch. Results show that a positive or negative gradient increases or decreases the number of microbunches and the relative charge per microbun ...

2020

Nanoporous YSZ film in electrolyte membrane of Micro-Solid Oxide Fuel Cell

Paul Muralt, Silviu Cosmin Sandu, Yan Yan, Samuel Rey-Mermet

Yttria stabilized zirconia (YSZ) with 8 mol% Y was deposited by reactive magnetron sputtering onto oxidized (100) silicon substrates. It was possible to switch film texture from (111) to (200) by applying a strong RF substrate bias. Transmission electron m ...

2010

Micro Solid Oxide Fuel Cell in Silicon Technology with Reinforced Electrolyte Membrane

Paul Muralt, Samuel Rey-Mermet, Yan Yan

Solid oxide electrolyte membranes of sputter deposited yttria-stablized zirconia (YSZ) were integrated in silicon technology for applications in micro power generators fuelled by hydrogen or H2+CO. An electrochemically deposited nickel grid was used as mec ...

Elsevier Science, Reg Sales Off, Customer Support Dept, 655 Ave Of The Americas, New York, Ny 10010 Usa2009

Microfabricated solid oxide fuel cells

Samuel Rey-Mermet

Micro-fabricated solid oxide fuel cells (µSOFCs) are finding an increasing interest as potential power sources for portable devices such as MP3 players or laptops. The aim of this work was to fabricate a µSOFC demonstrator that works at 500°C and is fuelle ...

EPFL2008

A micro-solid oxide fuel cell system as battery replacement

Paul Muralt, Paul Victor Georges Muller, Samuel Rey-Mermet, Anna Infortuna, Dimos Poulikakos

2008

Solid oxide fuel cell membranes supported by nickel grid anode

Paul Muralt, Samuel Rey-Mermet

2008

Metallic supporting grid for ultrathin electrolyte membranes in solid oxide fuel cells

Paul Muralt, Samuel Rey-Mermet

A solid oxide fuel cell structure obtainable by selective electrochemical processing, comprising an electrolyte membrane (4) formed by a thin film more than 50nm but less than l0[mu]m thick, covering a supporting structure (1) made of a bulk substrate, the ...

2007

Oxygen reduction at thin dense La0.52Sr0.48Co0.18Fe0.82O3-delta electrodes. Part II: Experimental assessment of the reaction kinetics

Paul Muralt, Samuel Rey-Mermet, Anna Infortuna

2007

Bulk acoustic wave resonator operating at 8 GHz for gravimetric sensing of organic films

Paul Muralt, Samuel Rey-Mermet, Roman Lanz

The mass sensitivity of an AlN thin film resonators operated in air at 6-8 GHz has been investigated in theory and experiment. The 30 x 30 mu m wide resonators included a 180-300 nm thick, highly oriented AlN thin film, bottom and top electrode, and an aco ...

2006