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Publications associées (29)

Design and implementation of a fs-Transmission Electron Microscope for time-resolved studies of strongly correlated systems and nanostructures

Luca Piazza

The integration of ultrafast laser systems with transmission electron microscopes led to the extension of conventional electron microscopy (PINEM) to the 4th dimension, time, and new techniques as photon-induced near-field electron microscopy became availa ...

EPFL2015

Concept of a multichannel spin-resolving electron analyzer based on Mott scattering

Jan Hugo Dil, Vladimir N. Strocov

The concept of a multichannel electron spin detector based on optical imaging principles and Mott scattering (iMott) is presented. A multichannel electron image produced by a standard angle-resolving (photo) electron analyzer or microscope is re-imaged by ...

International Union of Crystallography2015

Timing jitter studies of the SwissFEL Test Injector drive laser

Christoph Peter Hauri, Thomas Schietinger

To produce short X-ray pulses for SwissFEL(1), it is necessary to compress the electron bunches by a factor of 300, down to sub-fs for the attosecond operational modes. To achieve stable EEL output accurate timing of the initial electron injection at the m ...

Elsevier Science Bv2014

Moment-based, self-consistent linear analysis of gyrotron oscillators

Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Trach-Minh Tran

A new model for simulating gyrotron oscillators in the monomode time-dependent linear self-consistent regime is presented. Starting from a nonlinear time-dependent monomode model, the linearization and the following simplification of the model, based on a ...

Amer Inst Physics2014

Design and implementation of a fs-resolved transmission electron microscope based on thermionic gun technology

Fabrizio Carbone, Brett Eugene Barwick, Luca Piazza

In this paper, the design and implementation of a femtosecond-resolved ultrafast transmission electron microscope is presented, based on a thermionic gun geometry. Utilizing an additional magnetic lens between the electron acceleration and the nominal cond ...

Elsevier Science Bv2013

Electron beam apparatus

Jean Berney

A method suitable for preparing a specimen for inspection, the method comprising the steps of: irradiating a photocathode so that the photocathode emits electrons from a surface of the photocathode, wherein the emitted electrons each follow a trajectory, a ...

2012

Large Charge Extraction from Metallic Multifilamentary Nb3Sn Photocathode

Christoph Peter Hauri, Fernando Ardana Lamas

The current density limit for photoemission from metals was measured in an rf photogun to be below 10(9) A/m(2). We have achieved 1.6 x 10(11) A/m(2) by photofield emission from a new type of photocathode made from a metallic-composite, multifilamentary Nb ...

2012

Deep-ultraviolet picosecond flat-top pulses by chirp-matched sum frequency generation

Christoph Peter Hauri

Picosecond, flat-top, deep-UV pulses are needed to generate high-brightness electron beams to efficiently drive x-ray free electron lasers. Current metal photocathodes have low efficiency and therefore require high-energy pulses, and the generation of high ...

2012

Ultrafast photodoping and effective Fermi-Dirac distribution of the Dirac particles in Bi2Se3

Klaus Kern, Marco Grioni, Helmuth Berger, Philippe Bugnon, Alberto Crepaldi

We exploit time- and angle-resolved photoemission spectroscopy to determine the evolution of the out-of-equilibrium electronic structure of the topological insulator Bi2Se3. The response of the Fermi-Dirac distribution to ultrashort IR laser pulses has bee ...

Amer Physical Soc2012

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