Publications (29)
Technical Status Report on Plasma Components and Systems in the context of EuPRAXIA
A. Biagioni, N. Bourgeois, F. Brandi +27
The EuPRAXIA project aims to construct two state-of-the-art accelerator facilities based on plasma accelerator technology. Plasma-based accelerators offer the possibility of a sign…
Plasma Injection Schemes for Laser-Plasma Accelerators
J. Faure
Plasma injection schemes are crucial for producing high-quality electron beams in laser-plasma accelerators. This article introduces the general concepts of plasma injection. First…
Giant Anisotropy of Spin-Orbit Splitting at the Bismuth Surface
Y. Ohtsubo, J. Mauchain, J. Faure +6
We investigate the bismuth (111) surface by means of time and angle resolved photoelectron spectroscopy. The parallel detection of the surface states below and above the Fermi leve…
Mapping the X-Ray Emission Region in a Laser-Plasma Accelerator
S. Corde, C. Thaury, K. Ta Phuoc +13
The x-ray emission in laser-plasma accelerators can be a powerful tool to understand the physics of relativistic laser-plasma interaction. It is shown here that the mapping of beta…
Controlled Betatron X-Ray Radiation from Tunable Optically Injected Electrons
S. Corde, K. Ta Phuoc, R. Fitour +5
The features of Betatron x-ray emission produced in a laser-plasma accelerator are closely linked to the properties of the relativistic electrons which are at the origin of the rad…
Ultrafast filling of an electronic pseudogap in an incommensurate crystal
V. Brouet, J. Mauchain, E. Papalazarou +11
We investigate the quasiperiodic crystal (LaS)1.196(VS2) by angle and time resolved photoemission spectroscopy. The dispersion of electronic states is in qualitative agreement with…
Impact of positive ion energy on carbon-surface production of negative ions in deuterium plasmas
D. Kogut, R. Moussaoui, Ning Ning +6
This work focuses on the production of negative-ions on graphite and diamond surfaces bombarded by positive ions in a low pressure (2 Pa) low power (20 W) capacitively coupled deut…
Vacuum laser acceleration of relativistic electrons using plasma mirror injectors
M. Thévenet, A. Leblanc, S. Kahaly +4
Accelerating particles to relativistic energies over very short distances using lasers has been a long standing goal in physics. Among the various schemes proposed for electrons, v…
Optimization and stabilization of a kilohertz laser-plasma accelerator
L. Rovige, J. Huijts, I. A. Andriyash +13
Laser plasma acceleration at kilohertz repetition rate has recently been shown to work in two different regimes, with pulse lengths of either 30 fs or 3.5 fs. We now report on a sy…
Case Studies on Plasma Wakefield Accelerator Design
J. Osterhoff, Z. Najmudin, J. Faure
The field of plasma-based particle accelerators has seen tremendous progress over the past decade and experienced significant growth in the number of activities. During this proces…
Relativistic acceleration of electrons injected by a plasma mirror into a radially polarized laser beam
N. Zaïm, M. Thévenet, A. Lifschitz +1
We propose a method to generate femtosecond, relativistic and high-charge electron bunches using few-cycle and tightly focused radially polarized laser pulses. In this scheme, the…
Observation of beam loading in a laser-plasma accelerator
C. Rechatin, X. Davoine, A. Lifschitz +5
Beam loading is the phenomenon which limits the charge and the beam quality in plasma based accelerators. An experimental study conducted with a laser-plasma accelerator is present…
Spatiotemporal dynamics of ultrarelativistic beam-plasma instabilities
P. San Miguel Claveria, X. Davoine, J. R. Peterson +28
An electron or electron-positron beam streaming through a plasma is notoriously prone to micro-instabilities. For a dilute ultrarelativistic infinite beam, the dominant instability…
Concept of a laser-plasma based electron source for sub-10 fs electron diffraction
J. Faure, B. van der Geer, B. Beaurepaire +3
We propose a new concept of an electron source for ultrafast electron diffraction with sub-10~fs temporal resolution. Electrons are generated in a laser-plasma accelerator, able to…
Direct observation of electron thermalization and electron-phonon coupling in photoexcited bismuth
J. Faure, J. Mauchain, E. Papalazarou +7
We investigate the ultrafast response of the bismuth (111) surface by means of time resolved photoemission spectroscopy. The direct visualization of the electronic structure allows…
Effect of the laser wavefront in a laser-plasma accelerator
B. Beaurepaire, A. Vernier, M. Bocoum +9
A high repetition rate electron source was generated by tightly focusing kHz, few-mJ laser pulses into an underdense plasma. This high intensity laser-plasma interaction led to sta…
High-Harmonic Generation and Correlated Electron Emission from Relativistic Plasma Mirrors at 1 kHz Repetition Rate
S. Haessler, M. Ouillé, J. Kaur +7
We report evidence for the first generation of XUV spectra from relativistic surface high-harmonic generation (SHHG) on plasma mirrors at a kilohertz repetition rate, emitted simul…
Significant reduction of electronic correlations upon isovalent Ru substitution of BaFe2As2
V. Brouet, F. Rullier-Albenque, M. Marsi +10
We present a detailed investigation of Ba(Fe0.65Ru0.35)2As2 by transport measurements and Angle Resolved photoemission spectroscopy. We observe that Fe and Ru orbitals hybridize to…
Demonstration of ultra-low emittance beams in a kHz laser wakefield accelerator and application to electron diffraction
J. Monzac, S. Smartsev, J. Huijts +12
We present a compact, cost-effective method for measuring the emittance of kHz-repetition-rate laser-wakefield accelerated electron beams using a permanent solenoid. The measured n…
Laser wakefield acceleration driven by few-cycle laser pulses in overdense plasmas
N. Zaïm, F. Böhle, M. Bocoum +6
We measure the emission of energetic electrons from the interaction between ultrashort laser pulses and a solid density plasma in the relativistic regime. We detect an electron bea…
Capturing Structural Dynamics in Crystalline Silicon Using Chirped Electrons from a Laser Wakefield Accelerator
Z. -H He, B. Beaurepaire, J. A. Nees +7
Recent progress in laser wakefield acceleration has led to the emergence of a new generation of electron and X-ray sources that may have enormous benefits for ultrafast science. Th…
Coherent Phonon Coupling to Individual Bloch States in Photoexcited Bismuth
E. Papalazarou, J. Faure, J. Mauchain +8
We investigate the temporal evolution of the electronic states at the bismuth (111) surface by means of time and angle resolved photoelectron spectroscopy. The binding energy of bu…
Relativistic electron beams driven by kHz single-cycle light pulses
D. Guénot, D. Gustas, A. Vernier +8
Laser-plasma acceleration is an emerging technique for accelerating electrons to high energies over very short distances. The accelerated electron bunches have femtosecond duration…
Electron acceleration by colliding laser beams in plasmas
A. F. Lifschitz, J. Faure, C. Rechatin +2
All-optical controlled injection and acceleration of electrons in a laser wakefield has recently been achieved (Faure et al, Nature v. 444 p. 737, 2006). Injection was made using a…
Observation of large multiple scattering effects in ultrafast electron diffraction on single crystal silicon
I. Gonzalez Vallejo, G. Gallé, B. Arnaud +8
We report on ultrafast electron diffraction on high quality single crystal silicon. The ultrafast dynamics of the Bragg peaks exhibits a giant photo-induced response which can only…
Plasma wake inhibition at the collision of two laser pulses in an underdense plasma
C. Rechatin, J. Faure, A. Lifschitz +2
An electron injector concept for laser-plasma accelerator was developed in ref [1] and [2] ; it relies on the use of counter-propagating ultrashort laser pulses. In [2], the scheme…
Interaction of ultraintense radially-polarized laser pulses with plasma mirrors
N. Zaïm, D. Guénot, L. Chopineau +5
We present experimental results of vacuum laser acceleration (VLA) of electrons using radially polarized laser pulses interacting with a plasma mirror. Tightly focused radially pol…
Quasimonoenergetic electron beams produced by colliding cross-polarized laser pulses in underdense plasmas
C. Rechatin, J. Faure, A. Lifschitz +3
The interaction of two laser pulses in an underdense plasma has proven to be able to inject electrons in plasma waves, thus providing a stable and tunable source of electrons. Wher…
Betatron emission as a diagnostic for injection and acceleration mechanisms in laser-plasma accelerators
S. Corde, C. Thaury, K. Ta Phuoc +9
Betatron x-ray emission in laser-plasma accelerators is a promising compact source that may be an alternative to conventional x-ray sources, based on large scale machines. In addit…