Conveners
WG1+6
- Luis O. Silva (Istituto Superior Técnico)
WG1+6
- Luis O. Silva (Istituto Superior Técnico)
Prof.
Nikolay Andreev
(Joint Institute for High Temperatures of RAS)
05/06/2013, 16:00
WG1+6
talk
The compression and acceleration of an external electron bunch into the laser wakefield is studied and compared to analytical predictions. It is shown, for a laser propagating in a plasma channel, that the nonlinear laser pulse dynamics together with the finite laser spot size influence the electron bunch compression and acceleration due to the reduction of the laser pulse group velocity. The...
Dr
Serguei Kalmykov
(University of Nebraska - Lincoln)
05/06/2013, 16:15
WG1+6
talk
The accelerating bucket of a laser-plasma accelerator (a cavity of electron density maintained by the pulse radiation pressure) evolves slowly, in lock-step with the optical driver, and readily traps background electrons. The trapping process can thus be controlled by purely optical means.
Sharp gradients in the nonlinear refractive index produce a large frequency red-shift, localized at...
Dr
Arnaud Beck
(LAboratoire Leprince Ringuet)
05/06/2013, 16:30
WG1+6
talk
CILEX (Centre Interdisciplinaire Lumiere Extreme) is the Interdisciplinary Center on EXtreme Light. This facility located in the Paris area will host the APOLLON-10P laser, which will deliver short pulses, down to possibly 15 fs, at a still unreached instantaneous power of 10PW, and the associated infrastructures and experimental setup which will offer the possibility to perform scientific...
Mr
Remi Lehe
(Laboratoire d'Optique Appliquee (LOA))
05/06/2013, 16:45
WG1+6
talk
Although laser-wakefield accelerators have demonstrated accelerating gradient on the order of 1 TeV/m, they currently still lack the stability and bunch quality that is needed for many applications. Nevertheless, these properties strongly depend on the electron injection into the accelerating cavity, and improved bunch quality can in principle be obtained by choosing a proper method of...
Ms
Marija Vranic
(GoLP/IPFN - Instituto Superior Tecnico)
05/06/2013, 17:00
WG1+6
talk
Recent results showed that laser wakefield accelerators can provide all-optical configurations to study classical radiation reaction with present-day laser technology. In this all optical configuration self-injected electron bunches with energies on the order of 1 GeV, which have been reported by several laboratories, leave the plasma and collide head-on with an intense laser (for example...
Dr
Andrea Renato Rossi
(INFN - Milan)
05/06/2013, 17:15
WG1+6
talk
At the SPARC_LAB facility of INFN-LNF we are installing two transport
lines for ultra-short electron bunches and an ultra-intense laser pulse,
generated by the SPARC photo-injector and by the FLAME laser in a
synchronized fashion at the tens of fs level, to co-propagate inside many
different gas filled devices. The main aim of this experiment is to
demonstrate that a conventionally...
Dr
Julia Grebenyuk
(DESY)
05/06/2013, 18:00
WG1+6
talk
Plasma acceleration exploits extreme electric fields (>10 GV/m) created in a plasma by high-current beams or high-intensity laser pulses, to accelerate charged particles. One of the most important aspects of making plasma acceleration a realistic technology for a wide range of applications is understanding and controlling the process of injecting particles into the plasma wake. Accurate...
Dr
Bhooshan Paradkar
(LPGP, University of Paris Sud-11)
05/06/2013, 18:15
WG1+6
talk
Laser guiding inside a dielectric capillary tube offers a promising approach for building a multistage laser-wakefield accelerator. In this approach, a relativistic electron beam, produced externally, is injected into the wakefield, excited by the propagation of the laser pulse inside a gas filled dielectric capillary tube. In the quasi-linear regime of laser wakefield excitation, the typical...
Mr
Richard Pausch
(Helmholtz-Zentrum Dresden - Rossendorf)
05/06/2013, 18:30
WG1+6
talk
We present simulations of angularly resolved radiation spectra from laser-wakefield accelerated electrons (LWFA) based on classical Liénard-Wiechert potentials ranging from infrared to the X-ray wavelengths.
These radiation spectra give insight into the momentum distribution with a spatial resolution small enough to study in detail the electron dynamics during the formation of the wakefield,...
Mr
Nicolas Bourgeois
(University of Oxford)
05/06/2013, 18:45
WG1+6
talk
To produce high quality electron beam from laser wakefield accelerators requires control of injection and trapping of electrons by the plasma wakefield. Several techniques for controlling injection have been proposed and demonstrated, but none has been shown to control injection into linear or quasi-linear wake-fields.
We describe a scheme in which electrons ionized from a dopant by an...
Dr
Alberto Martinez de la Ossa
(DESY)
05/06/2013, 19:00
WG1+6
talk
A new strategy for controlled ionization-induced trapping of electrons in beam-driven plasma wakes is proposed.
The method exploits the strong wakefields excited by a longitudinally asymmetric ultra-relativistic electron-beam driver operating in a strong blow-out regime in order to selectively tunnel-ionize and trap electrons from a dopant species of high ionization potential. This work...
Prof.
Sandor Varro
(Wigner Research Centre of Physics, Budapest, Hungary)
05/06/2013, 19:15
WG1+6
talk
In the present contibution we show that there are closed–form exact solutions of the Dirac equation of a charged particle moving in a strong classical laser field in a medium (which may be an underdense plasma of index of permittivity em (w) = 1 – wp2/w2 ). These solutions form a doubly infinite discrete set, labeled by two integer quantum numbers, representing a quantized spectrum of momentum...
