<div dir="ltr"><div>Kedves Munkatársak!<br><br></div>Ma, 13:00-kor, a karácsonyi összejövetel előtt, a Wigner SZFI Tanácstermében lesz a második Wigner Kollokvium. <br><div><div><br><br>VEISZ LÁSZLÓ<br>
Laboratory for Attosecond Physics, Max-Planck-Institut für
Quantenoptik, Garching, Germany<br>
<br>
Laser-driven electron acceleration<br>
<br>
Electron accelerators have significantly formed the frontiers of
science in the last decades. However, conventional radio-frequency
accelerator technology has reached its limits in size, costs and
accelerating gradients. Various alternative laser-based techniques
are rising, which provide solutions for the previous limitations.
One of the most promising is laser wakefield acceleration (LWFA),
in which a short laser pulse drives an electron plasma wave with
thousand times larger longitudinal fields than usual accelerating
gradients and this produces short electron bunches. LWFA has been
realized with sub-10-fs laser pulses. Furthermore, a very
efficient electron injection method utilizing shock-fronts in
supersonic gas jets has been implemented and real-time observation
of this LWFA process has been demonstrated that proofs the few
femtosecond duration of the electron pulses. Sub-5-fs relativistic
laser pulses have been used to generate weakly relativistic,
few-MeV electron energy. This source opens up a novel field of
applications, electron diffraction in the femto- or attosecond
domain. <br>
<br><br></div><div><br><br><div>Minden érdeklődőt szívesen várunk. <br></div>Asbóth János (<a href="mailto:szfi-seminar@wigner.mta.hu" target="_blank"><span>szfi</span>-seminar@<span class="">wigner</span>.mta.hu</a>)<br>
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