Düsseldorf 2007 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 6: Interaction with strong laser pulses I

A 6.4: Vortrag

Montag, 19. März 2007, 17:30–17:45, 5M

Relativistic recollisions with two consecutive laser pulses — •Mario Verschl and Christoph H. Keitel — Max-Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

A novel scheme is introduced which allows for relativistic, laser-driven electron core recollisions with energies up to the high-energy regime. An electron is separated from the core by means of an intense laser pulse. The driving mechanism is the electron drift occurring in intense, propagating laser fields. A second laser pulse drives the electron back for recollision with the core. The relative intensity of these two pulses can be tuned such that the maximal kinetic energy an electron can reach in a propagating laser field, is reached at the instant of recollision.

The efficiency of collisions can be increased by reversing wave packet spreading before the electron returns to the core. This can be accomplished by means of a magnetic field pulse which has to be applied between the laser pulses. With the correct timing, the wave packet reaches its minimal spatial extension when it collides with the core. Thus efficient relativistic recollisions become feasible.