Berlin 2005 – wissenschaftliches Programm
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SYLP: Relativistische Laser-Plasma-Physik
SYLP 2: Relativistische Laser-Plasma-Physik 2
SYLP 2.3: Vortrag
Samstag, 5. März 2005, 15:00–15:20, HU Senatssaal
Sudden acceleration of ions with intense femtosecond laser-pulses — •Matthias Schnürer1,2, Sargis Ter-Avetisyan1,2, Stefan Busch1,2, Peter Nickles1,2, and Wolfgang Sandner1,2 — 1Max-Born-Institut, Max-Born-Str. 2a, 12489 Berlin — 2Transregio TR18 collaboration
If intense femtosecond Ti:Sa-laser pulses (intensity > 1018 W/cm2 , pulse duration < 50 fs) irradiate matter (thickness ∼ 10 µ m) an energetic electron population is immediately created which builds up an acceleration field for ions. In succession ions are abruptly accelerated from the plasma-vacuum interface. As shorter the laser pulse as steeper the electron distribution is formed which results in specific start conditions for the ion burst. Detailed studies of ion spectra from isolated water troplet targets as well as from plane foil targets are introduced and the acceleration behaviour, leading to deep modulations in the ion energy spectra [1], is discussed in the frame of a multi-electron temperature plasma. A creation of narrow band (monoenergetic) ion/proton spectra seems to be possible, which could give new application options in the accelerator and proton imaging technology. [1] S. Ter-Avetisyan e.a. Phys.Rev.Let. 93, 155006 (2004)