### Session GP9: Poster Session III: Laser and Beam-Driven Acceleration; DIII-D Tokamak I; General Tokamak; Field Reversed Configurations and Spheromaks; Mini-Conference: Integrated, Multiphysics, High-Performance Computations for Magnetic Fusion Research

9:30 AM–9:30 AM, Tuesday, November 9, 2010
Room: Riverside West

Abstract ID: BAPS.2010.DPP.GP9.13

### Abstract: GP9.00013 : Single particle dynamics in ultra intense laser fields including radiation cooling

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#### Authors:

Marija Vranic
(GoLP/IPFN - Instituto Superior Tecnico, Lisbon, Portugal)

Ricardo A. Fonseca
(GoLP/IPFN - Instituto Superior Tecnico, Lisbon, Portugal)

Luis O. Silva
(GoLP/IPFN - Instituto Superior Tecnico, Lisbon, Portugal)

Under extreme acceleration, charged particles can radiate strongly and the corresponding radiation damping/cooling can become important. This occurs when the radiated energy in a typical oscillation period (e.g. cyclotron period or laser period) is comparable to mc$^{2}$. In particular, under the presence of ultra high static fields or high intensity lasers the motion of particles in the ultrarelativistic regime can be severely affected by radiation damping. Using a single particle dynamics code and the Osiris 2.0 framework, and including radiation cooling, we have examined and identified the different qualitative regimes for single electron interaction with counter- and co-propagating ultra-intense lasers fields. For conditions where the radiation cooling is important, qualitative differences arise as compared with the scenarios where radiation cooling is absent; this is identified not only in the particle phase space trajectories, but also on the net velocity imparted to the counter-propagating electrons, and the possibility of cooling particle beams.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DPP.GP9.13