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Münster 2011 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Beschleuniger II

HK 45.1: Group Report

Wednesday, March 23, 2011, 16:30–17:00, A-1

Are laser-induced beams spin polarized?Markus Büscher1, Ilhan Engin2,1, Paul Gibbon3, Mohammad Aziz Hessan2,1, Anupam Karmakar3, Andreas Lehrach1, •Natascha Raab1, Monika Toncian4, Toma Toncian4, and Oswald Willi41Institut für Kernphysik (IKP) and Jülich Center for hadron Physics (JCHP), Forschungszentrum Jülich — 2RWTH Aachen — 3Jülich Supercomputing Center (JSC), Forschungszentrum Jülich — 4Institut für Laser-Plasma Physik (ILPP), Heinrich Heine Universität Düsseldorf

The physics of laser-plasma interactions has undergone dramatic developments in recent years, both experimentally and in the theoretical understanding of high-brightness light and particle sources. However, it is a yet untouched issue whether the laser-generated particle beams are or can be spin-polarized and, thus, whether laser-based polarized sources are conceivable.

A first measurement of the degree of polarization of laser-accelerated protons have recently been carried out at the Düsseldorf Arcturus Laser Facility where proton beams of typically 3 MeV were produced in foil targets. The results have been analysed with the help of particle-in-cell simulations to follow the generation of static magnetic field gradients (∼ 100s of Megagauss per micron) in thin foil targets.

As a next step, measurements with unpolarized H2 (for proton acceleration) and 3He gas (for 3He ions) are planned and, finally, pre-polarized 3He will be used.

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