Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Beschleuniger II
HK 45.1: Gruppenbericht
Mittwoch, 23. März 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 Willi4 — 1Institut 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.