High Power Laser Science and Engineering, 2019, 7 (1): 01000e16, Published Online: Mar. 26, 2019
Polarized proton beams from laser-induced plasmas Download: 501次
laser-driven plasma accelerator particle-in-cell simulations polarized gas-jet target polarized proton beams
Abstract
We report on the concept of an innovative source to produce polarized proton/deuteron beams of a kinetic energy up to several GeV from a laser-driven plasma accelerator. Spin effects have been implemented into the particle-in-cell (PIC) simulation code VLPL (Virtual Laser Plasma Lab) to make theoretical predictions about the behavior of proton spins in laser-induced plasmas. Simulations of spin-polarized targets show that the polarization is conserved during the acceleration process. For the experimental realization, a polarized HCl gas-jet target is under construction using the fundamental wavelength of a Nd:YAG laser system to align the HCl bonds and simultaneously circularly polarized light of the fifth harmonic to photo-dissociate, yielding nuclear polarized H atoms. Subsequently, their degree of polarization is measured with a Lamb-shift polarimeter. The final experiments, aiming at the first observation of a polarized particle beam from laser-generated plasmas, will be carried out at the 10 PW laser system SULF at SIOM, Shanghai.
Anna Hützen, Johannes Thomas, Jürgen Böker, Ralf Engels, Ralf Gebel, Andreas Lehrach, Alexander Pukhov, T. Peter Rakitzis, Dimitris Sofikitis, Markus Büscher. Polarized proton beams from laser-induced plasmas[J]. High Power Laser Science and Engineering, 2019, 7(1): 01000e16.