Darmstadt 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

AKBP: Arbeitskreis Beschleunigerphysik

AKBP 8: Polarized Beams

AKBP 8.8: Vortrag

Dienstag, 15. März 2016, 18:15–18:30, S1/05 24

Aperture Studies and Detector Geometry Optimization for the S-DALINAC Møller Polarimeter using GEANT4* — •Jan Wissmann, Thore Bahlo, Joachim Enders, Thorsten Kürzeder, and Norbert Pietralla — Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany

The S-DALINAC is equipped with a source for spin polarized electrons. To determine the beam polarization at extraction, a Møller polarimeter for energies between 50 MeV and 130 MeV is to be installed between the main accelerator and the experimental setups.

Due to the limited available space, the shielding of the detectors of the Møller electron pairs from beam-induced background is challenging. In particular production of bremsstrahlung close to the detectors is to be avoided. To minimize the amount of scattered electrons close to the detector position. The spatial beam distribution needs to be constrained by an aperture while maintaining full coverage of the detectors. Different aperture designs are simulated using the GEANT4 toolkit to find the best geometric parameters. Further background reduction can be achieved by optimizing the detector geometry and introducing suitable shielding materials. We will present different aperture layouts and the detector geometry.

*Work supported by DFG through SFB 634