DHIPS

DHIPS

The picture shows an overview of DHIPS: In front of a copper collimator the electron beam hits a massive radiator target. There are two target positions behind the collimator. The first one is surrounded by three High Purity Germanium detectors equipped with active Anti-Compton shielding. One detector is placed at an angle of 90° and the other two at 130° relative to the beam axis. At this target position, NRF measurements are performed. At the second target position a Compton Polarimeter is used to perform polarization measurements. The setup is shielded by lead and has a length of about 2m.
Schematical overview of DHIPS: Following the collimator two target positions are available: The first is used for standard NRF experiments and the second setup for polarization measurements.

The Darmstadt High Intensity Photon Setup (DHIPS, K. Sonnabend et al., Nucl. Instr. and Meth. A 640 (2011) 6) is situated right after the injector of the S-DALINAC electron accelerator. The incident 10 MeV electron beam is produced by the injector of the S-DALINAC. A schematical overview of this setup is presented in the Figure. Photons are generated as bremsstrahlung from electrons bombarding a massive radiator target. The originated photons pass a copper collimator and hits at a first target position a scattering sample. The sample is surrounded by three High Purity Germanium detectors equipped with active Anti-Compton shielding. At a second target position polarization measurements are performed using a Compton Polarimeter. The whole setup is shielded by lead.