Compton scattering off the nucleon is one of the simplest processes that can provide valuable information for the understanding of the nucleon structure. A Wide Angle Compton Scattering experiment requires a high intensity photon source based on the CEBAF electron beam, that can safely operate in Hall A at JLab. One of the hardware tasks for a team proposing an experiment is to consolidate the design of the photon source, simulate its performance, and then build it. The solution illustrated here is an untagged bremsstrahlung γ source consisting of a 10% radiation length radiator and a normal conducting magnet to sweep incident beam electrons out of the beam line, with proper shielding inside and around the magnet, making it a sort of mini beam dump. The magnet bore has a tungsten-copper block with a set of small openings (2 mm by 20 mm), designed to be 1 m long. It will slowly move along a vertical axis to perform as a "mechanical raster", to protect the polarized target from local overheating.
|Titolo:||A Compact Photon Source for the WACS Experiment At JLab|
|Data di pubblicazione:||2016|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|