Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 44: Experimental Methods (general) 2
T 44.6: Vortrag
Dienstag, 22. März 2022, 17:30–17:45, T-H29
Calorimeter R&D for LPA Polarimetry — •Felix Stehr1,2, Simon Bohlen1, Oleksandr Borysov1, Maryna Borysova3,1, Jennifer Popp1,2, Jenny List1, Gudrid Moortgat-Pick2,1, Jens Osterhoff1, and Kristjan Põder1 — 1Deutsches Electronen-Synchrotron DESY, Hamburg — 2University of Hamburg — 3Institute for Nuclear Research NASU, Kyiv
The LEAP (Laser Electron Acceleration with Polarization) project at DESY aims to demonstrate the generation of polarized electron beams with a Laser-Plasma-Accelerator (LPA). Due to the expected beam energy of about 50 MeV, photon transmission polarimetry will be used to determine the achieved degree of polarization.
The key observable is an energy asymmetry of photons passing through a magnetized iron absorber. The total transmitted photon energy will be in the order of tens of TeV, which needs to be measured with percent-level accuracy in order to reliably detect asymmetries of a few ten percent. This contribution will discuss the detector requirements derived from detailed Geant4-simulations of the polarimeter and compare them to a first test of a calorimeter prototype operated in the LPA beam.