# Photon Masks for the ILC Positron Source with 175 and 250 GeV Electron Drive Beam

@inproceedings{Alharbi2021PhotonMF, title={Photon Masks for the ILC Positron Source with 175 and 250 GeV Electron Drive Beam}, author={Khaled Alharbi and S. Riemann and Ayash Alrashdi and Gudrid A. Moortgat-Pick and Andriy Ushakov and Peter Sievers . King AbdulAziz City for Science and Technology and Riyadh and Kingdom of Saudi Arabia and University of Hamburg and Hamburg and H Germany and Deutsches Elektronen-Synchrotron and Zeuthen and Cern and Geneva and Switzerland.}, year={2021} }

In the future the International Linear Collider (ILC), a helical undulator-based polarized positron source, is expected to be chosen. A high energy electron beam passes through a superconducting helical undulator in order to create circularly polarized photons which will be directed to a conversion target, resulting in electron-positron pairs. The resulting positron beam is longitudinally polarized. Since the photons are produced with an opening angle and pass through a long superconducting… Expand

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