Multiple Scattering Effects on a Short Pulse Electron Beam Travelling Through Thin Beryllium Foils
| Autor: | Wisniewski, Eric, Antipov, Sergey, Conde, Manoel, Doran, Darrell, Gai, Wei, Gao, Qiang, Ha, Gwanghui, Jing, Chunguang, Liu, Wanming, Power, John, Whiteford, Charles |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| DOI: | 10.18429/jacow-napac2016-wepob20 |
| Popis: | The Argonne Wakefield Accelerator beamlines have stringent vacuum requirements (100 picotorr) necessitated by the Cesium telluride photoinjector. In direct conflict with this, the structures-based wakefield accelerator research program sometimes includes worthy but complex experimental installations with components or structures unable to meet the vacuum standards. A proposed chamber to sequester such experiments safely behind a thin beryllium (Be) window is described and the results of a study of beam-quality issues due to the multiple scattering of the beam through the window are presented and compared to GEANT4 simulations via G4beamline. Three thicknesses of Be foil were used: 30, 75 and 127 micron, probed by electron beams of three different energies: 25, 45, and 65 MeV. Multiple scattering effects were evaluated by comparing the measured transverse rms beam size for the scattered vs. unscattered beam. The experimental results are presented and compared to simulations. Results are discussed along with the implications and suggestions for the future sequestered vacuum chamber design. Proceedings of the North American Particle Accelerator Conf., NAPAC2016, Chicago, IL, USA |
| Databáze: | OpenAIRE |
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