Publications
Publication Information
| Title | HIGH VOLTAGE DESIGN AND EVALUATION OF WIEN FILTERS FOR THE CEBAF 200 keV INJECTOR UPGRADE | ||
| Authors | G. Palacios-Serrano, H. Baumgart, C. Hernandez-Garcia, P. Adderley, J. Benesch, D. Bullard, J. Grames, A. Hofler, D. Machie, M. Poelker, M. Stutzman, R. Suleiman | ||
| JLAB number | JLAB-ACC-21-3388 | ||
| LANL number | (None) | ||
| Other number | DOE/OR/23177-5196 | ||
| Document Type(s) | (Meeting) | ||
| Category: | Diagnostics & Instrumentation |
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| Associated with EIC: | No | ||
| Supported by Jefferson Lab LDRD Funding: | No | ||
| Funding Source: | Nuclear Physics (NP) | ||
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Meeting Paper compiled for IPAC21 Proceedings Proceedings of IPAC 2021 Edited By Liu Lin, John Byrd, Regis Neuenschwander, Renan Picoreti, Volker RW Schaa JACOW (2021) Page(s) 1000 | |||
| Publication Abstract: | High-energy nuclear physics experiments at the Jefferson Lab Continuous Electron Beam Accelerator Facility (CEBAF) require highly spin-polarization electron beams, produced from strained super-lattice GaAs photocathodes, activated to negative electron affinity in a photogun operating at 130 kV dc. A pair of Wien filter spin rotators in the injector defines the orientation of the electron beam polarization at the end station target. An upgrade of the CEBAF injector to better support the upcoming Moller experiment requires increasing the electron beam energy to 200 keV, to reduce unwanted helicity correlated intensity and position systematics and provide precise control of the polarization orientation. Our contribution describes electrostatic and magnetostatic simulations for upgrading the Wien spin rotator design to be compatible with the 200 keV electron beam. This required detailed modeling using Solidworks, CST and Opera, improving the HV vacuum feedthroughs, and assembly techniques for improving electrode alignment. The electric and magnetic field components required by the Wien condition and the successful HV characterization under vacuum conditions will also be presented. | ||
| Experiment Numbers: | |||
| Group: | Ctr for Injectors&Sources | ||
| Document: | |||
| DOI: | https://doi.org/10.18429/JACoW-IPAC2021-MOPAB324 | ||
| Accepted Manuscript: | wepab254.pdf | ||
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