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000429036 0247_ $$2arXiv$$aarXiv:1911.00135
000429036 0247_ $$2datacite_doi$$a10.3204/PUBDB-2019-04783
000429036 0247_ $$2inspire$$ainspire:1762637
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000429036 041__ $$aEnglish
000429036 0881_ $$aarXiv:1911.00135
000429036 088__ $$2arXiv$$aarXiv:1911.00135
000429036 1001_ $$0P:(DE-H253)PIP1031145$$aChen, Ye Lining$$b0$$eCorresponding author$$udesy
000429036 245__ $$aAn Improved Electron Beam Dynamics Design for Laboratory Plasma-Astrophysical Studies: a Technical Note
000429036 260__ $$c2019
000429036 300__ $$a8
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000429036 520__ $$aA technical note is given regarding our previous laboratory plasma-astrophysical studies [C.-S. Jao et al., High Energy Density Physics 32, 31-43 (2019) and Y. Chen et al., Nucl. Instrum. Methods Phys. Res., Sect. A 903, 119 (2018)]. In this note, an upgraded accelerator beamline design is proposed based on a feasible experimental setup in a realistic laboratory environment. The improved design aims to provide milliampere (mA) mega-electron-volt (MeV) quasi-continuous (cw) electron beams for plasma-astrophysical applications. Such a design utilizes a so-called mixed-guiding-field magnetic system right after the cut disk structure (CDS) booster cavity to provide a periodic longitudinal focusing field. The transportation of the produced cw beam with large energy spread to the plasma cell location is improved. The magnetic field serves as well as a seeding field in the plasma environment for the growth of electromagnetic instabilities. In conjunction with the appliance of a circular collimator at the exit of the CDS, the new design allows production of quasi-cw beams with a three orders higher number density at the entrance of the plasma cell compared to the previous design for a seeding magnetic field of about 50 mT while the locally enhanced electric field at the cathode is up to 8 GV/m. The associated beam dynamics simulation results are presented. As proof of principle studies, the produced electron beams are applied in nonlinear plasma-astrophysical simulations for exploring the growth of the instabilities. The extracted parameters and/or distributions from the generated electron beams in the laboratory environment are used in these particle-in-cell simulations. The obtained results are presented and discussed.
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000429036 7001_ $$0P:(DE-H253)PIP1029797$$aJao, Chun-Sung$$b1
000429036 8564_ $$uhttps://arxiv.org/abs/1911.00135
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