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TUPME042 |
Planned High-gradient Flat-beam-driven Dielectric Wakefield Experiments at the Fermilab’s Advanced Superconducting Test Accelerator |
1451 |
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- F. Lemery, D. Mihalcea, P. Piot
Northern Illinois University, DeKalb, Illinois, USA
- P. Piot, J. Zhu
Fermilab, Batavia, Illinois, USA
- J. Zhu
CAEP/IFP, Mainyang, Sichuan, People's Republic of China
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In beam driven dielectric wakefield acceleration (DWA), high-gradient short-wavelength accelerating fields are generally achieved by employing dielectric-lined waveguides (DLWs) with small aperture which constraints the beam sizes. In this paper we investigate the possibility of using a low-energy (50-MeV) flat beams to induce high-gradient wakes in a slab-symmetric DLW. We demonstrate via numerical simulations the possibility to produce axial electric field with peak amplitude close to 0.5 GV/m. Our studies are carried out using the Fermilab's Advanced Superconducting Test Accelerator (ASTA) photoinjector beamline. We finally discuss a possible experiment that could be performed in the ASTA photoinjector and eventually at higher energies.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME042
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TUPME043 |
Temporal Electron-bunch Shaping from a Photoinjector for Advanced Accelerator Applications |
1454 |
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- F. Lemery, P. Piot
Northern Illinois University, DeKalb, Illinois, USA
- P. Piot
Fermilab, Batavia, Illinois, USA
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Advanced-accelerator applications often require the production of bunches with shaped temporal distributions. An example of sought-after shape is a linearly-ramped current profile that can be improve the transformer ratio in beam-driven acceleration, or produce energy-modulated pulse for, e.g., the subsequent generation of THz radiation. Typically, such a shaping is achieved by manipulating ultra-relativistic electron bunches. In this contribution we discuss the possibility of shaping the bunch via photoemission and demonstrate using particle-in-cell simulations the production of MeV electron bunches with quasi-ramped current profile.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME043
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Export • |
reference for this paper using
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※ LaTeX,
※ Text/Word,
※ RIS,
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