1. Positron Acceleration by Plasma Wakefields Driven by a Hollow Electron Beam.
- Author
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Jain, Neeraj, Antonsen Jr., T. M., and Palastro, J. P.
- Subjects
- *
POSITRONS , *ELECTRON beams , *ACCELERATION (Mechanics) , *LASER plasma accelerators , *POSITRON beams - Abstract
A scheme for positron plasma wakefield acceleration using hollow or donut-shaped electron driver beams is studied. An annular-shaped, electron-free region forms around the hollow driver beam, creating a favorable region (longitudinal field is accelerating and transverse field is focusing) for positron acceleration. For Facility for Advanced Accelerator Experimental Tests (FACET)-like parameters, the hollow beam driver produces accelerating gradients on the order of 10 GV/m. The accelerating gradient increases linearly with the total charge in the driver beam. Simulations show acceleration of a 23-GeV positron beam to 35.4 GeV with a maximum energy spread of 0.4% and very small emittance over a plasma length of 140 cm is possible. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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