Transformer-ratio optimization in nonlinearly driven hollow plasma channels
Abstract
Acceleration to high energies in electron-driven wakefield accelerators requires a carefully tailored drive beam. High driver currents can, however, modify the accelerating structure response, shifting the optimal driver profile. In this work we present a simple model to describe this nonlinear beamloading in hollow plasma channels. The increase in channel radius and the generation of a return current in the bulk plasma act to modify the resonant frequency and accelerator loss factor. Modeling these effects allows the optimal driver profile to be calculated.
- Publication:
-
Physical Review Accelerators and Beams
- Pub Date:
- February 2019
- DOI:
- 10.1103/PhysRevAccelBeams.22.021003
- Bibcode:
- 2019PhRvS..22b1003F