Direct Measurement of Focusing Fields in Active Plasma Lenses
Abstract
Active plasma lenses have the potential to enable broad-ranging applications of plasma-based accelerators owing to their compact design and radially symmetric kT/m-level focusing fields, facilitating beam-quality preservation and compact beam transport. We report on the direct measurement of magnetic field gradients in active plasma lenses and demonstrate their impact on the emittance of a charged particle beam. This is made possible by the use of a well-characterized electron beam with 1.4 mm mrad normalized emittance from a conventional accelerator. Field gradients of up to 823 T/m are investigated. The observed emittance evolution is supported by numerical simulations, which suggest the potential for conservation of the core beam emittance in such a plasma lens setup.
Keywords
Cite
@article{arxiv.1803.06663,
title = {Direct Measurement of Focusing Fields in Active Plasma Lenses},
author = {J. -H. Röckemann and L. Schaper and S. K. Barber and N. A. Bobrova and G. Boyle and S. Bulanov and N. Delbos and K. Floettmann and G. Kube and W. Lauth and W. P. Leemans and V. Libov and A. Maier and M. Meisel and P. Messner and P. V. Sasorov and C. B. Schroeder and J. van Tilborg and S. Wesch and J. Osterhoff},
journal= {arXiv preprint arXiv:1803.06663},
year = {2018}
}
Comments
17 pages, 7 Figures