Ultralow emittance electron beams from a laser-wakefield accelerator

Authors

R. Weingartner, Max-Planck-Institut für Quantenoptik
Sebastian Raith, Universität MunchenFollow
A. Popp, Max-Planck-Institut für Quantenoptik
S. Chou, Max-Planck-Institut für Quantenoptik
J. Wenz, Max-Planck-Institut für Quantenoptik
K. Khrennikov, Max-Planck-Institut für Quantenoptik
M. Heigoldt, Max-Planck-Institut für Quantenoptik
A.R. Maier, Max-Planck-Institut für Quantenoptik
N. Kajumba, Max-Planck-Institut für Quantenoptik
Matthias Fuchs, University of Nebraska - LincolnFollow
B. Zeitler, Max-Planck-Institut für Quantenoptik
F. Krausz, Max-Planck-Institut für Quantenoptik
Stefan Karsch, Max-Planck-Institut für QuantenoptikFollow
F. Gruner, Max-Planck-Institut für QuantenoptikFollow

Date of this Version

2012

Document Type

Article

Citation

Physical Review Special Topics- Accelerators and Beams 15, 111301(2012); DOI: 10.1103/PhysRevSTAB.15.111301

Comments

Copyright 2012 The American Physical Society. Used by permission.

Abstract

Using quadrupole scan measurements we show laser-wakefield accelerated electrons to have a normalized transverse emittance of 0.21 ^+0.01_-0.02 π mm mrad at 245 MeV. We demonstrate a multishot and a single-shot method, the mean emittance values for both methods agree well. A simple model of the beam dynamics in the plasma density downramp at the accelerator exit matches the source size and divergence values inferred from the measurement. In the emerge range of 245 to 300 MeV the normalized emittance remains constant.