Author :
Kirby, N. ; Berry, M. ; Blumenfeld, I. ; Decker, F.-J. ; Hogan, M.J. ; Ischebeck, R. ; Iverson, R. ; Siemann, R. ; Walz, D. ; Clayton, C.E. ; Huang, C. ; Joshi, C. ; Lu, W. ; Marsh, K.A. ; Mori, W.B. ; Zhou, M. ; Katsouleas, T.C. ; Muggli, P. ; Oz, E.
Abstract :
Recent electron beam driven plasma wakefield accelerator experiments carried out at SLAC showed trapping of plasma electrons. These trapped electrons appeared on an energy spectrometer with smaller transverse size than the beam driving the wake. A connection is made between transverse size and emittance; due to the spectrometer´s resolution, this connection allows for placing an upper limit on the trapped electron emittance. The upper limit for the lowest normalized emittance measured in the experiment is 1 mm-mrad.
Keywords :
beam handling techniques; electron accelerators; electron beams; particle traps; plasma accelerators; spectrometers; wakefield accelerators; SLAC; electron beam driven plasma wakefield accelerator; emittance measurements; plasma electrons; spectrometer resolution; trapped electron emittance measurement; Acceleration; Electron beams; Electron emission; Electron traps; Focusing; Lithium; Particle beams; Plasma accelerators; Plasma measurements; Spectroscopy;
