Transverse Envelope Dynamics of a 28.5-GeV Electron Beam in a Long Plasma

C. E. Clayton, B. E. Blue, E. S. Dodd, C. Joshi, K. A. Marsh, W. B. Mori, S. Wang, P. Catravas, S. Chattopadhyay, E. Esarey, W. P. Leemans, R. Assmann (+9 others)
2002 Physical Review Letters  
The transverse dynamics of a 28.5 GeV electron beam propagating in a 1.4 m long, 0-2 x 1014cm-3 plasma are studied experimentally in the underdense or blow-out regime. The transverse component of the wake field excited by the short electron bunch focuses the bunch, which experiences multiple betatron oscillations as the plasma density is increased. The spot size variations are observed using optical transition radiation and Cherenkov radiation. In this regime, the behavior of the spot size as a
more » ... the spot size as a function of the plasma density is well described by a simple beam envelope model. Dynamic changes of the beam envelope are observed by time resolving the Cherenkov light.
doi:10.1103/physrevlett.88.154801 pmid:11955201 fatcat:xf6v3pml6zggflm4dvaprs7ubq