Author :
Oz, E. ; Deng, S. ; Katsouleas, T. ; Muggli, P. ; Barnes, C.D. ; Decker, F.J. ; Hogan, M.J. ; Iverson, R. ; Johnson, D.K. ; Krejcik, P. ; O´Connell, C. ; Siemann, R.H. ; Walz, D. ; Clayton, C.E. ; Huang, C. ; Joshi, C. ; Lu, W. ; Marsh, K.A. ; Mori, W.B.
Abstract :
Evidence of particle trapping has been observed in a beam driven Plasma Wake Field Accelerator (PWFA) experiment, E164X, conducted at the Stanford Linear Accelerator Center by a collaboration which includes USC, UCLA and SLAC. Such trapping produces plasma dark current when the wakefield amplitude is above a threshold value and may place a limit on the maximum acceleration gradient in a PWFA. Trapping and dark current are enhanced when in an ionizing plasma, that is self-ionized by the beam. Here we present experimental results.
