Transverse Emittance and Current of Multi-GeV Trapped Electrons in a Plasma Wakefield Accelerator
- Kirby, N.
- Blumenfeld, I.
- /SLAC
- Clayton, C.E.
- /UCLA
- Decker, F.J.
- Hogan, M.J.
- /SLAC
- Huang, C.
- /UCLA
- Ischebeck, R.
- Iverson, R.H.
- /SLAC
- Joshi, C.
- /UCLA
- Katsouleas, T.
- U., /Southern California
- Lu, W.
- Marsh, K.A.
- /UCLA
- Martins, S.F.
- /Lisbon, IST
- Mori, W.B.
- /UCLA
- Muggli, P.
- Oz, E.
- U., /Southern California
- Siemann, R.H.
- Walz, D.R.
- /SLAC
- Zhou, M.
- /UCLA
Publication date
October 2009
DOI Publisher
Stanford Linear Accelerator Center ISSN
1098-4402 Citation count (estimate)
8Abstract
Multi-GeV trapped electron bunches in a plasma wakefield accelerator (PWFA) are observed with normalized transverse emittance divided by peak current, {epsilon}{sub N,x}/I{sub t}, below the level of 0.2 {micro}m/kA. A theoretical model of the trapped electron emittance, developed here, indicates that emittance scales inversely with the square root of the plasma density in the nonlinear 'bubble' regime of the PWFA. This model and simulations indicate that the observed values of {epsilon}{sub N,x}/I{sub t} result from multi-GeV trapped electron bunches with emittances of a few {micro}m and multi-kA peak currents
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