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Plasma Wakefield Experiments at ANL and FNAL

A history of significant plasma experiments performed by PBPL personnel

Proof-of-Principle PWFA

"Experimental Observation of Plasma Wake-field Acceleration'', J.B. Rosenzweig, et al., Phys. Rev. Letters 61, 98 (1988).

Witness beam centroid as a function of delay time in proof-of-principle PWFA measurement

First Observation of Nonlinear Plasma Wakefields

"Experimental Measurement of Nonlinear Plasma Wake-fields", J. B. Rosenzweig, et al., Phys. Rev. A - Rapid Comm. 39, 1586 (1989).

Witness beam centroid as a function of delay time in nonlinear PWFA measurement

Overdense beam self-focusing

"Demonstration of Electron Beam Self-focusing in Plasma Wake-fields'', J.B. Rosenzweig, et al,, Phys. Fluids B 2, 1376 (1990).

Time resolved image of beam core showing formation of a Bennnett-like profile in an overdense plasma (top); no plasma case (bottom)

Underdense beam guiding

"Propagation of Short Electron Pulses in a Plasma Ion Chanel" N. Barov, M.E. Conde, W. Gai, and J.B. Rosenzweig, Physical Review Letters. 80, 81 (1998).

Time resolved focusing of beam using streak camera at end of plasma, showing guiding in beam core

First measurement of PWFA in the “blowout regime”

N. Barov, J. B. Rosenzweig, M. E. Conde, W. Gai, and J. G. Power “Observation of plasma wakefield acceleration in the underdense regime” Physical Review Special Topics Accelerators and Beams 3 011301 (2000).

Streak camera trace of drive and witness beams

Image of electron beam after plasma in spectrometer

High gradient PWFA deceleration with compressed beam

High gradient PWFA acceleration with compressed beam

Transition trapping injection

M. C. Thompson, J. B. Rosenzweig, H. Suk, “Plasma density transition trapping as a possible high-brightness electron beam source”, Phys. Rev. ST. – Accel. Beams, 7, 011301 (2004)

Simulation of beam captured in UCLA/FNAL transition trapping expt.

Plasma source UCLA/FNAL transition trapping expt. (side view)