Emittance preservation through density ramp matching sections in a plasma wakefield accelerator

Emittance and Current of Electrons Trapped in a Plasma Wakefield Accelerator

In recent experiments plasma electrons became trapped in a plasma wakefield accelerator (PWFA). The transverse size of these trapped electrons on a downstream diagnostic yields an upper limit measurement of transverse normalized emittance divided by peak current, εN,x/I. The lowest upper limit for εN,x/I measured in the experiment is 1.3 ·10−10m/A.

Transverse emittance and current of multi-GeV trapped electrons in a plasma wakefield accelerator

N. Kirby, I. Blumenfeld, C. E. Clayton, F. J. Decker, M. J. Hogan, C. Huang, R. Ischebeck, R. H. Iverson, C. Joshi, T. Katsouleas, W. Lu, K. A. Marsh, S. F. Martins, W. B. Mori, P. Muggli, E. Oz, R. H. Siemann, D. R. Walz, and M. Zhou SLAC, Menlo Park, California 94025, USA University of California, Los Angeles, California 90095, USA University of Southern California, Los Angeles, California 90...

Ultralow emittance electron beams from a laser-wakefield accelerator

Positron Production in a Plasma Wakefield Accelerator

In a visit on Oct. 28, 1996 to the Center for Ultrafast Optical Studies at U. Michigan I had interesting conversations with Gerard Mourou and Don Umstadter about possible mechanisms for positron production in a plasma that is illuminated with a strong laser. I argue that positron production via a trident process (which includes Bethe-Heitler pair production) involving an isolated nucleus is pos...

A Meter-Scale Plasma Wakefield Accelerator

Plasma wakefield accelerators (PWFA) have recently shown substantial progress, attaining accelerating fields of more than 30 GV/m. The goal of the present experiment is to show that such accelerating fields can be sustained over the scale of a meter, resulting in a total energy gain comparable to the entire SLAC linear accelerator. We also seek to determine which factors limit the length of the...