Preface This report originally was originally presented at the Workshop on the role of Plasmas in Accelerators, Tsukuba, Japan Aug 28 Sept 1, 1989. It was subsequently published as D. H. Whittum, "Continuous plasma final focus", in Nonlinear and Relativistic Effects in Plasmas, V. Stefan, ed., (AIP, New York, 1992) pp. 387-401. I am reissuing it as an ARDB Technical Note as it provides a hard-t...

Results from three-dimensional electromagnetic particle simulations of an electron-positron plasma with a relativistic electron beam (y=2) are presented. As part of the initial conditions, a poloidal magnetic field is specified, consistent with the current carried by the beam electrons. The beam undergoes pinching oscillations due to the pressure imbalance. A transverse two-stream instability i...

The space charge limited emission of ions from a target in the focus of an intense relativistic electron beam is studied analytically for the case of a spatially varying target density profile. In particular, the emission in the presence of an under-dense plasma shelf in contact with the solid density target dramatically differs from the case of an abrupt solid-vacuum boundary. It is found that...

Stimulated scattering induced by the longitudinal electric field of a pump wave is studied theoretically for the case of dense, relativistic electron beams traveling in cylindrical metal waveguides, Two processes are examined. In one, the pump wave decays parametrically into a slow and a fast space charge wave. In the other, it decays into a slow space charge wave and a TM wave of the guide. Th...

in high-intensity laser interaction with a wire target by integrated LSP modeling M. S. Wei, A. A. Solodov, J. Pasley, R. B. Stephens, D. R. Welch, and F. N. Beg Center for Energy Research, University of California at San Diego, La Jolla, California 92093, USA Fusion Science Center and Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA General Atomics, San ...

We describe a proposed all-dielectric laser-driven undulator for the generation of coherent short wavelengths and explore the required electron beam parameters for its operation. The key concept for this laser-driven undulator is its ability to provide phase synchronicity between the deflection force from the laser and the electron beam for a distance that is much greater than the laser wavelen...

A proposed GeV plasma beatwave accelerator (PBWA) requires a high power 1 pm laser running on two frequencies. The vacuum interaction between such a laser and a relativistic electron beam is one mechanism whereby the electrons can be bunched such that when injected into the PBWA they occupy only small regions of phase situated at the peaks of the accelerating field. This is exactly what is requ...

Focusing of a 15 MeV, 19 nC electron bunch by an underdense plasma lens operated just beyond the threshold of the underdense condition has been demonstrated in experiments at the Fermilab NICADD Photoinjector Laboratory (FNPL). The strong 1.9 cm focal-length plasmalens focused both transverse directions simultaneously and reduced the minimum area of the beam spot by a factor of 23. Analysis of ...

The dynamics of a relativistic plasma wave ~RPW! resonantly excited by a two frequency CO2 laser pulse and the effects of this wave on a co-propagating relativistic electron beam were studied through experiments and supporting simulations. The amplitude of the RPW and its harmonics were resolved in time and space with a Thomson scattering diagnostic. In addition, the plasma wave amplitude-lengt...