Ramped Electron Bunch Experiment

This page was prepared by R. Joel England. Last update Jan 26, 2007.

Introduction

The Ramped Electron Bunch Experiment at the UCLA Neptune Laboratory is a novel electron bunch compression scheme for producing picosecond to sub-picosecond bunches using a dispersionless translating section (or "dogleg") as a bunch compressor, with sextupole correction implemented to eliminate undesirable nonlinear effects. Simulations conducted using PARMELA and ELEGANT indicate that this type of compression scheme is capable of producing bunches with a linearly ramped current profile. This "ramped" electron bunch is predicted to be an ideal drive beam for generating large-amplitude wake-fields in the plasma wake-field accelerator (PWFA). The experimental plan for measuring the degree of compression and for observing the ramped bunch profile includes the use of Coherent Transition Radiation (CTR) Interferometry as well as the construction and implementation of a Dipole Mode Deflecting Cavity which will permit temporal resolution of the beam's structure at the 50-100 fs level. For more information, please choose from the topic links on the left or click on the images to the right.

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