Experimental Research on High Gradient Acceleration by Wakefields in an Elliptic Cavity at the UTA Wake Field Test Facility.

摘要

The main goals of the successful research program are to provide theoretical basis to analyze the wake-fields in the elliptically shaped wake-field cavity, and to examine the feasibility of applying the new idea of wake-field acceleration to beams of lasers. The theorectical research is very important due to the world-wide interest in finding new acceleration principles with higher accelerating gradients suitable for future particle accelerators. In particular, very exciting and new experimental results indicated that wake field acceleration is indeed a very viable alternative for this endeavor. The research is divided into six categories: (1) Investigation of wake-field acceleration using the elliptical wake-field cavity, (2) Theoretical study of dielectric wake field cavity, (3) Computer code development for a wake field cavity analysis, (4) Development of wake field measurement system, (5) Application of wake field cavities: study of a soft x ray laser scheme, and (6) Development of a laser photocathode. The design and construction of a laser photocathode was conducted for a use as an intense, short electron beam source for the wake field acceleration study. Numerical study of optimal cathode geometry was conducted and beam currents were measured. It was demonstrated that this type of photoemitter can be used as an efficient short, intense electron beam source for a compact linac design.(jhd)