Theoretical Study for a Resonator-type Laser-driven Particle Accelerator with Electron Transmitting Holes

• Main Authors: Huang-Min Chen, 陳皇銘
• Other Authors: Yen-Chieh Huang
• Format: Others
• Language: en_US
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/50739222398885622379

碩士 === 國立清華大學 === 原子科學系 === 88 === This thesis aims to study high order Hermite-Gaussian optical modes in a resonator for accelerating charged particles. The adequate accelerating mode inside a cavity is . The mode resembles the wave in the radio-frequency accelerator. Hence, the laser-accelerating structure is assumed herein to be similar to a microwave accelerator structure. The laser acceleration cavity is formed by two symmetrical confocal mirrors with electron apertures. The transverse component of mode is zero on the axis and the longitudinal field is used to drive the particle. The longitudinal field is proportional to the gradient of the transverse field under the paraxial approximation. In this investigation, finding of the mode selection rule to prevent unwanted higher order modes inside the cavity is highly desired. The acceleration mode contains significant optical power, exceeding 99% of the total cavity power. Given the laser damage fluence on optical components, the acceleration gradient is approximately ten when the cavity length is roughly one centimeter.