Observationofhighcurrenteffects in Highenergylinearaccelerators

Introduction ............................................................... 2 Longitudinal Effects ...................................................... 2 2.1 Acceleration ...................................................... 2 2.2 Energy spread .................................................... 3 2.3 Multibunch longitudinal effects ................................. 5 Transverse Oscillations .................................................. 6 3.1 Equation of motion with transverse wakefields .............. 6 3.2 Transverse wakefield (BNS) damping ........................ 11 3.3 Analysis of oscillations ......................................... 15 3.4 Autophasing ...................................................... 15 3.5 Injection tolerance ............................................... 18 3.6 Transverse jitter .................................................. 18 Transverse Emittance Effects at High Currents ....................... 24 4.1 General emittance reduction techniques ....................... 24 4.2 Transverse profile changes with transverse wakefields ..... 26 4.3 Emittance observations .......................................... 29 4.4 Emittance minimization .......................................... 31 4.5 Emittance collimation ............................................ 33 4.6 Multibunch transverse effects .................................. 35 Acknowledgments ......................................................... 37 References .................................................................. 37