Electron cloud and space charge effects in the Fermilab Booster

Ng, K. Y.

Fermi National Accelerator Laboratory

关键词: Origin;    Clouds;    Secondary Emission;    43 Particle Accelerators;    Buildup;   

DOI  :  10.2172/917873
RP-ID  :  FERMILAB-FN-0803-AD
RP-ID  :  AC02-07CH11359
RP-ID  :  917873

美国|英语

来源: UNT Digital Library

【 摘 要 】

The stable region of the Fermilab Booster beam in the complex coherent-tune-shift plane appears to have been shifted far away from the origin by its intense space charge making Landau damping appear impossible. Simulations reveal a substantial buildup of electron cloud in the whole Booster ramping cycle, both inside the unshielded combined-function magnets and the beam pipes joining the magnets, whenever the secondary-emission yield (SEY) is larger than {approx}1.6. The implication of the electron-cloud effects on the space charge and collective instabilities of the beam is investigated.