Reducing the longitudinal emittance of the 8-GeV beam via the rf manipulation in a booster cycle

Yang, Xi ; Lebedev, Valeri A. ; Ankenbrandt, Charles M. ; /Fermilab

Fermi National Accelerator Laboratory

关键词: Accelerators;    43 Particle Accelerators;    Accelerators Accelerators;    Rotation;    Simulation;   

DOI  :  10.2172/15020249
RP-ID  :  FERMILAB-FN-0770-AD
RP-ID  :  AC02-76CH03000
RP-ID  :  15020249

美国|英语

来源: UNT Digital Library

【 摘 要 】

Bunch rotation will cause the longitudinal emittance growth whenever there are far more A rf stations than B rf stations, or vice versa. An alternate method via optimizing the RFSUM curve in a Booster cycle has been investigated using the ESME simulation. Since the rf manipulation at transition crossing can reduce the longitudinal emittance 31% and the momentum spread 17%, eventually, the rms momentum spread of 2.98 MeV and the longitudinal emittance of 0.061 eV {center_dot} sec with 95% of the beam can be achieved at 8-GeV.