Coherent parasitic energy loss of the recycler beam

Ng, K.Y.

Fermi National Accelerator Laboratory

关键词: Cavities;    43 Particle Accelerators;    Particle Beams;    Harmonics;    Impedance;   

DOI  :  10.2172/825826
RP-ID  :  FERMILAB-TM-2249
RP-ID  :  AC02-76CH03000
RP-ID  :  825826

美国|英语

来源: UNT Digital Library

【 摘 要 】

Parasitic energy loss of the particle beam in the Recycler Ring is discussed. The long beam confined between two barrier waves has a spectrum that falls off rapidly with frequency. Discrete summation over the revolution harmonics must be made to obtain the correct energy loss per particle per turn, because only a few lower revolution harmonics of real part of the longitudinal impedance contribute to the parasitic energy loss. The longitudinal impedances of the broadband rf cavities, the broadband resistive-wall monitors, and the resistive wall of the vacuum chamber are discussed. They are the main sources of the parasitic energy loss.