Title :
RHIC beam components impedance analysis with MAFIA
Author :
Wang, H. ; Guryn, W. ; Huang, H. ; Trbojevic, D.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
The RHIC CNI polarimeter chambers and Roman Pots of the PP2PP detector have been simulated by a 3D electromagnetic field code MAFIA to calculate the narrowband shunt impedance and the beam parasitic loss in the frequency domain. The field profiles in high order modes (HOMs) of the polarimeter were then confirmed by bead-pull measurement. With an optimum design, the shunt impedances for both components are under the limits set by the coupled bunch instability consideration
Keywords :
accelerator cavities; high energy physics instrumentation computing; particle beam bunching; particle beam diagnostics; particle beam stability; proton accelerators; proton beams; storage rings; synchrotrons; 3D electromagnetic field code; CNI polarimeter chambers; HOM; MAFIA code; PP2PP detector; RHIC; Roman Pots; bead-pull measurement; beam component impedance analysis; beam parasitic loss; coupled bunch instability; field profiles; frequency domain; high order modes; injection cavities; long-range wakefield; narrowband shunt impedance; proton beam circulation; short bunch; storage cavities; Assembly; Electromagnetic fields; Electromagnetic measurements; Frequency domain analysis; Guidelines; Impedance; Independent component analysis; Narrowband; Optical coupling; Particle beams;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987198
