Title :
Simulation of PEP-II beam position monitors
Author :
Ng, C.K. ; Weiland, T. ; Martin, D. ; Smith, S. ; Kurita, N.
Author_Institution :
Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
We use MAFIA to analyze the PEP-II button-type beam position monitors (BPMs). Employing proper termination of the BPM into a coaxial cable, the output signal at the BPM can be determined. Thus the issues of sensitivity and power output can be addressed quantitatively, including all transient effects and wakefields. Besides this first quantitative analysis of a true BPM 3D structure, we find that internal resonant modes are a major source of high value narrow-band impedances. These are evaluated and methods are presented to suppress these parasitic resonances below the tolerable limit of multibunch instabilities
Keywords :
beam handling techniques; electron accelerators; high energy physics instrumentation computing; particle beam diagnostics; particle beam stability; storage rings; 3D structure; MAFIA code; PEP-II beam position monitors simulation; button-type beam position monitors; coaxial cable; high value narrow-band impedances; internal resonant modes; multibunch instabilities; output signal; parasitic resonances suppression; power output; sensitivity; transient effects; wakefields; Beams; Coaxial components; Damping; Electromagnetic waveguides; Fourier transforms; Frequency; Impedance; Narrowband; Resonance; Vacuum arcs;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505592
