Title :
RF cavity BPM´S as beam angle and beam correlation monitors
Author :
Ross, Marc ; Frisch, Josef ; Mccormick, Douglas ; Hayano, Hitoshi
Author_Institution :
Stanford Linear Accelerator Center, CA, USA
Abstract :
It has been shown that high performance cavity BPM´s are capable of accurate beam trajectory angle and beam ´tilt´, (x-z or y-z correlation) measurements. Such a device will be very useful for the optimization of a variety of beamlines, such as high current linacs, bunch rotators and storage rings. The signal from a nonaxial trajectory or a tilted beam is in quadrature to that observed from a simple displacement of a very short bunch. Using in-phase/quadrature-phase (I/Q) demodulation of the cavity BPM signal, it is possible to separate position and angle/tilt. In this paper, we present results of beam angle and tilt monitor tests carried out in the KEK Accelerator Test Facility (ATF) extraction line.
Keywords :
accelerator RF systems; accelerator cavities; electron accelerators; linear accelerators; particle beam bunching; particle beam diagnostics; particle beam dynamics; KEK Accelerator Test Facility extraction line; RF cavity; accurate beam trajectory angle; beam tilt; bunch rotators; high current linacs; high performance cavity beam position monitor; in-phase demodulation; nonaxial trajectory; quadrature-phase; storage rings; x-z correlation; y-z correlation; Demodulation; Equations; Life estimation; Linear accelerators; Radio frequency; Radiofrequency amplifiers; Signal generators; Storage rings; Test facilities; Voltage;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1289183
