Electromagnetic design of the RF cavity beam position monitor for the LCLS

Author

Waldschmidt, G. ; Lill, R. ; Morrison, L.

Author_Institution

ANL, Argonne

fYear

2007

fDate

25-29 June 2007

Firstpage

1153

Lastpage

1155

Abstract

A high-resolution X-band cavity BPM has been developed for the LCLS. A dipole mode cavity and a monopole mode reference cavity have been designed in order to achieve micron-level accuracy of the beam position. The rf properties of the BPM as well as beam interaction with the cavities will be discussed including output power and tuning. In addition, methods will be presented for improving the isolation of the output ports to differentiate between horizontal / vertical beam motion and to reject extraneous modes from affecting the output signal. The predicted simulation results will be compared to data collected from low-power experimental tests.

Keywords

accelerator RF systems; accelerator cavities; linear accelerators; particle beam diagnostics; wakefield accelerators; LCLS; RF cavity beam position monitor; Wakefield simulations; beam interaction; dipole mode cavity; electromagnetic design; high-resolution X-band cavity; horizontal beam motion; micron-level accuracy; monopole mode reference cavity; output ports; output tuning; vertical beam motion; Beams; Charge measurement; Contamination; Current measurement; Magnetic resonance; Monitoring; Pollution measurement; Radio frequency; Signal resolution; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4441013

Filename

4441013