Study of a low impedance beam position monitor for short bunches

Author

Alesini, D. ; Spataro, B. ; Vaccarezza, C. ; D´Alessio, C. ; Mostacci, A. ; Palumbo, L.

Author_Institution

Ist. Nazionale di Fisica Nucl., Frascati, Italy

Volume

4

fYear

2003

fDate

12-16 May 2003

Firstpage

2500

Abstract

A low coupling impedance beam position monitor based on microwave spectroscopy is proposed. A coaxial cavity is coupled to a circular beam pipe through four small longitudinal slots. Displaced beams excite TE cavity modes that can be detected by two antennas. Applying the modified Bethe´s theory, the TE₁₁₁ mode power has been derived as a function of the beam displacement. An aluminium prototype has been constructed with the support of numerical (HFSS) simulations. Bench measurements using a coaxial wire excitation show good agreement with both theoretical and numerical expectations.

Keywords

accelerator cavities; beam handling techniques; numerical analysis; particle beam bunching; particle beam diagnostics; Bethes theory; TE cavity modes; aluminium prototype; beam displacement; beams excitation; circular beam pipe; coaxial cavity; coaxial wire excitation; longitudinal slots; low coupling impedance beam position monitor; microwave spectroscopy; numerical simulations; Aluminum; Antenna measurements; Coaxial components; Electrochemical impedance spectroscopy; Monitoring; Numerical simulation; Optical coupling; Tellurium; Virtual prototyping; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289167

Filename

1289167