Validation of a narrowband signal processing system for beam position monitoring purposes in linear accelerators

Author

Ruf, Marcel ; Trummer, Stefan ; Schmidt, Lorenz-Peter ; Setzer, Stefan

Author_Institution

Dept. of Microwave Eng. & High Freq. Technol., Univ. of Erlangen-Nuremberg, Nuremberg, Germany

fYear

2010

fDate

15-17 March 2010

Firstpage

138

Lastpage

145

Abstract

A new RF frontend for a beam position monitoring system for electron linear accelerators (Linacs) is discussed. The frontend applies a waveguide based input filter section for processing the pulse train, generated by non-interceptive pickups and selection of the desired beam harmonic. Due to increased accuracy, narrowband signal processing was chosen for further signal treatment. Therefore, a two-channel downconverter was designed incorporating two single-balanced diode mixer stages optimized for processing frequencies around 6 GHz, the second beam harmonic in S-Band Linacs. Device characteristics and component validation in a demonstrator with electro-magnetic excitation, simulating beam-induced fields are presented.

Keywords

accelerator RF systems; beam handling techniques; electron accelerators; linear accelerators; particle beam diagnostics; signal processing; RF frontend; S-Band Linacs; beam harmonic selection; beam position monitoring; beam-induced fields; electromagnetic excitation; electron linear accelerators; narrowband signal processing system; noninterceptive pickups; pulse train processing; single-balanced diode mixer; two-channel downconverter; waveguide based input filter section; Diodes; Electron beams; Linear accelerators; Monitoring; Narrowband; Particle beams; Power harmonic filters; Pulse generation; Radio frequency; Signal processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2010 German

Conference_Location

Berlin

Print_ISBN

978-1-4244-4933-0

Electronic_ISBN

978-3-9812668-1-8

Type

conf

Filename

5498203