Slow-wave chopper structures for next generation high power proton drivers

Author

Clarke-Gayther, Michael A.

Author_Institution

STFC, Didcot

fYear

2007

fDate

25-29 June 2007

Firstpage

1637

Lastpage

1639

Abstract

A description is given of slow-wave chopper structures for the 3.0 MeV, 60 mA, H^- MEBT lines of the CERN Linac 4 and RAL Front-End Test Stand (FETS). Transmission line properties and transverse E-field uniformities for the original European spallation source (ESS) designs [1] have been refined by modelling electromagnetic fields in a commercial 3D finite difference time domain (FDTD) code [2]. In addition, the original compact, radiation hard, vacuum compatible designs have been simplified and reconfigured to be compatible with standard NC machining practice. Transmission line properties in the frequency and time domain, together with E-field uniformity in the axial and transverse planes, are presented.

Keywords

beam choppers; electromagnetic fields; finite difference time-domain analysis; linear accelerators; neutron sources; particle beam bunching; particle beam injection; proton accelerators; storage rings; synchrotrons; transmission lines; CERN Linac 4; E-field uniformity; European Spallation Source designs; MEBT lines; RAL Front-End Test Stand; axial plane; commercial 3D finite difference time domain code; electromagnetic fields; frequency domain; neutron source; ring injection; slow-wave chopper structures; time domain; transmission line properties; transverse E-field uniformities; transverse plane; vacuum compatible designs; Choppers; Electromagnetic fields; Electromagnetic modeling; Electronic switching systems; FETs; Finite difference methods; Linear particle accelerator; Power transmission lines; Protons; Testing;

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.2007.4440848

Filename

4440848