Solving the problem of heating of RF contacts in cavity tuners

Author

Senichev, Yu. ; Korsbjerg, T. ; Moller, S.P. ; Zaplatine, E.N.

Author_Institution

Aarhus Univ., Denmark

Volume

3

fYear

1997

fDate

12-16 May 1997

Firstpage

2923

Abstract

The accelerating cavity of the ASTRID Electron Synchrotron was studied. The cavity is a capacity loaded TEM cavity resonating at 104.95 MHz. Two plungers driven in parallel keep the cavity in tune, yielding a tuning range of about 0.8 MHz to compensate the beam loading. The RF spring contact liners placed on the entrance of the plunger housing are used to isolate the plunger housing from the RF field. The surface current flowing through the contacts limits the power in the cavity to less than 5 kW due to heating. We analyse the electrodynamics of the tuner and investigate two options of a new tuner geometry, one with contacts and one without contacts. The new design should remove the power limitation due to contact problems

Keywords

accelerator cavities; electrodynamics; electron accelerators; synchrotrons; 104.95 MHz; ASTRID Electron Synchrotron; RF contacts; RF spring contact liners; accelerating cavity; beam loading; capacity loaded TEM cavity; cavity tuners; contact problems; electrodynamics; plunger housing; power limitation; surface current; tuning range; Acceleration; Coaxial components; Contacts; Electrodynamics; Electromagnetic fields; Heating; Magnetic fields; Radio frequency; Surface resistance; Tuners;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.753062

Filename

753062