Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 83: RF / Instabilitäten

T 83.5: Talk

Tuesday, March 29, 2011, 17:45–18:00, 30.22: 020

Developement and initial operation of a 6 GHz subsystem for the RF control system of the S-DALINAC* — •Christoph Burandt, Uwe Bonnes, Ralf Eichhorn, Martin Konrad, Patrick Nonn, and Joachim Enders — Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany

During 2010 a source of polarized electrons has been installed at the S-DALINAC. Spatial constraints as well as limited cathode charge lifetime necessiate an efficient compression of the electron bunches before they enter the superconducting accelerating cavities. The new injector design therefore contains a harmonic prebunching system consisting of two cavities operated at 3 GHz and 6 GHz, respectively.

While 3 GHz components are at hand, 6 GHz components had to be developed and integrated into the new RF control system. The basic idea of the new digital control system is the down conversion of the RF signals to the base band. Therefore the low frequency part of each system can be used without adaptions, while the RF module required redevelopment.

This talk covers the redesign of the existing 3 GHz RF module for 6 GHz and first experiences from the commissioning of the new prebuncher system at the S-DALINAC.

*Supported by the BMBF under contract 06 DA 9024 I