Köln 2004 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 25: Instrumentation and Applications III
HK 25.7: Talk
Wednesday, March 10, 2004, 12:30–12:45, C
Development of finger drift tubes — •Kai-Uwe Kuehnel1, Carsten Peter Welsch2, and Alwin Schempp1 — 1IAP Frankfurt — 2MPI-K Heidelberg
Since RFQs decrease in their acceleration efficiency at higher energies and drift tube structures have a defocussing effect on the beam, a new kind of drift tube linac is being studied in Frankfurt. By mounting small fingers with quadrupole symmetry on the drift tubes, a focusing field component is added to the accelerating field. Driven by the same power supply as the drift tubes, the fingers do not need an additional power source or feedthrough. The beam dynamics of such a cavity has been examined with PARMTEQ. Simulations of the rf properties have been done using microwave studio. A prototype of a spiral loaded cavity with finger drift tubes has been built and examined. Results of the calculations as well as low level and bead pertubation measurements are presented in this contribution.