Dresden 2020 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: Radiofrequency

AKBP 2.3: Vortrag

Montag, 16. März 2020, 15:30–15:45, GÖR 226

A quadrupole resonator for SRF R&D — •Ricardo Monroy-Villa1,2, Wolfgang Hillert1,2, Detlef Reschke2, Jan-Hendrik Thie2, and Marc Wenskat11University of Hamburg, Hamburg, Germany — 2Deutsches Elektronen-Synchrotron, Hamburg, Germany

Radio frequency cavities used in particle accelerators and made from superconducting materials, i.e. niobium, have many advantages. In order to further improve their performance, a variety of different approaches can be applied and have to be investigated in detail. Instead of a rather complicated treatment of complex cavities samples of superconducting materials are studied to understand the material properties and their evolution under surface treatments, since they allow for an easier preparation and turn-around time at a lower cost. However, RF properties of superconducting samples, under the same conditions as SRF cavities, need to be studied as well to understand the influence of the material properties. A test cavity called quadrupole resonator (QPR) has been developed and operated at CERN and at Helmholtz Zentrum Berlin, which allows for testing samples under cavity conditions. In this work we report the status of such a test resonator developed and fabricated at Universität Hamburg and DESY. We present the results of a forensic study of the existing QPRs and how problems will be addressed in the new design. Fabrication tolerance studies on the electromagnetic field distributions, together with a status report on the current fabrication state, will be presented. In addition, the outline of two research projects using the QPR will be briefly addressed.

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