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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 4: RF, Resonators and Applications II
AKBP 4.1: Talk
Monday, March 14, 2016, 16:30–16:45, S1/05 24
Recommissioning of the High-Temperature UHV-Furnace at the S-DALINAC for Research on Future RF Cavitiy Materials* — •Ruben Grewe1, Jens Conrad1, Thorsten Kürzeder1, Norbert Pietralla1, Lambert Alff2, Marton Major2, and Florian Hug3 — 1Institut für Kernphysik, TU Darmstadt, Darmstadt, Germany — 2Materialwissenschaft, TU Darmstadt, Darmstadt, Germany — 3Institut für Kernphysik, JGU Mainz, Mainz, Germany
Current research shows an up to four times higher Q-factor for nitrogen doped superconducting niobium cavities. Those cavities are usually heat processed in an uhv-furnace with temperatures around 800∘C and a short time exposed to a nitrogen atmosphere. The uhv-furnace at the S-DALINAC is able to reach temperatures of up to 1800∘C, which offers the possibility of making N-doped niobium samples at temperatures between 1300∘C and 1700∘C. At these temperatures the so-called δ-phase of NbN forms, which is highly interesting for superconducting accelerator usage. In order to produce such samples for research on δ-phase NbN, the uhv-furnace needs technical upgrades. These include enhanced vacuum systems, temperature monitoring and residual gas analysis as well as a new, smaller niobium hot-pot for heat processing of niobium samples. In this talk first results of the furnace recommissioning will be presented. An outlook on future activities will be given.
*Work supported by BMBF through 05H15RDRBA.