Frankfurt 2014 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 46: Poster

HK 46.41: Poster

Thursday, March 20, 2014, 16:00–18:00, HZ Poster

The Fast Piezo-Based Frequency Tuner for sc CH-Cavities — •Michael Amberg^{1, 2}, Kurt Aulenbacher¹, Winfried Barth¹, Marco Busch², Florian Dziuba², Holger Podlech², and Ulrich Ratzinger² — ¹Helmholtz-Institute Mainz (HIM), Mainz, Germany — ²IAP University of Frankfurt, Frankfurt am Main, Germany

Superconducting (sc) structures have to fulfill strict mechanical requirements to assure a stable operation of a cavity. Even small mechanical disturbances caused by effects like microphonic noise, pressure fluctuations of the liquid helium bath or Lorentz force detuning can change the resonance frequency of the cavity in the range of several hundred kHz. To control the slow and fast frequency variations during operation a compact frequency tuner prototype equipped with a stepper motor and a piezo actuator has been developed at the Institute for Applied Physics (IAP) of Frankfurt University. The tuner design and the results of first mechanical tests at room temperature of the first prototype are presented.