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Description
An ILC prototype cryomodule is presently being assembled at KEK, incorporating eight superconducting 1.3 GHz TESLA cavities. Accurate tuning and stable control of the resonance frequency of these narrow-bandwidth cavities, both prior to and during operation, require dedicated cavity tuners. The tuner concept is derived from the LCLS-II design. The specific requirements of the ILC prototype cryomodule, combined with the current market conditions, have necessitated an almost complete redesign. Owing to limited resources, full system-level validation prior to installation is not feasible. Therefore, targeted qualification tests of individual components are being performed. This contribution summarizes the current status of tuner development and production. Furthermore, two novel test approaches for the slow actuator (stepper motor with gearbox) and the fast actuator (piezo actuator) under cryogenic vacuum conditions are introduced, along with initial measurement results.
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