S1-Global is a collaborative effort of INFN, DESY, FNAL, SLAC and KEK, in the framework of the ILC global collaboration. For this project two cryomodules, 6 meter long and hosting four SC cavities each, were realized and successfully cold tested at KEK-STF. Three different cavity tuning systems, provided with fast tuning capability through piezoelectric actuators (piezo), were installed, and fully characterized in static and dynamic operation: Blade Tuner from INFN/FNAL, Saclay Tuner from DESY, Slide Jack Tuner from KEK. Finally, Lorenz Force Detuning (LFD) active compensation has been successfully achieved during high power cavity tests in pulsed RF regime, where active control of the LFD disturbance up to Hz-level residual detuning has been achieved with each type of tuning system up to the maximum gradient of each cavity. The installation procedures, together with the relevant results and their analyses are summarized in the paper.
|Titolo:||Tuner performance in the S1-Global cryomodule|
PAGANI, CARLO (Primo)
|Parole Chiave:||active compensation ; active control ; cavity tuning ; dynamic operations ; global collaboration ; installation procedures ; Lorenz forces ; tuning system ; particle accelerators ; piezoelectric actuators ; two term control systems ; tuners|
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
|Data di pubblicazione:||set-2011|
|Tipologia:||Book Part (author)|
|Appare nelle tipologie:||03 - Contributo in volume|