Experience of developing highly reliable Tuner components (piezo actuators and cold stepper motor actuators) for SRF Linac

Conference · Fri May 30 04:00:00 EDT 2025 · No journal information

DOI:https://doi.org/10.2172/2568550· OSTI ID:2568550

Pischalnikov, Yuriy ^[1]; Contreras Martinez, Crispin ^[1]

---

1. Fermilab

The resonance control team at FNAL has led the design of the LCLS-II SRF Linac SRF cavity tuner subsystem. The Linac is expected to operate for over 30 years, and the longevity of the tuner is crucial to the overall reliability of the Linac. When the tuner's design was started, there were no active actuators (stepper and piezo) that could meet the longevity requirements of the Linac. The FNAL resonance control team, in collaboration with industrial partners (Phytron and PI), has developed actuators that have been shown to withstand a cryogenic and insulating vacuum environment for over 100 years in accelerated lifetime tests. Details of actuators design and longevity testing will be presented. Now, practically all (small and large) SRF systems that are under construction around the world are using actuators developed at FNAL. A review of possible actuators improvement will be presented.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: 89243024CSC000002
• OSTI ID: 2568550
• Report Number(s): FERMILAB-SLIDES-25-0072-TD; oai:inspirehep.net:2926833
• Conference Information: Journal Name: No journal information
• Country of Publication: United States
• Language: English