Speakers
Anne-Marie Valente-Feliciano
Grigory Eremeev
(Fermilab)
Uttar Pudasaini
(The College of William and Mary)
Description
We will present on the evolution of Nb3Sn-coated accelerator cavity performance from the qualification test to the test in CEBAF cryomodule. Two Nb3Sn-coated 5-cell accelerator cavities were first measured at 4 K and 2 K in the vertical dewar test, then assembled into a CEBAF quarter cryomodule. Several precautions were taken and changes were implemented in the assembly procedures to preserve the performance of the cavities. In the cryomodule we measured one cavity up to Eacc = 7.5 MV/m and the other cavity up to 13 MV/m at 4 K. We will discuss the challenges of preserving RF properties of coated cavities and opportunities of this approach for the future.
