Sharples-Milne, E.; Vélez, A.; Wunderer, N.; Echevarria, P.; Neumann, A.; Dürr, V.; Knobloch, J.: Initial conditioning of the 1.5 GHz prototype couplers for VSR demo. In: Lin Bian (IHEP) ... [Ed.] : Proceedings of the 22nd International Conference on RF Superconductivity : SRF2025 : Tokyo, RIKEN Nishina Center in Wako, Japan from 21–26 September, 2025Geneve: JACoW, 2025. - ISBN 978-3-95450-256-1, p. MOP60/209-214
10.18429/JACoW-SRF2025-MOP60
Open Access Version
Abstract:
Two prototype 1.5 GHz fundamental power couplers for the VSR (Variable pulse length Storage Ring) DEMO project at Helmholtz Zentrum Berlin (HZB) were produced by Research Instruments (RI) and Thales, with the aim of reaching 16 kW continuous wave (CW). To allow for conditioning of the couplers, a dedicated coupler test stand was designed, installed, and commissioned. The couplers were delivered March 2023 after substantial reworking; however, due to a vacuum leak during mounting, further reworking was required and were installed on the test stand June 2024. Such levels of rework dictated a more cautious testing plan. After a 120 C baking, an initial short conditioning run was performed in August 2024, followed by a longer run from April to May 2025. Here, we present the first conditioning results.