Ohm, N.; Dürr, V.; Glöckner, F.; Knobloch, J.; Pflocksch, F.; Schemmel, K.; Velez Saiz, A.; Wiese, S.; Wunderer, N.: Strain gauge-based position monitoring of SRF cavity. 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. THP43/691-695
10.18429/JACoW-SRF2025-THP43
Open Accesn Version
Abstract:
The variable pulse-length storage ring (VSR) cavities, featuring protruding waveguides and higher order modes (HOM) absorbers, are designed to be installed as part of the cold string in a spaceframe within a cryogenic vessel. Precise alignment of the cavities during installation and continuous position monitoring during operation are re-quired to prevent damage of other cold string components such as bellows. To achieve this, strain gauges are installed on the rods suspending the cavity within the spaceframe, measuring the superimposed strains. To validate this approach, assembly tests were con-ducted, comparing strain gauge measurements with laser tracker data. The results demonstrate that strain gauge-based monitoring enables continuous position tracking of the cavity. Operation within a vacuum vessel at low tem-perature still needs to be tested.