JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Wunderer, N. AU - Bonezzi, M. AU - D’Ambros, A. AU - Dürr, V. AU - Frahm, A. AU - Glock, H.-W. AU - Glöckner, F. AU - Guo, J. AU - Henry, J. AU - Knobloch, J. AU - Paparella, R. AU - Rimmer, R.A. AU - Sharples-Milne, E. AU - Tsakanian, A.V. AU - Veléz, A. ED - Saito, Kenji ED - Xu, Ting ED - Sakamoto, Naruhiko ED - Lesage, Ana ED - Schaa, Volker R.W. TI - VSR Demo Cold String: Recent Developments and Manufacturing Status J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021 CY - East Lansing, MI, USA T2 - International Conference on RF Superconductivity T3 - 20 LA - english AB - The BESSY VSR project aims to demonstrate the possibility to simultaneously run both long (15ps) and short bunches (1.7ps) within BESSY II storage ring. To achieve this, a new SRF cavity system with higher harmonic cavities (3 and 3.5 harm.) needs to be installed. The combined cavity SRF beating allows for stable bunch shortening for half of the buckets while standard lengths remaining for the other half. These SRF cavities will be equipped with waveguide-connected HOM absorbers and will be controlled with a blade tuner plus piezos. To demonstrate the feasibility of this complex system the VSR DEMO cold string consists of two 1.5 GHz cavities, each featuring five waveguides and a higher power coupler, plus all interconnecting elements coupled to the beam vacuum. For most of these components the fundamental development work is completed and has been reported in the past. This paper summarizes recent enhancements, component detailing and manufacturing status. The key cold string components such as cavities, higher power couplers and blade tuners have already entered the manufacturing phase. All other cold string components will be ready for purchase at the latest beginning of 2022. PB - JACoW Publishing CP - Geneva, Switzerland SP - 647 EP - 651 KW - cavity KW - HOM KW - SRF KW - operation KW - GUI DA - 2022/10 PY - 2022 SN - 2673-5504 SN - 978-3-95450-233-2 DO - doi:10.18429/JACoW-SRF2021-WEPTEV008 UR - https://jacow.org/srf2021/papers/weptev008.pdf ER -