Dortmund 2021 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 5: Radiofrequency and Miscellaneous
AKBP 5.5: Vortrag
Dienstag, 16. März 2021, 17:30–17:45, AKBPb
Status of the deflecting cavity development as a beam separator for ELBE — •Gowrishankar Hallilingaiah1, Andre Arnold2, Peter Michel1,2, and Ursula van Rienen1,3 — 1University of Rostock, Rostock — 2Helmholtz-Zentrum Dresden-Rossendorf, Dresden — 3Department of Life, Light and Matter, University of Rostock
The current beamline setup at ELBE tends to a single user experiment at any given time. Further, not all the user experiments utilize the full 13 MHz CW beam capacity. Therefore beam separator is being developed to maximize the beam usage which would distribute the beam simultaneously to different user experiments. A review of deflecting structure designs which can be adapted as a beam separator was carried out. Consequently, radiofrequency cavity was chosen, as they produce stable deflection at MHz range. Subsequently, a comparative study was carried out on the potential deflecting cavity designs, and in-turn, a new normal conducting double quarter wave cavity design was selected. Furthermore, fundamental power coupler and frequency tuners were designed. Finally, multiphysics simulations were carried out to aid in cavity fabrication, ascertain the adequacy of cooling, and to estimate the frequency drift during operation. Subsequently, the copper cavity parts were machined and the frequency pre-tuning was performed before the final vacuum brazing. To verify the field profile and figure of merit, bead-pull experiment was performed. Currently, high power testing is under progress. This research work is funded by Helmholtz-Zentrum Dresden-Rossendorf under the project TRACE.