The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Lipka, D. ED - Kim, Changbum ED - Schaa, Volker R. W. ED - Kim, Dong-Eon ED - Lee, Jaeyu TI - Design of a Cavity Beam Position Monitor for the FLASH 2020+ Undulator Intersection Project at DESY J2 - Proc. of IBIC2021, Pohang, Rep. of Korea, 24-28 May 2021 CY - Pohang, Rep. of Korea T2 - International Beam Instrumentation Conference T3 - 10 LA - english AB - The FLASH 1 beamline at DESY will be upgraded from fixed to variable gap undulators in the next years. For this the vacuum beamline has to be adapted. This reduces the inner diameter compared to the existing chamber. The vacuum components should fit to the new dimension to minimize transitions and therefore reduce wakefields which could interact with the electron beam and disturb the SASE effect. The electron beam position in the intersection of the undulators should be detected with a high resolution and a large charge dynamic range. Cavity BPMs are known to fulfill these requirements. The existing design with 10 mm inner diameter for the Eu-XFEL is reduced to 6 mm. Additional improvements are: widening of the dipole resonator waveguide to adapt to the dipole mode and antenna transmission. The resonator frequency of 3.3 GHz and loaded quality factor of 70 are maintained to use electronic synergies to other projects. The design considerations and simulation results of the cavity BPM will be presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 44 EP - 47 KW - dipole KW - cavity KW - FEL KW - resonance KW - electron DA - 2021/10 PY - 2021 SN - 2673-5350 SN - 978-3-95450-230-1 DO - doi:10.18429/JACoW-IBIC2021-MOPP08 UR - https://jacow.org/ibic2021/papers/mopp08.pdf ER -