| Title |
Redesign of the End Group in the 3.9 GHz LCLS-II Cavity |
| Authors |
- A. Lunin, I.V. Gonin, T.N. Khabiboulline, N. Solyak
Fermilab, Batavia, Illinois, USA
|
| Abstract |
Development and production of Linac Coherent Light Source II (LCLS-II) is underway. The central part of LCLS-II is a continuous wave superconducting RF (CW SCRF) electron linac. The 3.9 GHz third harmonic cavity similar to the XFEL design will be used in LCLS-II for linearizing the longitudinal beam profile*. The initial design of the 3.9 GHz cavity developed for XFEL project has a large, 40 mm, beam pipe aperture for better higher-order mode (HOM) damping. It is resulted in dipole HOMs with frequencies nearby the operating mode, which causes difficulties with HOM coupler notch filter tuning. The CW linac operation requires an extra caution in the design of the HOM coupler in order to prevent its possible overheating. In this paper we present the modified 3.9 GHz cavity End Group for meeting the LCLS-II requirements
|
| Footnotes & References |
* LCLS-II 3.9 GHz Cryomodules, Physics Requirements Document, LCLSII-4.1-PR-0097-R1, SLAC, USA, 2015 |
| Funding |
Operated by Fermi Research Alliance, LLC, under Contract DE-AC02-07CH11359 with the U.S. DOE |
| Paper |
download MOPLR007.PDF [1.436 MB / 4 pages] |
| Poster |
download MOPLR007_POSTER.PDF [1.590 MB] |
| Export |
download ※ BibTeX
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※ EndNote |
| Conference |
LINAC2016, East Lansing, MI, USA |
| Series |
Linear Accelerator Conference (28th) |
| Proceedings |
Link to full LINAC2016 Proccedings |
| Session |
Poster Session |
| Date |
26-Sep-16 16:00–17:00 |
| Main Classification |
1 Electron Accelerators and Applications |
| Sub Classification |
1A Electron Linac Projects |
| Keywords |
HOM, cavity, dipole, linac, operation |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Yoshishige Yamazaki (FRIB/MSU, East Lansing, MI, USA); Alberto Facco (FRIB/MSU, East Lansing, MI, USA); Amy McCausey (FRIB/MSU, East Lansing, MI, USA); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-169-4 |
| Published |
May 2017 |
| Copyright |
|
