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RIS citation export for WEPCAV012: Research and Development of 650 MHz Cavities for CEPC

AU  - Sha, P.
AU  - Dong, C.
AU  - He, F.S.
AU  - Jin, S.
AU  - Li, Z.Q.
AU  - Liu, B.Q.
AU  - Mi, Z.H.
AU  - Pan, W.M.
AU  - Zhai, J.Y.
AU  - Zhang, X.Y.
AU  - Zheng, H.J.
ED  - Saito, Kenji
ED  - Xu, Ting
ED  - Sakamoto, Naruhiko
ED  - Lesage, Ana
ED  - Schaa, Volker R.W.
TI  - Research and Development of 650 MHz Cavities for CEPC
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  - 650 MHz 2-cell superconducting cavities are proposed for the main ring of the Circular Electron Positron Collider (CEPC). The design, fabrication, surface treatment (buffered chemical polishing) and vertical tests of the cavities with HOM couplers were conducted. The performance of the cavity at 2 K is not affected by the HOM coupler. The maximum intrinsic quality factor of the cavity with the HOM coupler reached 3.1·10¹⁰ at 20 MV/m. The vertical test results showed that the fundamental mode external quality factor of all HOM couplers is an order of magnitude larger than quality factor of the cavity. The HOM damping results for the 650 MHz 2-cell cavity were also measured at cryogenic temperature and compared with the simulated and measured results at room temperature. Two 650 MHz 2-cell cavities jacketed have been integrated into a test cryomodule for CEPC. Another 650 MHz 2-cell cavity reached 6·10¹⁰ at 22 MV/m after nitrogen infusion. In addition, two 650 MHz 1-cell cavities reached 2.7·10¹⁰ at 35 MV/m (fine grain) and 3.6·10¹⁰ at 32 MV/m (large grain) after electro-polishing, respectively. In future, electro-polishing will be applied to 650 MHz 2-cell cavity soon.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 616
EP  - 618
KW  - cavity
KW  - cryomodule
KW  - superconducting-cavity
DA  - 2022/10
PY  - 2022
SN  - 2673-5504
SN  - 978-3-95450-233-2
DO  - doi:10.18429/JACoW-SRF2021-WEPCAV012
UR  - https://jacow.org/srf2021/papers/wepcav012.pdf
ER  -