The Study of Electromagnet Compensated High Power Ferrite Circulator Operation With Superconducting RF Cavity

Yu, Tsung-Chi; Chang, Fu-Yu; Chang, Lung-Hai; Chang, Mei-Hsia; Chen, Ling-Jhen; Chung, Fu-Tsai; Lin, Ming-Chyuan; Liu, Zong-Kai; Lo, Chih-Hung; Tsai, Chi Lin; Tsai, Ming-Hsun; Wang, Chaoen; Yeh, Meng-Shu

doi:10.18429/JACoW-IPAC2017-MOPVA099

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RIS citation export for MOPVA099: The Study of Electromagnet Compensated High Power Ferrite Circulator Operation With Superconducting RF Cavity

TY - CONF
AU - Yu, T.-C.
AU - Chang, F.Y.
AU - Chang, L.-H.
AU - Chang, M.H.
AU - Chen, L.J.
AU - Chung, F.-T.
AU - Lin, M.-C.
AU - Liu, Z.K.
AU - Lo, C.H.
AU - Tsai, C.L.
AU - Tsai, M.H.
AU - Wang, Ch.
AU - Yeh, M.-S.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - The Study of Electromagnet Compensated High Power Ferrite Circulator Operation With Superconducting RF Cavity
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - In a high power RF system for accelerator application, the circulator is very important for protecting klystron or IOT from damage due to high reflection power from the cavity. When there is no beam current passing through the superconducting RF cavity of the accelerator, almost 100% RF power will be reflected from the cavity even the cavity is on resonance. The circulator shall be able to forward the reflected power to the load and remain good matching and isolation condition between ports at klystron and the cavity. However, for a ferrite material based circulator, the magnetic field within circulator would be temperature dependent which would cause the variation of input return loss and isolation between ports. Additional DC current driving electromagnet field is thus re-quired for compensating the temperature variation. Even with the compensating DC current, the circulator is still not ideal for practical operation especially when the performance of the circulator is strongly phase dependent. The phenomenon observed in actual operation with one set of SRF systems in NSRRC is thus reported in this article.
PB - JACoW
CP - Geneva, Switzerland
SP - 1091
EP - 1093
KW - cavity
KW - SRF
KW - klystron
KW - operation
KW - vacuum
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-MOPVA099
UR - http://jacow.org/ipac2017/papers/mopva099.pdf
ER -