We report a new design of resonant cavity for a W-band electron paramagnetic resonance(EPR)spectrometer.An im-proved coupling-adjusting mechanism,which is robust,compact,and suits with both solenoid-type and split-pair magnets,is utilized on the cavity,and thus enables both continuous-wave(CW)and pulsed EPR experiments.It is achieved by a tiny metal cylinder in the iris.The coupling coefficient can be varied from 0.2 to 17.9.Furthermore,two pistons at each end of the cavity allow for adjustment of the resonant frequency.A horizontal TE011 geometry also makes the cavity compatible with the two frequently used types of magnets.The coupling-varying ability has been demonstrated by reflection coefficient(S11)measurement.CW and pulsed EPR experiments have been conducted.The performance data indicates a prospect of wide applications of the cavity in fields of physics,chemistry and biology.

Yu He;Runqi Kang;Zhifu Shi;Xing Rong;Jiangfeng Du

CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Chinainstru&Quantumtech(Hefei)Co.,Ltd,Hefei 230031,China

中国物理B（英文版）

[1]Yu He;Runqi Kang;Zhifu Shi;Xing Rong;Jiangfeng Du-.A design of resonant cavity with an improved coupling-adjusting mechanism for the W-band EPR spectrometer)[J].中国物理B（英文版）,2022(11):129-134

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