A design of resonant cavity with an improved coupling-adjusting mechanism for the W-band EPR spectrometer  

作　　者：Yu He Runqi Kang Zhifu Shi Xing Rong Jiangfeng Du 贺羽;康润琪;石致富;荣星;杜江峰(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)

机构地区：[1]CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]Chinainstru&Quantumtech(Hefei)Co.,Ltd,Hefei 230031,China

出　　处：《Chinese Physics B》2022年第11期115-120,共6页中国物理B（英文版）

基　　金：Project supported by the Chinese Academy of Sciences(Grant Nos.XDC07000000 and GJJSTD20200001);the Youth Innovation Promotion Association of Chinese Academy of Sciences for the support。

摘　　要：We report a new design of resonant cavity for a W-band electron paramagnetic resonance(EPR)spectrometer.An improved 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 TE_(011) geometry also makes the cavity compatible with the two frequently used types of magnets.The coupling-varying ability has been demonstrated by reflection coefficient(S_(11))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.

关 键 词：electron paramagnetic resonance W-BAND microwave cavity coupling coefficient 

分 类 号：O482.533[理学—固体物理]