Narrow bandwidth and high voltage radio frequency (RF) is an essential requirement for stable confinement of ions within a RF trap and helical resonators are commonly used for that purpose. Effective capacitance and inductance of a helical resonator are estimated by measuring resonant frequencies for different external loads. Load capacitance of an ion trap can be estimated from this method and a resonator can be constructed for desired resonant frequency. We demonstrate a very simple method to achieve higher Q-factor of a resonator by optimizing mutual separation between the primary antenna and helical coil. We also formulate a set of analytical equations for calculating overall inductance, resistance, and Q-factor of a loaded helical resonator.
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May 07 2015
Note: Measuring capacitance and inductance of a helical resonator and improving its quality factor by mutual inductance alteration
S. Panja
;
S. Panja
a)
Time and Frequency Division,
CSIR-National Physical Laboratory
, New Delhi 110012, India
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S. De;
S. De
Time and Frequency Division,
CSIR-National Physical Laboratory
, New Delhi 110012, India
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S. Yadav;
S. Yadav
Time and Frequency Division,
CSIR-National Physical Laboratory
, New Delhi 110012, India
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A. Sen Gupta
A. Sen Gupta
Time and Frequency Division,
CSIR-National Physical Laboratory
, New Delhi 110012, India
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Time and Frequency Division,
CSIR-National Physical Laboratory
, New Delhi 110012, India
a)
Electronic mail: [email protected]
Rev. Sci. Instrum. 86, 056104 (2015)
Article history
Received:
October 29 2014
Accepted:
April 27 2015
Citation
S. Panja, S. De, S. Yadav, A. Sen Gupta; Note: Measuring capacitance and inductance of a helical resonator and improving its quality factor by mutual inductance alteration. Rev. Sci. Instrum. 1 May 2015; 86 (5): 056104. https://doi.org/10.1063/1.4919910
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