원문정보
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초록
영어
Radio-frequency (RF) amplifiers based on direct current (DC) superconducting quantum interference device (SQUID) have low-noise performance for precision physics experiments. Gain curves of SQUID RF amplifiers depend on several parameters of the SQUID and operation conditions. We are developing SQUID RF amplifiers for application to measure very weak RF signals from ultra-low-temperature high-magnetic-field microwave cavity in axion search experiments. In this study, we designed, fabricated and characterized SQUID RF amplifiers with different SQUID parameters, such as number of input coil turn, shunt resistance value of the junction and coupling capacitance in the input coil, and compared the results.
목차
Abstract
1. INTRODUCTION
2. FABRICATION OF SQUID RF AMPLIFIERS
2.1. Design of SQUID RF amplifiers
2.2. Fabrication of SQUID RF amplifiers
3. CHARACTERIZATION OF RF AMPLIFIERS
3.1. Current-voltage curves of SQUID RF amplifiers
3.2. Gain curve of SQUID RF amplifiers
3.3. Dependence on the input RF power level
3.4. Dependence on the number of input coil turn
3.5. Dependence on the shunt resistance
3.6. Dependence on the coupling capacitance
5. CONCLUSIONS
ACKNOWLEDGMENT
REFERENCES
1. INTRODUCTION
2. FABRICATION OF SQUID RF AMPLIFIERS
2.1. Design of SQUID RF amplifiers
2.2. Fabrication of SQUID RF amplifiers
3. CHARACTERIZATION OF RF AMPLIFIERS
3.1. Current-voltage curves of SQUID RF amplifiers
3.2. Gain curve of SQUID RF amplifiers
3.3. Dependence on the input RF power level
3.4. Dependence on the number of input coil turn
3.5. Dependence on the shunt resistance
3.6. Dependence on the coupling capacitance
5. CONCLUSIONS
ACKNOWLEDGMENT
REFERENCES
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