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METHOD FOR READING OUT MAGNETIC FIELDS WITH A i DC /i SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE ( i DC /i -SQUID) AND CORRESPONDING DEVICE
METHOD FOR READING OUT MAGNETIC FIELDS WITH A i DC /i SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE ( i DC /i -SQUID) AND CORRESPONDING DEVICE
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机译:用i DC / i超导量子干扰装置(i DC / i-SQUID)和对应装置读出磁场的方法
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摘要
The inventive method for operating a dc SQUID (A) with a parallel-connected coupling transformer (B) comprises a step, wherein a non-constant ac bias current (Ib) is supplied. Said supplied non-constant ac bias current compensates the current (Ic) induced by the transformer in such a way that the current flowing through the SQUID has a periodic rectangular function. This makes it possible to advantageously achieve low-noise operation of up to high reversal frequencies of over 100 kHz.
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