II. Applications of the Josephson Effect
II. Applications of the Josephson Effect
II. Applications of the Josephson Effect
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R. Gross, A. Marx, and F. Deppe © Wal<strong>the</strong>r-Meißner-Institut (2001 - 2013)<br />
4.4 Instruments Based on SQUIDs<br />
• SQUIDs sense any signal that can be converted to flux<br />
• SQUID based instrument: antenna determines quantity to be measured:<br />
• input circuit influences signal and noise properties <strong>of</strong> SQUID<br />
• reduction <strong>of</strong> SQUID inductance<br />
® 2 : coupling coefficient<br />
mutual inductance:<br />
AS-Chap. 4 - 46