点接触2穴SQUIDの製作と調整
1978 年 13 巻 6 号 p. 297-302
詳細
1978 年 13 巻 6 号 p. 297-302
Practical techniques for making a two hole symmetric SQUID and for the adjustment of the point-contact weak link are described. The relation among the critical current, the room temperature resistance of the junction, and the Q decrease of a coil placed in one hole to obtain the optimum response, is discussed in terms of a simplified equivalent circuit. The optimum range of the room temperature resistance of the junction has been found to be 10-17Ω. Stability of the junction has been enhanced by mounting the device in a helium gas sealed can.
