Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 2911-2914 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 9 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1999 |
| MoE publication type | A1 Journal article-refereed |
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Noise analysis of the double-loop SQUID with unshunted junctions. / Kiviranta, Mikko; Seppä, Heikki.
In: IEEE Transactions on Applied Superconductivity, Vol. 9, No. 2, 1999, p. 2911-2914.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Noise analysis of the double-loop SQUID with unshunted junctions
AU - Kiviranta, Mikko
AU - Seppä, Heikki
N1 - Project code: A8SU00416
PY - 1999
Y1 - 1999
N2 - The unshunted (un) SQUID is a two-junction device whose Josephson junctions are damped at high frequencies only. Single-valued rather than hysteretic behaviour on the negative resistance region is obtained by using a voltage bias rather than a current bias. We have studied numerically the noise properties of the un SQUID with a double-loop (dl) washer configuration, in which the SQUID inductance is capacitively split into two loops. Our simulations with /spl beta//sub c/=0.7 and /spl beta//sub l/=0.5-3 suggest that noise level in the un dl SQUID depends more weakly on the device parameters than in the un SQUID. The best energy resolution obtained in the smooth area of the IV curves is /spl epsiv//spl ap/5k/sub B/T/spl radic/(LC) but in narrow pockets in the non-smooth region /spl epsiv//spl ap/3k/sub B/T/spl radic/(LC) is approached.
AB - The unshunted (un) SQUID is a two-junction device whose Josephson junctions are damped at high frequencies only. Single-valued rather than hysteretic behaviour on the negative resistance region is obtained by using a voltage bias rather than a current bias. We have studied numerically the noise properties of the un SQUID with a double-loop (dl) washer configuration, in which the SQUID inductance is capacitively split into two loops. Our simulations with /spl beta//sub c/=0.7 and /spl beta//sub l/=0.5-3 suggest that noise level in the un dl SQUID depends more weakly on the device parameters than in the un SQUID. The best energy resolution obtained in the smooth area of the IV curves is /spl epsiv//spl ap/5k/sub B/T/spl radic/(LC) but in narrow pockets in the non-smooth region /spl epsiv//spl ap/3k/sub B/T/spl radic/(LC) is approached.
U2 - 10.1109/77.783639
DO - 10.1109/77.783639
M3 - Article
VL - 9
SP - 2911
EP - 2914
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2
ER -