FLUX DAM, A METHOD TO REDUCE EXTRA LOW-FREQUENCY NOISE WHEN A SUPERCONDUCTING MAGNETOMETER IS EXPOSED TO A MAGNETIC-FIELD

被引：89

作者：

KOCH, RH ^{[1
]}

SUN, JZ ^{[1
]}

Foglietti, V ^{[1
]}

GALLAGHER, WJ ^{[1
]}

机构：

[1] IST ELETTRON STATO SOLIDO, ROME, ITALY

来源：

APPLIED PHYSICS LETTERS | 1995年 / 67卷 / 05期

关键词：

D O I：

10.1063/1.115282

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This letter discusses the effects of a moderate magnetic field applied to a SQUID magnetometer and introduces the invention of the ''flux dam.'' A flux dam is a weak link or Josephson junction in series with the pickup loop which allows magnetic flux to enter and leave the inside of the superconducting loop easily for moderate changes in magnetic field. This largely prevents the flux lines from entering and being pinned in the superconducting parts of the magnetometer which would create extra low frequency noise. SQUID magnetometers with flux dams in the pickup loop can be operated in the Earth's magnetic field without a significant increase in low frequency flux noise. (C) 1995 American Institute of Physics.

引用

页码：709 / 711

页数：3

共 4 条

[1] FLICKER (1/F) NOISE IN TUNNEL JUNCTION DC SQUIDS [J].