Development of a vector-tensor system to measure the absolute magnetic flux density and its gradient in magnetically shielded rooms
作者： J. Voigt , S. Knappe-Grüneberg , D. Gutkelch , J. Haueisen , S. Neuber
DOI: 10.1063/1.4921583
关键词:
摘要: Several experiments in fundamental physics demand an environment of very low, homogeneous, and stable magnetic fields. For the characterization such environments, we present a portable SQUID system that measures absolute flux density vector gradient tensor. This vector-tensor contains 13 integrated low-critical temperature (LTc) superconducting quantum interference devices (SQUIDs) inside small cylindrical liquid helium Dewar with height 31 cm 37 diameter. The achievable resolution depends on field under investigation its temporal drift. Inside seven-layer mu-metal shield, accuracy better than ±23 pT for components static ±2 pT/cm each nine tensor is reached by using shifting method.
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