PREVIOUS RESEARCH
High Temperature Superconducting Magnetic Shields Formed by Deep Drawing
A new method for the construction of High Temperature Superconducting magnetic
sheilding stuctures has been demonstrated. With this process, a multi-layer
laminate of HTS ceramic powder and silver metal sheets is formed and then
shaped into a cylindrical magnetic shield by deep drawing before being
sintered. Two types of superconducting powders were used in this experiment,
YBaCuO and BiPbSrCaCuO, which exhibited shielding factors of 1100 and 330
respectively. The benefits of these shields are the following:
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Deep drawing is a common industrial technique that we have shown to work
with metal, ceramic laminates
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No exposed HTS layers to degrade with handling, humidity, or condensation
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The shields may be easily modified for screw holes and other common construction
features
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Multiple layers are possible
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Other metals can be included for strength
There are many existing applications that need the high level of electromagnetic
isolation that is obtained with superconducting magnetic shields. For example,
atomic frequency standards, biomagnetic measurement systems, and SQUID
based devices could benefit from the availablity of large, low cost superconducting
magnetic shields.
See Deonna F. Johnson et al., IEEE Transactions on Applied Superconductivity
, March 1996, pp. 50-54.