Browse Prior Art Database

High Tc Superconducting Magnet Shields

IP.com Disclosure Number: IPCOM000112963D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Laibowitz, RB: AUTHOR [+2]

Abstract

Disclosed is a system in which high Tc superconducting thin films are used as magnetic shields and in which the thin films themselves may be produced. An example is a vapor deposition system utilizing multiple electron beams to deposit the superconducting thin films. In such a system magnetic shielding of one beam from the next is needed for effective deposition. Magnetic shielding is often needed in other types of deposition systems, e.g., sputtering and molecular beam evaporation (MBE). The shielding thin films can also be deposited in a separate system.

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High Tc Superconducting Magnet Shields

      Disclosed is a system in which high Tc superconducting thin
films are used as magnetic shields and in which the thin films
themselves may be produced.  An example is a vapor deposition system
utilizing multiple electron beams to deposit the superconducting thin
films.  In such a system magnetic shielding of one beam from the next
is needed for effective deposition.  Magnetic shielding is often
needed in other types of deposition systems, e.g., sputtering and
molecular beam evaporation (MBE).  The shielding thin films can also
be deposited in a separate system.

      In a variety of multiple source vapor deposition systems,
magnetic shielding is used to isolate one source from another.  To
deposit thin films of the high Tc superconductor, YBaCuO, for
example, three sources may be used which should not interfere with
each other.  Many systems have even more sources depending on the
particular application and the sources often must be magnetically
shielded from each other.  In the past mu-metal and certain steels
have been used.  These materials do not completely isolate the
electromagnetic fields generated by the sources and by other outside
effects.  Superconducting thin films will provide effective shielding
and may be deposited on a variety materials and placed so as to
shield each source.  As changes are made in the system, more
shielding material may be added by depositing more superconductor.
In this way th...