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Title: Superconducting magnetic shielding apparatus and method

Abstract

Disclosed is a method and apparatus for providing magnetic shielding around a working volume. The apparatus includes a hollow elongated superconducting shell or cylinder having an elongated low magnetic pinning central portion, and two high magnetic pinning end regions. Transition portions of varying magnetic pinning properties are interposed between the central and end portions. The apparatus further includes a solenoid substantially coextensive with and overlying the superconducting cylinder, so as to be magnetically coupled therewith. The method includes the steps passing a longitudinally directed current through the superconducting cylinder so as to depin magnetic reservoirs trapped in the cylinder. Next, a circumferentially directed current is passed through the cylinder, while a longitudinally directed current is maintained. Depinned magnetic reservoirs are moved to the end portions of the cylinder, where they are trapped.

Inventors:
 [1];  [1]
  1. (Ames, IA)
Issue Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
864733
Patent Number(s):
4409579
Assignee:
Clem, John R. (Ames, IA);Clem, John R. (Ames, IA) AMES
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
superconducting; magnetic; shielding; apparatus; method; disclosed; providing; volume; hollow; elongated; shell; cylinder; pinning; central; portion; regions; transition; portions; varying; properties; interposed; solenoid; substantially; coextensive; overlying; magnetically; coupled; therewith; steps; passing; longitudinally; directed; current; depin; reservoirs; trapped; circumferentially; passed; maintained; depinned; moved; hollow elongated; superconducting magnet; central portion; superconducting magnetic; magnetically coupled; providing magnetic; shielding apparatus; magnetic shielding; transition portion; magnetic shield; coupled therewith; /335/174/505/

Citation Formats

Clem, John R., and Clem, John R. Superconducting magnetic shielding apparatus and method. United States: N. p., 1983. Web.
Clem, John R., & Clem, John R. Superconducting magnetic shielding apparatus and method. United States.
Clem, John R., and Clem, John R. Sat . "Superconducting magnetic shielding apparatus and method". United States. https://www.osti.gov/servlets/purl/864733.
@article{osti_864733,
title = {Superconducting magnetic shielding apparatus and method},
author = {Clem, John R. and Clem, John R.},
abstractNote = {Disclosed is a method and apparatus for providing magnetic shielding around a working volume. The apparatus includes a hollow elongated superconducting shell or cylinder having an elongated low magnetic pinning central portion, and two high magnetic pinning end regions. Transition portions of varying magnetic pinning properties are interposed between the central and end portions. The apparatus further includes a solenoid substantially coextensive with and overlying the superconducting cylinder, so as to be magnetically coupled therewith. The method includes the steps passing a longitudinally directed current through the superconducting cylinder so as to depin magnetic reservoirs trapped in the cylinder. Next, a circumferentially directed current is passed through the cylinder, while a longitudinally directed current is maintained. Depinned magnetic reservoirs are moved to the end portions of the cylinder, where they are trapped.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

Patent:

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