skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A novel tubular superconductor stabilized with static pressurized helium

Abstract

A new superconductor concept for encapsulated, medium-size magnets with a significantly increased stability margin is presented. A tubular superconductor (TSC) of a few millimeters outer diameter is drawn from a billet (normal metal + superconducting inserts). After winding, the TSC is filled with static gaseous helium under pressure, which serves as an enthalpy stabilizer. The approach is beneficial both for NbTi and Nb{sub 3}Sn magnets, including conductively cooled magnets. For example, Nb{sub 3}Sn TSC magnet for 8 T, 8 K operation has a stability margin up to 8 times greater than a corresponding magnet using a conventional conductor. The stability margin against slow (steady-state) and transient disturbances has been analyzed for TSC and cable-in-conduit conductors (CICC). Analytical expressions for the stability margin have been obtained and optimal helium cross-section have been determined. Results can be used to design helium-filled conductors for magnets operating to maximum stability margin.

Authors:
; ;  [1]
  1. Babcock and Wilcox, Lynchburg, VA (United States)
Publication Date:
OSTI Identifier:
33523
Report Number(s):
CONF-930926-
Journal ID: IEMGAQ; ISSN 0018-9464; TRN: 95:009257
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics
Additional Journal Information:
Journal Volume: 30; Journal Issue: 4Pt2; Conference: 13. international conference on magnet technology, Victoria (Canada), 20-24 Sep 1993; Other Information: PBD: Jul 1994
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; SUPERCONDUCTING MAGNETS; DESIGN; SUPERCONDUCTING CABLES; NIOBIUM ALLOYS; TITANIUM ALLOYS; TIN ALLOYS; STABILITY; ANALYTICAL SOLUTION

Citation Formats

Lvovsky, Y M, Kral, S F, and Rackov, P M. A novel tubular superconductor stabilized with static pressurized helium. United States: N. p., 1994. Web. doi:10.1109/20.305735.
Lvovsky, Y M, Kral, S F, & Rackov, P M. A novel tubular superconductor stabilized with static pressurized helium. United States. https://doi.org/10.1109/20.305735
Lvovsky, Y M, Kral, S F, and Rackov, P M. 1994. "A novel tubular superconductor stabilized with static pressurized helium". United States. https://doi.org/10.1109/20.305735.
@article{osti_33523,
title = {A novel tubular superconductor stabilized with static pressurized helium},
author = {Lvovsky, Y M and Kral, S F and Rackov, P M},
abstractNote = {A new superconductor concept for encapsulated, medium-size magnets with a significantly increased stability margin is presented. A tubular superconductor (TSC) of a few millimeters outer diameter is drawn from a billet (normal metal + superconducting inserts). After winding, the TSC is filled with static gaseous helium under pressure, which serves as an enthalpy stabilizer. The approach is beneficial both for NbTi and Nb{sub 3}Sn magnets, including conductively cooled magnets. For example, Nb{sub 3}Sn TSC magnet for 8 T, 8 K operation has a stability margin up to 8 times greater than a corresponding magnet using a conventional conductor. The stability margin against slow (steady-state) and transient disturbances has been analyzed for TSC and cable-in-conduit conductors (CICC). Analytical expressions for the stability margin have been obtained and optimal helium cross-section have been determined. Results can be used to design helium-filled conductors for magnets operating to maximum stability margin.},
doi = {10.1109/20.305735},
url = {https://www.osti.gov/biblio/33523}, journal = {IEEE Transactions on Magnetics},
number = 4Pt2,
volume = 30,
place = {United States},
year = {Fri Jul 01 00:00:00 EDT 1994},
month = {Fri Jul 01 00:00:00 EDT 1994}
}