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Title: Mechanical Utility Structure for Testing High Field Superconducting Dipole Magnets

Abstract

© 2002-2011 IEEE. The U.S. Magnet Development Program (MDP) collaboration is designing a utility mechanical structure for testing various high-field superconducting dipole coils. The design uses a shell-based structure concept, which allows applying preload in two steps: During a room temperature assembly and during a cool down to a cryogenic temperature. The structure is designed to accommodate various coil designs - including Nb3Sn Cosine Theta (CT) and Canted CT magnets as well as hybrid magnets with high temperature superconductor cables. Superconducting coils, enclosed by bolted pads to form an octagonal coil pack, will be inserted into a reusable yoke-shell subassembly and precisely preloaded during the assembly using a bladder-and-key technology. Due to a differential thermal contraction between an external aluminum shell and the magnet core, the coil preload increases during the cool down up to level required for 17-T excitation. Such a reusable structure will serve as a testing fixture supporting goals of the MDP program, decreasing cost and simplifying coil performance testing at different preload levels. We present a finite-element analysis of the structure preloading various coil designs and examine the predicted coil stress at each step of the magnet assembly and excitation.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [1]; ORCiD logo [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1564052
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Applied Superconductivity
Additional Journal Information:
Journal Volume: 29; Journal Issue: 5; Journal ID: ISSN 1051-8223
Country of Publication:
United States
Language:
English

Citation Formats

Juchno, Mariusz, Brouwer, Lucas, Caspi, Shlomo, Hafalia, A., Novitski, Igor, Prestemon, Soren, and Zlobin, Alexander. Mechanical Utility Structure for Testing High Field Superconducting Dipole Magnets. United States: N. p., 2019. Web. doi:10.1109/tasc.2019.2896044.
Juchno, Mariusz, Brouwer, Lucas, Caspi, Shlomo, Hafalia, A., Novitski, Igor, Prestemon, Soren, & Zlobin, Alexander. Mechanical Utility Structure for Testing High Field Superconducting Dipole Magnets. United States. doi:10.1109/tasc.2019.2896044.
Juchno, Mariusz, Brouwer, Lucas, Caspi, Shlomo, Hafalia, A., Novitski, Igor, Prestemon, Soren, and Zlobin, Alexander. Thu . "Mechanical Utility Structure for Testing High Field Superconducting Dipole Magnets". United States. doi:10.1109/tasc.2019.2896044.
@article{osti_1564052,
title = {Mechanical Utility Structure for Testing High Field Superconducting Dipole Magnets},
author = {Juchno, Mariusz and Brouwer, Lucas and Caspi, Shlomo and Hafalia, A. and Novitski, Igor and Prestemon, Soren and Zlobin, Alexander},
abstractNote = {© 2002-2011 IEEE. The U.S. Magnet Development Program (MDP) collaboration is designing a utility mechanical structure for testing various high-field superconducting dipole coils. The design uses a shell-based structure concept, which allows applying preload in two steps: During a room temperature assembly and during a cool down to a cryogenic temperature. The structure is designed to accommodate various coil designs - including Nb3Sn Cosine Theta (CT) and Canted CT magnets as well as hybrid magnets with high temperature superconductor cables. Superconducting coils, enclosed by bolted pads to form an octagonal coil pack, will be inserted into a reusable yoke-shell subassembly and precisely preloaded during the assembly using a bladder-and-key technology. Due to a differential thermal contraction between an external aluminum shell and the magnet core, the coil preload increases during the cool down up to level required for 17-T excitation. Such a reusable structure will serve as a testing fixture supporting goals of the MDP program, decreasing cost and simplifying coil performance testing at different preload levels. We present a finite-element analysis of the structure preloading various coil designs and examine the predicted coil stress at each step of the magnet assembly and excitation.},
doi = {10.1109/tasc.2019.2896044},
journal = {IEEE Transactions on Applied Superconductivity},
issn = {1051-8223},
number = 5,
volume = 29,
place = {United States},
year = {2019},
month = {8}
}