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Title: Test Results for HD1, a 16 Tesla Nb3Sn Dipole Magnet

Abstract

The Superconducting Magnet Group at Lawrence Berkeley National Laboratory has been developing the technology for using brittle superconductor in high-field accelerator magnets. HD1, the latest in a series of magnets, contains two, double-layer Nb{sub 3}Sn flat racetrack coils. This single-bore dipole configuration, using the highest performance conductor available, was designed and assembled for a 16 tesla conductor/structure/pre-stress proof-of-principle. With the combination of brittle conductor and high Lorentz stress, considerable care was taken to predict the magnet's mechanical responses to pre-stress, cool-down, and excitation. Subsequent cold testing satisfied expectations: Training started at 13.6 T, 83% of 'short-sample', achieved 90% in 10 quenches, and reached its peak bore field (16 T) after 19 quenches. The average plateau, {approx}92% of 'short-sample', appeared to be limited by 'stick-slip' conductor motions, consistent with the 16.2 T conductor 'lift-off' pre-stress that was chosen for this first test. Some lessons learned and some implications for future conductor and magnet technology development are presented and discussed.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Accelerator& Fusion Research Division
OSTI Identifier:
1011747
Report Number(s):
LBNL-53243
TRN: US1102201
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: Unknown
Country of Publication:
United States
Language:
English
Subject:
99; ACCELERATORS; CONFIGURATION; DIPOLES; EXCITATION; MAGNETS; PERFORMANCE; SUPERCONDUCTING MAGNETS; SUPERCONDUCTORS; TESTING; TRAINING

Citation Formats

Lietzke, A.F., Bartlett, S., Bish, P., Caspi, S., Chiesa, L., Dietderich, D., Ferracin, P., Gourlay, S.A., Goli, M., Hafalia, R.R., Higley, H., Hannaford, R., Lau, W., Liggens, N., Mattafirri, S., McInturff, A., Nyman, M., Sabbi, G., Scanlan, R., and Swanson, J. Test Results for HD1, a 16 Tesla Nb3Sn Dipole Magnet. United States: N. p., 2003. Web.
Lietzke, A.F., Bartlett, S., Bish, P., Caspi, S., Chiesa, L., Dietderich, D., Ferracin, P., Gourlay, S.A., Goli, M., Hafalia, R.R., Higley, H., Hannaford, R., Lau, W., Liggens, N., Mattafirri, S., McInturff, A., Nyman, M., Sabbi, G., Scanlan, R., & Swanson, J. Test Results for HD1, a 16 Tesla Nb3Sn Dipole Magnet. United States.
Lietzke, A.F., Bartlett, S., Bish, P., Caspi, S., Chiesa, L., Dietderich, D., Ferracin, P., Gourlay, S.A., Goli, M., Hafalia, R.R., Higley, H., Hannaford, R., Lau, W., Liggens, N., Mattafirri, S., McInturff, A., Nyman, M., Sabbi, G., Scanlan, R., and Swanson, J. Wed . "Test Results for HD1, a 16 Tesla Nb3Sn Dipole Magnet". United States. https://www.osti.gov/servlets/purl/1011747.
@article{osti_1011747,
title = {Test Results for HD1, a 16 Tesla Nb3Sn Dipole Magnet},
author = {Lietzke, A.F. and Bartlett, S. and Bish, P. and Caspi, S. and Chiesa, L. and Dietderich, D. and Ferracin, P. and Gourlay, S.A. and Goli, M. and Hafalia, R.R. and Higley, H. and Hannaford, R. and Lau, W. and Liggens, N. and Mattafirri, S. and McInturff, A. and Nyman, M. and Sabbi, G. and Scanlan, R. and Swanson, J.},
abstractNote = {The Superconducting Magnet Group at Lawrence Berkeley National Laboratory has been developing the technology for using brittle superconductor in high-field accelerator magnets. HD1, the latest in a series of magnets, contains two, double-layer Nb{sub 3}Sn flat racetrack coils. This single-bore dipole configuration, using the highest performance conductor available, was designed and assembled for a 16 tesla conductor/structure/pre-stress proof-of-principle. With the combination of brittle conductor and high Lorentz stress, considerable care was taken to predict the magnet's mechanical responses to pre-stress, cool-down, and excitation. Subsequent cold testing satisfied expectations: Training started at 13.6 T, 83% of 'short-sample', achieved 90% in 10 quenches, and reached its peak bore field (16 T) after 19 quenches. The average plateau, {approx}92% of 'short-sample', appeared to be limited by 'stick-slip' conductor motions, consistent with the 16.2 T conductor 'lift-off' pre-stress that was chosen for this first test. Some lessons learned and some implications for future conductor and magnet technology development are presented and discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {10}
}

Conference:
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