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Title: Test results of TQS03: a LARP shell-based Nb3Sn quadrupole using 108/127 conductor

Abstract

Future insertion quadrupoles with large apertures and high gradients will be required for the Phase II luminosity upgrade (10{sup 35} cm{sup -2}s{sup -1}) of the Large Hadron Collider (LHC). Although improved designs, based on NbTi, are being considered as an intermediate step for the Phase I upgrade, the Nb{sub 3}Sn conductor is presently the best option that meets the ultimate performance goals for both operating field and temperature margin. As part of the development of Nb{sub 3}Sn magnet technology, the LHC Accelerator Research Program (LARP) developed and tested several 1-meter long, 90-mm aperture Nb{sub 3}Sn quadrupoles. The first two series of magnet used OST MJR 54/61 (TQ01 series) and OST RRP 54/61 (TQ02 series) strands. The third series (TQ03) used OST RRP 108/127 conductor. The larger number of sub-elements and the consequent reduction of the effective filament size, together with an increased fraction of copper and a lower Jc were expected to improve the conductor stability. The new coils were tested in the TQS03 series using a shell structure assembled with keys and bladders. The objective of the first test (TQS03a) was to evaluate the performances of the 108/127 conductor and, in particular, its behaviour at 1.9 K, while themore » second test (TQS03b) investigated the impact on high azimuthal pre-stress on the magnet performance. This paper reports on TQS03 fabrication, the strain gauge measurements performed during assembly, cool-down, excitation and the quench behavior of the two magnets.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Accelerator& Fusion Research Division
OSTI Identifier:
988079
Report Number(s):
LBNL-3891E
TRN: US1006593
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Journal of Physics: Conference Series
Additional Journal Information:
Journal Volume: 032002
Country of Publication:
United States
Language:
English
Subject:
75; 43; ACCELERATORS; APERTURES; COPPER; EXCITATION; FABRICATION; HADRONS; LUMINOSITY; MAGNETS; PERFORMANCE; QUADRUPOLES; RESEARCH PROGRAMS; STABILITY; STRAINS

Citation Formats

Felice, H, Ambrosio, G, Bajko, M, Barzi, E, Bordini, B, Bossert, R, Caspi, S, Dietderich, D, Ferracin, P, Feuvrier, J, Ghosh, A, Godeke, A, Lizarazo, J, Rossi, L, Sabbi, G, Wanderer, P, Wang, X, and Zlobin, A V. Test results of TQS03: a LARP shell-based Nb3Sn quadrupole using 108/127 conductor. United States: N. p., 2009. Web.
Felice, H, Ambrosio, G, Bajko, M, Barzi, E, Bordini, B, Bossert, R, Caspi, S, Dietderich, D, Ferracin, P, Feuvrier, J, Ghosh, A, Godeke, A, Lizarazo, J, Rossi, L, Sabbi, G, Wanderer, P, Wang, X, & Zlobin, A V. Test results of TQS03: a LARP shell-based Nb3Sn quadrupole using 108/127 conductor. United States.
Felice, H, Ambrosio, G, Bajko, M, Barzi, E, Bordini, B, Bossert, R, Caspi, S, Dietderich, D, Ferracin, P, Feuvrier, J, Ghosh, A, Godeke, A, Lizarazo, J, Rossi, L, Sabbi, G, Wanderer, P, Wang, X, and Zlobin, A V. 2009. "Test results of TQS03: a LARP shell-based Nb3Sn quadrupole using 108/127 conductor". United States. https://www.osti.gov/servlets/purl/988079.
@article{osti_988079,
title = {Test results of TQS03: a LARP shell-based Nb3Sn quadrupole using 108/127 conductor},
author = {Felice, H and Ambrosio, G and Bajko, M and Barzi, E and Bordini, B and Bossert, R and Caspi, S and Dietderich, D and Ferracin, P and Feuvrier, J and Ghosh, A and Godeke, A and Lizarazo, J and Rossi, L and Sabbi, G and Wanderer, P and Wang, X and Zlobin, A V},
abstractNote = {Future insertion quadrupoles with large apertures and high gradients will be required for the Phase II luminosity upgrade (10{sup 35} cm{sup -2}s{sup -1}) of the Large Hadron Collider (LHC). Although improved designs, based on NbTi, are being considered as an intermediate step for the Phase I upgrade, the Nb{sub 3}Sn conductor is presently the best option that meets the ultimate performance goals for both operating field and temperature margin. As part of the development of Nb{sub 3}Sn magnet technology, the LHC Accelerator Research Program (LARP) developed and tested several 1-meter long, 90-mm aperture Nb{sub 3}Sn quadrupoles. The first two series of magnet used OST MJR 54/61 (TQ01 series) and OST RRP 54/61 (TQ02 series) strands. The third series (TQ03) used OST RRP 108/127 conductor. The larger number of sub-elements and the consequent reduction of the effective filament size, together with an increased fraction of copper and a lower Jc were expected to improve the conductor stability. The new coils were tested in the TQS03 series using a shell structure assembled with keys and bladders. The objective of the first test (TQS03a) was to evaluate the performances of the 108/127 conductor and, in particular, its behaviour at 1.9 K, while the second test (TQS03b) investigated the impact on high azimuthal pre-stress on the magnet performance. This paper reports on TQS03 fabrication, the strain gauge measurements performed during assembly, cool-down, excitation and the quench behavior of the two magnets.},
doi = {},
url = {https://www.osti.gov/biblio/988079}, journal = {Journal of Physics: Conference Series},
number = ,
volume = 032002,
place = {United States},
year = {2009},
month = {9}
}