Dimensional changes of Nb3Sn Rutherford cables during heat treatment

Rochepault, E.; Ferracin, P.; Ambrosio, G.; Anerella, M.; Ballarino, A.; Bonasia, A.; Bordini, B.; Cheng, D.; Dietderich, D. R.; Felice, H.; Fajardo, L. Garcia; Ghosh, A.; Holik, E. F.; Bermudez, S. Izquierdo; Perez, J. C.; Pong, I.; Schmalzle, J.; Yu, M.

doi:10.1109/TASC.2016.2539156

Title: Dimensional changes of Nb₃Sn Rutherford cables during heat treatment

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Abstract

In high field magnet applications, Nb 3 Sn coils undergo a heat treatment step after winding. During this stage, coils radially expand and longitudinally contract due to the Nb 3 Sn phase change. In order to prevent residual strain from altering superconducting performances, the tooling must provide the adequate space for these dimensional changes. The aim of this paper is to understand the behavior of cable dimensions during heat treatment and to provide estimates of the space to be accommodated in the tooling for coil expansion and contraction. This paper summarizes measurements of dimensional changes on strands, single Rutherford cables, cable stacks, and coils performed between 2013 and 2015. These samples and coils have been performed within a collaboration between CERN and the U.S. LHC Accelerator Research Program to develop Nb 3 Sn quadrupole magnets for the HiLumi LHC. The results are also compared with other high field magnet projects.

Authors:

Rochepault, E. ^[1]; Ferracin, P. ^[1]; Ambrosio, G. ^[2]; Anerella, M. ^[3]; Ballarino, A. ^[1]; Bonasia, A. ^[1]; Bordini, B. ^[1]; Cheng, D. ^[4]; Dietderich, D. R. ^[4]; Felice, H. ^[4]; Fajardo, L. Garcia ^[1]; Ghosh, A. ^[3]; Holik, E. F. ^[2]; Bermudez, S. Izquierdo ^[1]; Perez, J. C. ^[1]; Pong, I. ^[4]; Schmalzle, J. ^[3]; Yu, M. ^[2]

European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Publication Date:: Wed Jun 01 00:00:00 EDT 2016

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1326592

Alternate Identifier(s):: OSTI ID: 1454465

Report Number(s):: FERMILAB-PUB-16-055-TD
Journal ID: ISSN 1051-8223; 1466573

Grant/Contract Number:: AC02-07CH11359; AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Applied Superconductivity

Additional Journal Information:: Journal Volume: 26; Journal Issue: 4; Journal ID: ISSN 1051-8223

Publisher:: Institute of Electrical and Electronics Engineers (IEEE)

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; conductor dimensions; heat treatment; Nb₃Sn conductors; Rutherford cables; cable insulation; coils; superconducting cables; niobioum-tin; superconducting magnets

Citation Formats


                    Rochepault, E., Ferracin, P., Ambrosio, G., Anerella, M., Ballarino, A., Bonasia, A., Bordini, B., Cheng, D., Dietderich, D. R., Felice, H., Fajardo, L. Garcia, Ghosh, A., Holik, E. F., Bermudez, S. Izquierdo, Perez, J. C., Pong, I., Schmalzle, J., and Yu, M. Dimensional changes of Nb3Sn Rutherford cables during heat treatment.  United States: N. p., 2016. 
Web.  doi:10.1109/TASC.2016.2539156.

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                    Rochepault, E., Ferracin, P., Ambrosio, G., Anerella, M., Ballarino, A., Bonasia, A., Bordini, B., Cheng, D., Dietderich, D. R., Felice, H., Fajardo, L. Garcia, Ghosh, A., Holik, E. F., Bermudez, S. Izquierdo, Perez, J. C., Pong, I., Schmalzle, J., & Yu, M. Dimensional changes of Nb3Sn Rutherford cables during heat treatment.  United States.  https://doi.org/10.1109/TASC.2016.2539156

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                    Rochepault, E., Ferracin, P., Ambrosio, G., Anerella, M., Ballarino, A., Bonasia, A., Bordini, B., Cheng, D., Dietderich, D. R., Felice, H., Fajardo, L. Garcia, Ghosh, A., Holik, E. F., Bermudez, S. Izquierdo, Perez, J. C., Pong, I., Schmalzle, J., and Yu, M. Wed .  
"Dimensional changes of Nb3Sn Rutherford cables during heat treatment".  United States.  https://doi.org/10.1109/TASC.2016.2539156.  https://www.osti.gov/servlets/purl/1326592.

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@article{osti_1326592,

  title        = {Dimensional changes of Nb3Sn Rutherford cables during heat treatment},

  author       = {Rochepault, E. and Ferracin, P. and Ambrosio, G. and Anerella, M. and Ballarino, A. and Bonasia, A. and Bordini, B. and Cheng, D. and Dietderich, D. R. and Felice, H. and Fajardo, L. Garcia and Ghosh, A. and Holik, E. F. and Bermudez, S. Izquierdo and Perez, J. C. and Pong, I. and Schmalzle, J. and Yu, M.},

  abstractNote = {In high field magnet applications, Nb 3 Sn coils undergo a heat treatment step after winding. During this stage, coils radially expand and longitudinally contract due to the Nb 3 Sn phase change. In order to prevent residual strain from altering superconducting performances, the tooling must provide the adequate space for these dimensional changes. The aim of this paper is to understand the behavior of cable dimensions during heat treatment and to provide estimates of the space to be accommodated in the tooling for coil expansion and contraction. This paper summarizes measurements of dimensional changes on strands, single Rutherford cables, cable stacks, and coils performed between 2013 and 2015. These samples and coils have been performed within a collaboration between CERN and the U.S. LHC Accelerator Research Program to develop Nb 3 Sn quadrupole magnets for the HiLumi LHC. The results are also compared with other high field magnet projects.},

  doi          = {10.1109/TASC.2016.2539156},

  journal      = {IEEE Transactions on Applied Superconductivity},

  number       = 4,

  volume       = 26,

  place        = {United States},

  year         = {Wed Jun 01 00:00:00 EDT 2016},

  month        = {Wed Jun 01 00:00:00 EDT 2016}

}

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Title: Dimensional changes of Nb3Sn Rutherford cables during heat treatment

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Title: Dimensional changes of Nb₃Sn Rutherford cables during heat treatment