Production of Aluminum Stabilized Superconducting Cable for the Mu2e Transport Solenoid

Lombardo, Vito; Ambrosio, Giorgio; Evbota, Daniel; Hocker, Andy; Lamm, Michael; Lopes, Mauricio; Fabbricatore, Pasquale; Curreli, Sebi; Musenich, Riccardo

doi:10.1109/TASC.2018.2793860

Title: Production of Aluminum Stabilized Superconducting Cable for the Mu2e Transport Solenoid

Abstract

Here, the Fermilab Mu2e experiment, currently under construction at Fermilab, has the goal of measuring the rare process of direct muon to electron conversion in the field of a nucleus. The experiment features three large superconducting solenoids: the production solenoid (PS), the transport solenoid (TS), and the detector solenoid (DS). The TS is an “S-shaped” solenoid that sits in between the PS and the DS producing a magnetic field ranging between 2.5 and 2.0 T. This paper describes the various steps that led to the successful procurement of over 740 km of superconducting wire and 44 km of Al-stabilized Rutherford cable needed to build the 52 coils that constitute the Mu2e TS cold mass. The main cable properties and results of electrical and mechanical test campaigns are summarized and discussed. Critical current measurements of the Al-stabilized cables are presented and compared to expected critical current values as measured on extracted strands from the final cables after chemical etching of the aluminum stabilizer. A robust and reliable approach to cable welding is presented, and the effect of cable bending on the transport current is also investigated and presented.

Authors:

Lombardo, Vito ^[1]; Ambrosio, Giorgio ^[1]; Evbota, Daniel ^[1]; Hocker, Andy ^[1]; Lamm, Michael ^[1]; Lopes, Mauricio ^[1];

^[2];

^[2]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
INFN, Genoa, Genova (Italy)

Publication Date:: Mon Jan 15 00:00:00 EST 2018

Research Org.:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

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

OSTI Identifier:: 1418796

Report Number(s):: FERMILAB-CONF-17-588-TD
Journal ID: ISSN 1051-8223; 1650512; TRN: US1801302

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Applied Superconductivity

Additional Journal Information:: Journal Volume: 28; Journal Issue: 3; Conference: 25th International Conference on Magnet Technology, Amsterdam (The Netherlands), 27 Aug - 1 Sep 2017; Journal ID: ISSN 1051-8223

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

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; NbTi; aluminum; conforming; Mu2e; transport solenoid

Citation Formats


                    Lombardo, Vito, Ambrosio, Giorgio, Evbota, Daniel, Hocker, Andy, Lamm, Michael, Lopes, Mauricio, Fabbricatore, Pasquale, Curreli, Sebi, and Musenich, Riccardo. Production of Aluminum Stabilized Superconducting Cable for the Mu2e Transport Solenoid.  United States: N. p., 2018. 
Web.  doi:10.1109/TASC.2018.2793860.

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                    Lombardo, Vito, Ambrosio, Giorgio, Evbota, Daniel, Hocker, Andy, Lamm, Michael, Lopes, Mauricio, Fabbricatore, Pasquale, Curreli, Sebi, & Musenich, Riccardo. Production of Aluminum Stabilized Superconducting Cable for the Mu2e Transport Solenoid.  United States.  https://doi.org/10.1109/TASC.2018.2793860

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                    Lombardo, Vito, Ambrosio, Giorgio, Evbota, Daniel, Hocker, Andy, Lamm, Michael, Lopes, Mauricio, Fabbricatore, Pasquale, Curreli, Sebi, and Musenich, Riccardo. Mon .  
"Production of Aluminum Stabilized Superconducting Cable for the Mu2e Transport Solenoid".  United States.  https://doi.org/10.1109/TASC.2018.2793860.  https://www.osti.gov/servlets/purl/1418796.

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@article{osti_1418796,

  title        = {Production of Aluminum Stabilized Superconducting Cable for the Mu2e Transport Solenoid},

  author       = {Lombardo, Vito and Ambrosio, Giorgio and Evbota, Daniel and Hocker, Andy and Lamm, Michael and Lopes, Mauricio and Fabbricatore, Pasquale and Curreli, Sebi and Musenich, Riccardo},

  abstractNote = {Here, the Fermilab Mu2e experiment, currently under construction at Fermilab, has the goal of measuring the rare process of direct muon to electron conversion in the field of a nucleus. The experiment features three large superconducting solenoids: the production solenoid (PS), the transport solenoid (TS), and the detector solenoid (DS). The TS is an “S-shaped” solenoid that sits in between the PS and the DS producing a magnetic field ranging between 2.5 and 2.0 T. This paper describes the various steps that led to the successful procurement of over 740 km of superconducting wire and 44 km of Al-stabilized Rutherford cable needed to build the 52 coils that constitute the Mu2e TS cold mass. The main cable properties and results of electrical and mechanical test campaigns are summarized and discussed. Critical current measurements of the Al-stabilized cables are presented and compared to expected critical current values as measured on extracted strands from the final cables after chemical etching of the aluminum stabilizer. A robust and reliable approach to cable welding is presented, and the effect of cable bending on the transport current is also investigated and presented.},

  doi          = {10.1109/TASC.2018.2793860},

  journal      = {IEEE Transactions on Applied Superconductivity},

  number       = 3,

  volume       = 28,

  place        = {United States},

  year         = {Mon Jan 15 00:00:00 EST 2018},

  month        = {Mon Jan 15 00:00:00 EST 2018}

}

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Fig. 1: TS NbTi virgin strand cross-section.

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