skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Heat Treatment Optimization of Rutherford Cables for a 15 T Nb3Sn Dipole Demonstrator

Abstract

FNAL has been developing a 15 T Nb3Sn dipole demonstrator for a future Very High Energy pp Collider based on an optimized 60-mm aperture 4-layer “cos-theta” coil. In order to increase magnet efficiency, we graded the coil by using two cables with same 15 mm width and different thicknesses made of two different Restacked Rod Process (RRP®) wires. Due to the non-uniform field distribution in dipole coils the maximum field in the inner coil will reach 15-16 T, whereas the maximum field in the outer coil is 12-13 T. In preparation for the 15 T dipole coil reaction, heat treatment studies were performed on strands extracted from these cables with the goal of achieving the best coil performance in the corresponding magnetic fields. Particularly, the effect of maximum temperature and time on the cable critical current was studied to take into account actual variations of these parameters during coil reaction. In parallel and in collaboration with OST, development was performed on optimizing Nb3Sn RRP® wire design and layout. Index Terms— Accelerator magnet, critical current density, Nb3Sn strand, Rutherford cable.

Authors:
ORCiD logo [1];  [1];  [2];  [1];  [2];  [2];  [1];  [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Oxford Instruments, Carteret, NJ (United States). Superconducting Technology
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
HighFled Magnets
OSTI Identifier:
1339108
Report Number(s):
FERMILAB-CONF-16-607-TD
Journal ID: ISSN 1051-8223; 1508570; TRN: US1701017
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
IEEE Transactions on Applied Superconductivity
Additional Journal Information:
Journal Volume: PP; Journal Issue: 99; Conference: Applied Superconductivity Conference, Denver, CO (United States), 4-9 Sept 2016; Journal ID: ISSN 1051-8223
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; accelerator magnet; critical current density; Nb3Sn strand; Rutherford cable

Citation Formats

Barzi, Emanuela, Bossert, Marianne, Field, Michael, Li, Pei, Miao, Hanping, Parrell, Jeff, Turrioni, Daniele, and Zlobin, Alexander. Heat Treatment Optimization of Rutherford Cables for a 15 T Nb3Sn Dipole Demonstrator. United States: N. p., 2017. Web. doi:10.1109/TASC.2016.2645180.
Barzi, Emanuela, Bossert, Marianne, Field, Michael, Li, Pei, Miao, Hanping, Parrell, Jeff, Turrioni, Daniele, & Zlobin, Alexander. Heat Treatment Optimization of Rutherford Cables for a 15 T Nb3Sn Dipole Demonstrator. United States. https://doi.org/10.1109/TASC.2016.2645180
Barzi, Emanuela, Bossert, Marianne, Field, Michael, Li, Pei, Miao, Hanping, Parrell, Jeff, Turrioni, Daniele, and Zlobin, Alexander. 2017. "Heat Treatment Optimization of Rutherford Cables for a 15 T Nb3Sn Dipole Demonstrator". United States. https://doi.org/10.1109/TASC.2016.2645180. https://www.osti.gov/servlets/purl/1339108.
@article{osti_1339108,
title = {Heat Treatment Optimization of Rutherford Cables for a 15 T Nb3Sn Dipole Demonstrator},
author = {Barzi, Emanuela and Bossert, Marianne and Field, Michael and Li, Pei and Miao, Hanping and Parrell, Jeff and Turrioni, Daniele and Zlobin, Alexander},
abstractNote = {FNAL has been developing a 15 T Nb3Sn dipole demonstrator for a future Very High Energy pp Collider based on an optimized 60-mm aperture 4-layer “cos-theta” coil. In order to increase magnet efficiency, we graded the coil by using two cables with same 15 mm width and different thicknesses made of two different Restacked Rod Process (RRP®) wires. Due to the non-uniform field distribution in dipole coils the maximum field in the inner coil will reach 15-16 T, whereas the maximum field in the outer coil is 12-13 T. In preparation for the 15 T dipole coil reaction, heat treatment studies were performed on strands extracted from these cables with the goal of achieving the best coil performance in the corresponding magnetic fields. Particularly, the effect of maximum temperature and time on the cable critical current was studied to take into account actual variations of these parameters during coil reaction. In parallel and in collaboration with OST, development was performed on optimizing Nb3Sn RRP® wire design and layout. Index Terms— Accelerator magnet, critical current density, Nb3Sn strand, Rutherford cable.},
doi = {10.1109/TASC.2016.2645180},
url = {https://www.osti.gov/biblio/1339108}, journal = {IEEE Transactions on Applied Superconductivity},
issn = {1051-8223},
number = 99,
volume = PP,
place = {United States},
year = {2017},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share: