Toroidal Field Reversing Switch
Abstract
A motor-driven, high-current switch is being designed by Stäubli Electrical Connectors in collaboration with Princeton Plasma Physics Laboratory to reverse the DIII-D Toroidal field coil current. The existing field reversing procedure requires approximately 4 h of labor performed between run days to reconfigure the bus work, thus requiring a separate run day to complete experimental scans with both field directions. This typically results in different wall conditions which complicate the results or make them invalid. The proposed switch will complete the reversal process in approximately 4-5 min, between shots, so that wall conditions are not a factor, and easily fits within the 10-12 min DIII-D shot cycle. The switch is a compact design fitting into a 157.5 × 41 cm envelope. The switch uses two copper pins that slide between Stäubli MULTILAM contacts. The switch is rated for total current of 180-kA dc for 10 s with a 12-min repetition rate; the maximum operating coil current is 124-kA dc. The switch diagnostics include: voltage drop, current monitor, thermal monitors, position sensors, and motor torque. Here, the switch is rated for 300 cycles per year, and 3000 cycles overall before contact replacement, with contact inspection yearly. The design details and operationmore »
- Authors:
-
[1];
[1];
- Princeton Univ., NJ (United States)
- Stäubli Electrical Connectors, Windsor, CA (United States)
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1818984
- Grant/Contract Number:
- FC02-04ER54698; AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- IEEE Transactions on Plasma Science
- Additional Journal Information:
- Journal Volume: 48; Journal Issue: 12; Journal ID: ISSN 0093-3813
- Publisher:
- IEEE
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Fusion reactor design; power control; tokamak devices
Citation Formats
Raines, T., Nagy, A., Fisher, P., Carver, D., Locke, N., Brewer, B., Brooks, A., and Torreblanca, H. Toroidal Field Reversing Switch. United States: N. p., 2020.
Web. doi:10.1109/tps.2020.3036029.
Raines, T., Nagy, A., Fisher, P., Carver, D., Locke, N., Brewer, B., Brooks, A., & Torreblanca, H. Toroidal Field Reversing Switch. United States. https://doi.org/10.1109/tps.2020.3036029
Raines, T., Nagy, A., Fisher, P., Carver, D., Locke, N., Brewer, B., Brooks, A., and Torreblanca, H. Mon .
"Toroidal Field Reversing Switch". United States. https://doi.org/10.1109/tps.2020.3036029. https://www.osti.gov/servlets/purl/1818984.
@article{osti_1818984,
title = {Toroidal Field Reversing Switch},
author = {Raines, T. and Nagy, A. and Fisher, P. and Carver, D. and Locke, N. and Brewer, B. and Brooks, A. and Torreblanca, H.},
abstractNote = {A motor-driven, high-current switch is being designed by Stäubli Electrical Connectors in collaboration with Princeton Plasma Physics Laboratory to reverse the DIII-D Toroidal field coil current. The existing field reversing procedure requires approximately 4 h of labor performed between run days to reconfigure the bus work, thus requiring a separate run day to complete experimental scans with both field directions. This typically results in different wall conditions which complicate the results or make them invalid. The proposed switch will complete the reversal process in approximately 4-5 min, between shots, so that wall conditions are not a factor, and easily fits within the 10-12 min DIII-D shot cycle. The switch is a compact design fitting into a 157.5 × 41 cm envelope. The switch uses two copper pins that slide between Stäubli MULTILAM contacts. The switch is rated for total current of 180-kA dc for 10 s with a 12-min repetition rate; the maximum operating coil current is 124-kA dc. The switch diagnostics include: voltage drop, current monitor, thermal monitors, position sensors, and motor torque. Here, the switch is rated for 300 cycles per year, and 3000 cycles overall before contact replacement, with contact inspection yearly. The design details and operation of the switch are covered in this article.},
doi = {10.1109/tps.2020.3036029},
journal = {IEEE Transactions on Plasma Science},
number = 12,
volume = 48,
place = {United States},
year = {Mon Nov 16 00:00:00 EST 2020},
month = {Mon Nov 16 00:00:00 EST 2020}
}
Search WorldCat to find libraries that may hold this journalWorks referenced in this record:
Flux Driven Detachment Bifurcation in the DIII-D Tokamak
journal, August 2018
- Jaervinen, A. E.; Allen, S. L.; Eldon, D.
- Physical Review Letters, Vol. 121, Issue 7