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Title: Prototype Coil Evaluation for NSTX-U Replacement Inner Poloidal Field Coils

Abstract

The National Spherical Torus eXperiment Upgrade (NSTX-U) is an innovative magnetic fusion device constructed at the Princeton Plasma Physics Laboratory (PPPL). In 2016, because of the failure of the PF-1a upper divertor coil, which experienced a coolant blockage, the NSTX-U operation was suspended. A postmortem investigation indicated that an undetected gradual deterioration of coil inductance preceded the coolant blockage leading up to the operational suspension. The project team decided that all inner poiloidal field (PF) upper and lower coil pairs, denoted PF-1a, PF-1b, and PF-1c, shall be replaced with new coils of improved design and manufacture. Here, the new prototype inner PF coils from four suppliers across the globe were evaluated at PPPL following a prototype technical evaluation procedure. Mechanical inspection and electrical testing were performed to qualify each supplier.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
NSTX-U Coil Test Team
OSTI Identifier:
1558753
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Accepted Manuscript
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Name: Fusion Science and Technology; Journal ID: ISSN 1536-1055
Publisher:
American Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; NSTX-U; fusion magnets; poloidal field coils; prototype; coil testing

Citation Formats

Zhai, Y., Neumeyer, C., Dellas, J., Greenough, N., Kalish, M., Petrella, J., Que, W., and Raftopoulos, S. Prototype Coil Evaluation for NSTX-U Replacement Inner Poloidal Field Coils. United States: N. p., 2019. Web. doi:10.1080/15361055.2019.1610314.
Zhai, Y., Neumeyer, C., Dellas, J., Greenough, N., Kalish, M., Petrella, J., Que, W., & Raftopoulos, S. Prototype Coil Evaluation for NSTX-U Replacement Inner Poloidal Field Coils. United States. doi:10.1080/15361055.2019.1610314.
Zhai, Y., Neumeyer, C., Dellas, J., Greenough, N., Kalish, M., Petrella, J., Que, W., and Raftopoulos, S. Wed . "Prototype Coil Evaluation for NSTX-U Replacement Inner Poloidal Field Coils". United States. doi:10.1080/15361055.2019.1610314.
@article{osti_1558753,
title = {Prototype Coil Evaluation for NSTX-U Replacement Inner Poloidal Field Coils},
author = {Zhai, Y. and Neumeyer, C. and Dellas, J. and Greenough, N. and Kalish, M. and Petrella, J. and Que, W. and Raftopoulos, S.},
abstractNote = {The National Spherical Torus eXperiment Upgrade (NSTX-U) is an innovative magnetic fusion device constructed at the Princeton Plasma Physics Laboratory (PPPL). In 2016, because of the failure of the PF-1a upper divertor coil, which experienced a coolant blockage, the NSTX-U operation was suspended. A postmortem investigation indicated that an undetected gradual deterioration of coil inductance preceded the coolant blockage leading up to the operational suspension. The project team decided that all inner poiloidal field (PF) upper and lower coil pairs, denoted PF-1a, PF-1b, and PF-1c, shall be replaced with new coils of improved design and manufacture. Here, the new prototype inner PF coils from four suppliers across the globe were evaluated at PPPL following a prototype technical evaluation procedure. Mechanical inspection and electrical testing were performed to qualify each supplier.},
doi = {10.1080/15361055.2019.1610314},
journal = {Fusion Science and Technology},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {5}
}

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Works referenced in this record:

Overview of NSTX Upgrade initial results and modelling highlights
journal, June 2017

  • Menard, J. E.; Allain, J. P.; Battaglia, D. J.
  • Nuclear Fusion, Vol. 57, Issue 10, Article No. 102006
  • DOI: 10.1088/1741-4326/aa600a

Engineering design of the National Spherical Torus Experiment
journal, February 2001