Design description of the coaxial helicity injection (CHI) system on NSTX-U

R. Raman, T. R. Jarboe, B. A. Nelson, D. Mueller, S. C. Jardin, C. Neumeyer, M. Ono, J. E. Menard

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Elimination of the central solenoid would simplify the engineering design of a Fusion Nuclear Science Facility (FNSF) and tokamak based devices. The method of Transient Coaxial Helicity Injection (CHI) has successfully demonstrated formation of a high-quality closed flux plasma in NSTX and will be used as the front end of the start-up method for a full demonstration of non-inductive current start-up, followed by non-inductive current ramp-up using neutral beams in the NSTX-U device that is now under construction at the Princeton Plasma Physics Laboratory (PPPL). CHI is implemented by driving current along open field lines that connect the lower inner and outer divertor plates of a Spherical Torus (ST). The engineering system requirements and the design of the CHI system on NSTX-U are described.

Original languageEnglish (US)
Title of host publication2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013
DOIs
StatePublished - 2013
Event2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013 - San Francisco, CA, United States
Duration: Jun 10 2013Jun 14 2013

Publication series

Name2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013

Other

Other2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013
Country/TerritoryUnited States
CitySan Francisco, CA
Period6/10/136/14/13

All Science Journal Classification (ASJC) codes

  • Software

Keywords

  • CHI
  • Helicity injection
  • non-inductive
  • NSTX
  • NSTX-U
  • Plasma start-up
  • solenoid-free
  • Spherical Torus

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