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

Title: Solenoid-Less Plasma Start-Up in NSTX Using Transient CHI

Abstract

Experiments in NSTX have now unambiguously demonstrated the coupling of toroidal plasmas produced by the method of transient Coaxial Helicity Injection (CHI) to inductive sustainment and ramp-up of the toroidal current. The coupled discharges have ramped up to 700 kA and transitioned into H-mode with low inductance typical of the type of discharges needed for long-pulse operation, demonstrating the compatibility of the CHI startup method to conventional inductive operation used since the start of tokamak research. The method was first demonstrated on the smaller concept exploration device HIT-H at the University of Washington. These new results that were obtained on a machine built with mainly conventional components and on a size scale closer to a Component Test Facility, demonstrate that CHI is a viable solenoid-free plasma startup method for future STs and Tokamaks.

Authors:
 [1];  [2];  [3];  [1];  [3];  [3];  [3];  [3];  [3];  [3];  [2];  [4];  [5];  [3];  [6];  [7]
  1. University of Washington, Seattle
  2. ORNL
  3. Princeton Plasma Physics Laboratory (PPPL)
  4. Nova Photonics, Princeton, NJ
  5. Himeji Institute of Technology, Japan
  6. Columbia University
  7. Lawrence Livermore National Laboratory (LLNL)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1018304
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 18th American-Nuclear Society Topical Meeting on the Technology of Fusion Energy, San Francisco, CA, USA, 20080928, 20081002
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPATIBILITY; EXPLORATION; HELICITY; INDUCTANCE; PLASMA; START-UP; THERMONUCLEAR REACTORS; TRANSIENTS; COAXIAL HELICITY INJECTION; SPHERICAL TORUS EXPERIMENT; TOKAMAK

Citation Formats

Raman, R, Nelson, Brad E, Mueller, D, Jarboe, T, Bell, M, Menard, J, Ono, M, Be, R, Gates, D, LaBlanc, B P, Maingi, Rajesh, Maqueda, R J, Nagata, M, Roquemore, L, Sabbagh, S A, and Soukhanovskii, V. Solenoid-Less Plasma Start-Up in NSTX Using Transient CHI. United States: N. p., 2009. Web.
Raman, R, Nelson, Brad E, Mueller, D, Jarboe, T, Bell, M, Menard, J, Ono, M, Be, R, Gates, D, LaBlanc, B P, Maingi, Rajesh, Maqueda, R J, Nagata, M, Roquemore, L, Sabbagh, S A, & Soukhanovskii, V. Solenoid-Less Plasma Start-Up in NSTX Using Transient CHI. United States.
Raman, R, Nelson, Brad E, Mueller, D, Jarboe, T, Bell, M, Menard, J, Ono, M, Be, R, Gates, D, LaBlanc, B P, Maingi, Rajesh, Maqueda, R J, Nagata, M, Roquemore, L, Sabbagh, S A, and Soukhanovskii, V. 2009. "Solenoid-Less Plasma Start-Up in NSTX Using Transient CHI". United States.
@article{osti_1018304,
title = {Solenoid-Less Plasma Start-Up in NSTX Using Transient CHI},
author = {Raman, R and Nelson, Brad E and Mueller, D and Jarboe, T and Bell, M and Menard, J and Ono, M and Be, R and Gates, D and LaBlanc, B P and Maingi, Rajesh and Maqueda, R J and Nagata, M and Roquemore, L and Sabbagh, S A and Soukhanovskii, V},
abstractNote = {Experiments in NSTX have now unambiguously demonstrated the coupling of toroidal plasmas produced by the method of transient Coaxial Helicity Injection (CHI) to inductive sustainment and ramp-up of the toroidal current. The coupled discharges have ramped up to 700 kA and transitioned into H-mode with low inductance typical of the type of discharges needed for long-pulse operation, demonstrating the compatibility of the CHI startup method to conventional inductive operation used since the start of tokamak research. The method was first demonstrated on the smaller concept exploration device HIT-H at the University of Washington. These new results that were obtained on a machine built with mainly conventional components and on a size scale closer to a Component Test Facility, demonstrate that CHI is a viable solenoid-free plasma startup method for future STs and Tokamaks.},
doi = {},
url = {https://www.osti.gov/biblio/1018304}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 2009},
month = {Wed Jul 01 00:00:00 EDT 2009}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: