Observation of Persistent Edge Current Driven by Coaxial Helicity Injection (CHI)

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Coaxial Helicity Injection, CHI, has been used on the National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 40 (2000) 557], the Helicity Injected Torus (HIT) [B.A. Nelson et al., Phys. Rev. Lett. 72 (1994) 3666] and HIT-II [T.R. Jarboe et al., Phys. Plasmas 5 (1998) 1807] to initiate plasma and to drive up to 400 kA of toroidal current. On HIT-II, CHI initiated discharges have been successfully coupled to ohmic sustainment [R. Raman et al., Phys. Plasmas 11 (2004) 2565]. This paper presents the first results on the use of CHI to demonstrate the persistence of edge ... continued below

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Mueller, D.; Nelson, B.A.; Hamp, W.T.; Redd, A.J.; Jarboe, T.R.; O'Neill, R.G. et al. April 21, 2005.

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Coaxial Helicity Injection, CHI, has been used on the National Spherical Torus Experiment (NSTX) [M. Ono et al., Nucl. Fusion 40 (2000) 557], the Helicity Injected Torus (HIT) [B.A. Nelson et al., Phys. Rev. Lett. 72 (1994) 3666] and HIT-II [T.R. Jarboe et al., Phys. Plasmas 5 (1998) 1807] to initiate plasma and to drive up to 400 kA of toroidal current. On HIT-II, CHI initiated discharges have been successfully coupled to ohmic sustainment [R. Raman et al., Phys. Plasmas 11 (2004) 2565]. This paper presents the first results on the use of CHI to demonstrate the persistence of edge current drive in a preestablished single-null diverted inductive discharge. Edge current drive has the potential to improve plasma stability limits [J.E. Menard et al., Nucl. Fusion 37 (1997) 595]. While most current drive methods drive current in the interior of the plasma, CHI is well suited for driving current in the edge plasma.

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  • Report No.: PPPL-4065
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/839171 | External Link
  • Office of Scientific & Technical Information Report Number: 839171
  • Archival Resource Key: ark:/67531/metadc778794

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  • April 21, 2005

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  • Dec. 3, 2015, 9:30 a.m.

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  • Aug. 3, 2016, 6:40 p.m.

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Mueller, D.; Nelson, B.A.; Hamp, W.T.; Redd, A.J.; Jarboe, T.R.; O'Neill, R.G. et al. Observation of Persistent Edge Current Driven by Coaxial Helicity Injection (CHI), report, April 21, 2005; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc778794/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.