Return To: Session PD/T - Post Deadline Talks
Prev Page: Session PD/T - Post Deadline Talks
Next Page: (PD/T-2) Formation of an Advanced Tokamak Plasma without

(PD/T-1) Self-Consistent, Integrated, Advanced Tokamak Operation in DIII-D

M.R. Wade¹⁾, M. Murakami¹⁾, T.C. Luce²⁾, J.R. Ferron²⁾, C.C. Petty²⁾, D.P. Brennan³⁾, A.M. Garofalo⁴⁾, C.M. Greenfield²⁾, A.W. Hyatt²⁾, R. Jayakumar⁵⁾, R.J. La Haye²⁾, L.L. Lao²⁾, J. Lohr²⁾, P.A. Politzer²⁾, R. Prater²⁾, E.J. Strait^2)
 
1) Oak Ridge National Laobratory, Oak Ridge, Tennessee, USA
²⁾ General Atomics, San Diego, California, USA
³⁾ Oak Ridge Institute for Science Education, Oak Ridge, Tennessee, USA
⁴⁾ Columbia University, New York, New York
⁵⁾ Lawrence Livermore National Laboratory, Livermore, California, USA

Abstract.  Recent experiments on DIII-D have demonstrated the ability to sustain plasma conditions that integrate and sustain the key ingredients of Advanced Tokamak (AT) operation: high $\beta$ with q_min  $\gg$  1, good energy confinement, and high current drive efficiency. Utilizing off-axis ( $\rho$  =  0.4) electron cyclotron current drive (ECCD) to modify the current density profile in a plasma operating near the no-wall ideal stability limit with q_min  >  2.0, plasmas with $\beta$  $\approx$   2.9% and 90% of the plasma current driven non-inductively have been sustained for nearly 2 s (limited only by the duration of the ECCD pulse. Separate experiments have demonstrated the ability to sustain a steady current density profile using ECCD for periods as long as 1 s with $\beta$ = 3.3% and > 90% of the current driven non-inductively.

Read the full paper in PDF format.