PPPL-3562 is available in <a href="PPPL-3562.pdf">pdf</a> or 
<a href="PPPL-3562.ps">postscript</a> formats.

<p>
<b>Non Inductive Current Generation in NSTX using Coaxial Helicity Injection</b>
</p>

<p>
<b>Authors:</b> R. Raman, T.R. Jarboe, D. Mueller, M.J. Schaffer, R. Maqueda, B.A. Nelson, S. Sabbagh, M. Bell, R. Ewig, E. Fredrickson, D. Gates, J. Hosea, S. Jardin, H. Ji, R. Kaita, S.M. Kaye, H. Kugel, L. Lao, R. Maingi, J. Menard, M. Ono, D. Orvis, F. Paoletti, S. Paul, M. Peng, C.H. Skinner, J.B. Wilgen, S. Zweben, and the NSTX Research Team</p>

<p><b>Date of PPPL Report:</b> May 2001
</p>

<p>
<b>Published in:</b> Nucl. Fusion <B>41</B> (August 2001) 1081-1086. </p>

Coaxial Helicity Injection (CHI) on the National Spherical Torus Experiment (NSTX) has
produced 240 kA of toroidal current without the use of the central solenoid. Values of the current multiplication ratio (CHI produced toroidal current/injector current) up to 10 were obtained, in agreement with predictions. The discharges which lasted for up to 200 ms, limited only by the programmed waveform, are more than an order of magnitude longer in duration that any CHI discharges previously produced in a Spheromak or a Spherical Torus (ST).
</p>