Physics Considerations in the Design of NCSX

Neilson, G.H. ; Zarnstorff, M.C. ; Ku, L.P. ; Lazarus, E.A. ; Mioduszewski, P.K. ; Fenstermacher, M. ; Fredrickson, E. ; Fu, G.Y. ; Grossman, A. ; Heitzenroeder, P.J. ; Hatcher, R.H. ; Hirshman, S.P. ; Hudson, S.R. ; Johnson, D.W. ; Kugel, H.W. ; Lyon, J.F. ; Majeski, R. ; Mikkelsen, D.R. ; Monticello, D.A. ; Nelson, B.E. ; Pomphrey, N. ; Reiersen, W.T. ; Reiman, A.H. ; Rutherford, P.H. ; Schmidt, J.A. ; Spong, D.A. ; Strickler, D.J.

Princeton University. Plasma Physics Laboratory.

关键词: Magnetic Surfaces;    Heating;    70 Plasma Physics And Fusion Technology;    Stellarators;    Divertors;   

DOI  :  10.2172/809845
RP-ID  :  PPPL-3753
RP-ID  :  AC02-76CH03073
RP-ID  :  809845

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来源: UNT Digital Library

【 摘 要 】

Compact stellarators have the potential to make steady-state, disruption-free magnetic fusion systems with beta approximately 5% and relatively low aspect ratio (R/ < 4.5) compared to most drift-optimized stellarators. Magnetic quasi-symmetry can be used to reduce orbit losses. The National Compact Stellarator Experiment (NCSX) is designed to test compact stellarator physics in a high-beta quasi-axisymmetric configuration and to determine the conditions for high-beta disruption-free operation. It is designed around a reference plasma with low ripple, good magnetic surfaces, and stability to the important ideal instabilities at beta approximately 4%. The device size, available heating power, and pulse lengths provide access to a high-beta target plasma state. The NCSX has magnetic flexibility to explore a wide range of equilibrium conditions and has operational flexibility to achieve a wide range of beta and collisionality values. The design provides space to accommodate plasma-facing components for divertor operation and ports for an extensive array of diagnostics.