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The purpose of this paper is to present a critique of the ratio of the total input power (P) to the major radius (R) as the figure of merit for tokamak divertor studies. Dimensionless similarity of tokamak divertors is discussed and a new approximate similarity is proposed. This similarity takes the field-line angle in the divertor to be variable. This enables all the dimensionless plasma parameters to be matched, and places less demand upon the heating power and target heat flux. A least-squares similarity fitting approach is described and applied for different transport assumptions. It shows that existing tokamaks can approximate the dimensionless parameters of the ITER divertor very closely.

Additional information

Authors: HUTCHINSON I H, Plasma Fusion Center, MIT, Cambridge (US);VLASES G C, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(94)32 EN (1994) 19 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199510161 / Last updated on: 1995-08-22
Original language: en
Available languages: en
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