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(CT/P-02) A Two-term Model of the Confinement in ELMy H-modes Using the Global Confinement and Pedestal Databases
J.G. Cordey1),
J.A. Snipes2),
M. Greenwald2),
A. Hubbard2),
F. Ryter3),
O.J.W.F. Kardaun3),
J. Stober3),
W. Suttrop3),
L.D. Horton3),
M. Valovic1),
S.J. Fielding1),
A. Sykes1),
A. Dnestrovskij1),
M. Walsh1,
J.C. DeBoo4),
T.N. Carlstrom4),
T.H. Osborne4),
G. Bracco5),
E. Righi6),
K. Thomsen6),
D. McDonald6),
Y. Miura7),
T. Takizuka7),
T. Fukuda7),
Y. Kamada7),
K. Shinohara7),
K. Tsuzuki7),
H. Urano7),
T. Hatae7),
S.M. Kaye8),
C. Bush9),
Y. Martin10),
A. Cote11),
G. Pacher11),
J. Ongena12),
S. Lebedev13),
A. Chudnovskiy14),
M. Sugihara15),
G. Janeschitz16)
1) UKAEA Association Euratom, Culham, UK
2) MIT Plasma Science and Fusion Center, Cambridge, MA, USA.
3) Max-Planck Inst. für Plasmaphysik, Garching
4) General Atomics, San Diego, CA, USA
5) Associazione Euratom-ENEA sulla fusione, Frascati, Italy
6) EFDA-JET, Culham, UK or Garching, Germany
7) Naka Fusion Research Establishment, Japan Atomic Energy Research Institute,
Naka-machi, Naka-gun, Ibaraki-ken, Japan
8) Princeton Plasma Physics Laboratory, Princeton, NJ, USA
9) Oak Ridge National Laboratory, Oak Ridge, TN, USA
10) EPFL/CRPP Association Euratom, Lausanne, Switzerland
11) Centre Canadien de Fusion Magnetique, Varennes, Quebec, Canada
12) LPP/ERM-KMS, Association EURATOM-Belgian State, Brussels, Belgium
13) A F Ioffe Institute, Russian Academy of Sciences, St Petersburg, Russia
14) Nuclear Fusion Institute, Russian Research Centre Kurchatov Institute,
Moscow, Russia
15) ITER Joint Work Site, Naka, Japan.
16) FZK-PL-Fusion, Karlsruhe, Germany
Abstract. The ITPA Confinement and Pedestal Database groups have joined
forces to assemble a common database of pulses containing both pedestal and
core energy data. The scaling of the pedestal energy with respect to both
the engineering parameters current, power, major radius etc. and the
dimensionless physics parameters, normalised Larmor radius, collisionality
etc. has been determined. The large ELMy H-mode database is then used to
determine the scaling of the core plasma which is found to be approximately
pure gyro-Bohm. A two term model consisting of both a core and pedestal
contribution is developed, which is found to fit the data as well as the
conventional one term model. Predictions for the energy content of the
pedestal and core in ITER are presented.
IAEA 2003