A first step to a joint stellarator database
A first step to an international stellarator database on global confinement data is reported. The structure of the database is presented and a list of the plasma parameters covered is included. The principal problems encountered in stellarator databases are discussed on the basis of ATF and W7-AS data. A simple comparison with tokamak data is made in terms of LHD and tokamak L-mode scaling expressions. Furthermore, some useful relations are derived to convert scaling expressions from machine to physics variables. Constraints deduced from these relations are used to compare regression expressions which follow Bohm-like or gyro-Bohm-like scalings. Finally, it is demonstrated that in the frame of linear regression analysis it is technically not possible to deduce a reliable dependence of the energy confinement time on the plasma energy.
Bibliographic Reference: Report: IPP 111/195 EN (1994) 14 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 199410510 / Last updated on: 1994-11-28
Original language: en
Available languages: en