Density dependence of energy confinement in FTU ohmic plasma
In the last experimental campaign of FTU a complete exploration of the ohmic operation space has been completed. A database with the results of 500 plasma discharges in stationary conditions, with sawteeth activity, is available. Plasma geometry was provided by the equilibrium reconstruction from the magnetic measurements. Plasma energy content was evaluated from kinetic measurements. Electron temperature T(e) profiles have been measured by ECE analysis. Electron density profiles were obtained by the data inversion of a 5 chord DCN interferometer. Ion temperature T(i) profiles were computed by solving the ion energy balance equation, using the neoclassical ion thermal diffusivity; the comparison with the ion temperature diagnostics is discussed in detail. Z(eff) is evaluated from Spitzer resistivity without neoclassical corrections, in agreement with the results from visible bremmstrahlung; the ohmic heating deposition profile is evaluated with the same assumption. For a limited number of plasma discharges a 15 channel bolometer array provided the radial profile of the radiation losses.
Bibliographic Reference: Paper presented: 20th EPS Conference on Controlled Fusion and Plasma Physics, Lisboa (PT), July 26-30, 1993
Availability: Available from (1) as Paper EN 37544 ORA
Record Number: 199310872 / Last updated on: 1994-11-29
Original language: en
Available languages: en