[en] In this paper, I shall give you some indication of the MAKOKOT code and of how it is used for effective simulation. Three main parts are distinguished in MAKOKOT: 1) transport equations for electrons and light ions coupled with Maxwell's equations, 2) neutral evolution, 3) impurity evolution

[en] This paper reviews the status of the experiments at Jutphaas at the time of the Varenna meeting in September 1977. As general references the Annual Status Reports of 1976 and 1977 are recommended. The experimental programme of the Instituut voor Plasmafysica at Jutphaas, The Netherlands, follows three main lines: I. Equilibrium and stability of high-β plasmas in the screw-pinch configuration both in circular and racetrack cross-sections. Main experiment 'SPICA'. II. Turbulent skin heating of toroidal plasmas. Main experiment TORTUR II, under construction. III. Cold plasma Blanket Research as a means to protect the wall of a reactor against fast neutrals from the hot core. Main experiment RINGBOOG II, under construction. The diagnostics and data acquisition are performed within the three groups

[en] This report explains briefly the physical aspect and outline of the Heliotron E device. The index is as follows. (1) Outline of the Heliotron E (a) machine parameters, (b) physical aspects and objects, (c) time schedule, (d) power supply. (2) Research and development. (3) Pictures of the real size model

[en] In the so-called slide-away regime observed in the Alcator and Microtor devices the following phenomena occur: a) a strong deformation of the electron distribution function; b) the enhancement of the radiofrequency emission in the range ω>=ωsub(pi); c) a remarkable increase of transverse ion temperature for increasing values of the streaming parameter XI=u/vsub(the) where u and vsub(the) are the average electron toroidal velocity and the electron thermal velocity respectively. We consider here the quasi-linear evolution of the system, assuming, for simplicity, fixed maxwellian distributions for ions and trapped electrons. This allows the computation of the energy transferred to the ions and of the evolution of the wave spectrum

[en] The aim of the FT experiment is to produce a plasma with a wide range of parameters in order to study various regimes and their scaling laws

[en] Recent measurements of the emitted radiation from toroidal plasmas have revealed the presence of non-thermal radiation at the electron plasma frequency. Spectra obtained in T.F.R., in experimental conditions where the emission at the harmonics of the central electron cyclotron frequency ωsub(ceo) is close to thermal, exhibit an anomalous peak at a frequency ω'< ωsub(ceo), with an amplitude which can be as high as 40 times the black-body level. This peak shows up for instance on spectra at different times in the discharges. Some of the observed characteristics of this emission are given

[en] The Joule current inhibition which occurs in the low filling pressure regime in the Heliotron D device is investigated. The Joule current inhibition follows the phenomena in which the plasma density decreases and the Joule current shrinks to the central core of the plasma. The primary cause for this phenomena is thought to be due to the lack of recycling of the neutral gas from the wall. Therefore, the inhibition is suppressed by the supplementary puff injection of the neutral gas. This means that the injection of the neutral gas is important to control the profile of the electron temperature and the Joule current. Some relation with the major disruptive instability of the Tokamak devices are assumed

[en] The stability of the boundary regions of gas insulated plasmas are important for two reasons. Firt, large pressure and density gradients are likely to arise across the boundaries on account of plasma neutral gas interaction effects. Second, minimum-average-B and shear are expected to become less effective due to insufficient magnetic line tying and the small localization regions of the modes considered respectively. In this communication we discuss the joint effects of plasma neutral gas interaction and resistivity on the stability of electrostatic current convective modes. Within specific parameter ranges strong stabilizing effects are introduced

No abstract available

[en] Resistive steady states of an elliptical cross-section cylindrical plasma in a Tokamak-like regime are studied using a single fluid mhd model with source functions. Two examples are considered, an isothermal plasma with constant resistivity, and a plasma with a temperature gradient and Spitzer resistivity. Instead of specifying the source function we calculate it by assuming that the functional form of the velocity of diffusion of plasma across the magnetic field is Spitzer-like. The calculated source functions correspond to what one would expect with neutral injection