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Abstract

The ion temperature of 1 keV as measured by energy analysis of cx neutrals has been confirmed by measurements of the Doppler broadening of the O-VIII line both perpendicular and parallel to B, and the neutron flux from thermal D-D reactions. For overall energy balance confinement of the fast particles has to be improved by a radial electric field of lost particles. A rotational velocity of 20-30 km/s from the Doppler shift of a OV line corresponds to a drop of about 1 kV. Lost particles have been detected by laser induced fluorescence of the sputtered Fe atoms. The stationary hydrogen spectrum agreed with calculations assuming collisional slowing down of the injected particles. The measured neutron flux depends on the collisional slowing down time as expected. The transient response of the neutron and cx particle flux at switching off the deuterium injector have been measured. For plasma densities and electron temperatures from 3.5x10**13 cm**-3, 620 eV to 9x10**13, 360 eV collisional slowing down has been found. Low harmonics of the ion cyclotron frequency have been observed by probe measurements. A sudden increase and fast decay has been seen at the beginning of the injection as expected by the theory of unstable wave excitation.

Additional information

Authors: W VII A TEAM, MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);NI TEAM, MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);JUNKER J MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY), MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY)
Bibliographic Reference: 5TH INTERNATIONAL WORKSHOP ON STELLARATORS, SCHLOSS RINGBERG, BAVARIA (GERMANY), SEPT. 24-28, 1984 VOL. I, PP. 179-189, EUR 9618 EN (1985) FS, VOL. I AND VOL. II, 787 P., BFR 3500 (BOTH VOLUMES), EUROFFICE, LUXEMBOURG, POB 1003
Record Number: 1989124117700 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en