Studies of fuelling rates of CO, CH(4) and oxygen in the TEXTOR tokamak
Impurity gases have been introduced into TEXTOR at well defined rates to study the fuelling process and the effect on the overall energy balance. It is found that carbon and oxygen, introduced as CO and CH(4) gases, have radically different behaviour. Oxygen has a high recycling coefficient of approximately 0.99 whereas carbon has a low recycling coefficient of approximately 0.3. The radial position of the gas source was varied from the wall to the limiter radius but this made little difference to the effect on the global plasma parameters. For very high influxes of both impurities drastic changes in the edge plasma were observed and disruptions could be induced.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 196-198 (1992) pp. 199-203
Record Number: 199310389 / Last updated on: 1994-11-29
Original language: en
Available languages: en