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TJ-II:Radiation asymmetries and potential variations: Difference between revisions
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TJ-II:Radiation asymmetries and potential variations (view source)
Revision as of 14:07, 6 March 2018
, 6 March 2018→Description of required resources
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Other constraints regarding the desired experimental conditions are: | Other constraints regarding the desired experimental conditions are: | ||
*The | *ECH is the main and only heating scheme that will be employed. Accessing the regimes detailed in the following line will be realized by the usage of different power and off-axis heating when necessary. | ||
*A total of 20 discharges are estimated to be the minimum required. | |||
* Good stationarity of plasma parameters at the instant where the impurities are injected is required in order to extract the stationary background emissivity from that produced by the injected impurity. Hence the study shall preferably be perform in ECRH plasmas. | *The injection of impurities by means of LBO or puffing is required, in order to track the impact and evolution of the bolometry radiation signals, and correlated with the measurement and predictions of the potential variations and radial electric field. | ||
*Accessing different absolute values and regimes <math>E_{r}</math> is essential. These regimes can be roughly referred to as "high ion root <math>E_{r}</math>", "low ion root <math>E_{r}</math>" and the same for electron root conditions. 2 discharges per regime are required in order to characterize <math>E_{r}</math> at different positions over the same flux surface. | |||
*Reproducing some of these regimes in two different configurations (high-iota and standard), where changes in the the sign of <math>E_{r}^{Left}-E_{r}^{Right}</math> have been observed, is planned. | |||
*Good stationarity of plasma parameters at the instant where the impurities are injected is required in order to extract the stationary background emissivity from that produced by the injected impurity. Hence the study shall preferably be perform in ECRH plasmas. | |||
== Preferred dates and degree of flexibility == | == Preferred dates and degree of flexibility == | ||