Scenario development for DT operation at JET

Scenario development for DT operation at JET

Scenario development for DT operation at JET 150 150 amit lakhani

The JET exploitation plan foresees D-T operations in 2019-2020. With respect to the first D-T campaign in 1998, when JET was equipped with a carbon wall, the experiments will be conducted in presence of a beryllium-tungsten ITER-like wall and will benefit from an extended and improved set of diagnostics and higher available additional heating power. Among the challenges presented by operations with the new wall, there are a general deterioration of the pedestal confinement (not completely explained yet), the risk of heavy impurity accumulation in the core, which, if not controlled, can cause the radiative collapse of the discharge and the requirement to protect the more vulnerable divertor from excessive heat loads, which may damage it permanently. Therefore, an intense activity of scenario development has been undertaken at JET during the last three years to overcome these difficulties and prepare the plasmas needed to demonstrate stationary high fusion performance and clear alpha-particle effects. In the remainder of this synopsis we will highlight the main achievements of the scenario developed, both from an operational and plasma physics point of view.

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27th IAEA Fusion Energy Conference, Ahmedabad, India, 22-27 October 2018