Fabrication of the vacuum vessel of the Spanish stellarator TJ-II

Botija, J.; Blaumoser, M.; Cal, E. de la; Díaz, Antonio; Tabarés, F.L.; Molleta, L.; Rigadello, D.; Maso, S. Dal; Bevilacqua, G.

doi:10.1016/b978-0-444-82220-8.50160-6

Cited by 4 publications

(1 citation statement)

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“…The TJ-I1 vacuum vessel [2] is composed of 32 sectors and 32 rings distributed into almost four equal periods of 90" each. The sectors have a roughly oval shape with a helicoidal element (groove) and ports of different types.…”

Section: Baking Testmentioning

confidence: 99%

Baking of the vacuum vessel prototype of the Spanish Stellarator with a control system based on neural network

Botija

Alonso

Blaumoser

et al.

Proceedings of 16th International Symposium on Fusion Engineering

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To bake uniformly, up to IS0 "C, the vacuum vessel of the Spanish Stellarator TJ-I1 represents a dil'ficult task to be deinonstrated. In order to study the temperature distribution in the vessel, a prototype ol' this vacuum vessel. mounted in a stainless steel structure, has been heated by means of electrical panels and eddy currents. The induction heating system is provided applying 498 A/l 1.7 V at 50 Hz to the toroidal field coil located i n the middle of the vessel prototype. Practically, this system only heats adequately the rings and poorly t h e so called "groove" o f the vacuum vesscl. On the contrary, the electrical heaters, with a power density of 0.5 W/cm2, heat the external part of the sectors and ports. Thc high density of temperature sensors ensures the uniformity o f the heating process during the long heating cycles, making advisable a fault-tolerant control system based on Artificial Neural Networks (ANN'S) that implcmcnts the control loop to regulate and protect both heating systems. This paper deals with the results of this experiment.

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Section: Baking Testmentioning

confidence: 99%