Energy dissipating resistors for the ITER switching network units

•A very compact and robust design of the energy dissipating resistors has been developed for ITER.•The detailed investigation of the resistors including thermal and electric tests is described.•The suitability of the design and manufacturing processes have proved by successful tests of the resistors...

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Bibliographic Details
Published in:Fusion engineering and design 2017-11, Vol.124, p.137-140
Main Authors: Enikeev, R., Roshal, A., Sapozhnikov, K., Koptelov, G., Shilov, A., Kavin, A., Tanchuk, V., Grigoriev, S., Milani, F., Chiron, J.
Format: Article
Language:English
Subjects:
Circuit breakers
Coils
Design optimization
Discharge resistor
Dissipation
Energy dissipation
Magnetism
Plasma
Plasma currents
Plasma initiation
Power supply
Resistors
Semiconductors
Switching
Switching network
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Summary:•A very compact and robust design of the energy dissipating resistors has been developed for ITER.•The detailed investigation of the resistors including thermal and electric tests is described.•The suitability of the design and manufacturing processes have proved by successful tests of the resistors. In ITER, before each plasma pulse the poloidal magnet system will be pre-charged with maximum energy up to 8GJ. Part of this energy will be used for the gas mixture breakdown and early plasma current ramp up. This will be provided with help of the switching network units (SNU) comprising of special hybrid (mechanical and semiconductor) DC circuit breakers and resistors, which, after being inserted into the coil circuits by opening of the circuit breakers, dissipate the energy extracted from the coils. The paper describes the design of the SNU resistor and reports on the results of the tests carried out with the aim to optimize the design, demonstrate its suitability and to confirm its compliance with ITER requirements.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2017.02.078