✦ LIBER ✦
Evaluation of magnet losses from He II temperature measurements in TORE SUPRA
✍ Scribed by J.-L Duchateau; Ph Riband
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 300 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
The toroidal field system of the French tokamak TORE SUPRA is cooled by superfluid helium. A particular behaviour has been observed during safety discharges in one of the 18 coils (BT13) of the system, in relation to a higher level of He II temperatures. Thanks to external temperature sensors and to the Gorter Mellink conduction in the cooling channels, it has been possible to make a thermal evaluation using a calorimetric method. An hypothesis for the defect inside the coil is presented and discussed taking into account a campaign of safety discharges performed in Summer 1993.