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A methodology for measuring instantaneous thermal loads on a portion of the FTU poloidal limiter has been developed, based on the processing of experimental data recorded by thermocouples and an infrared detector, and the comparison of measurements with the results of a numerical simulation of heat transfer in the limiter portion under investigation. An original experiment of infrared thermography was conducted. The de-convolution of the time-resolved limiter surface temperature provides time-resolved thermal loads. The results show that the time average of the instantaneous thermal loads agrees with the average thermal loads predicted by thermocouple measurements. Time fluctuations in the observed thermal loads are correlated with the corresponding time fluctuations of metallic impurity contents. Temperature and thermal load measurements show that the condition of surface melting can be reached in the portion of limiter under investigation.

Additional information

Authors: FRANZONI G, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Report: ENEA RT/ERG/FUS/93/54 IT (1993) 40 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
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