R&D of a strain monitoring system for the EAST tungsten divertor

In order to monitor thethermomechanical and electromagnetic responses of the structural components, a strain sensor system has beenproposed to be applied in the EAST device. To develop this technology, two initial experiments on the thermalstrain measurement of a tungsten divertor module of the EAST have been carried out using electrical strain gagesand optical strain sensors.

However, some engineering issues were exposed during the experiments. Under thiscondition, all these issues are summarized and discussed this time. Moreover, a comparison between the twotechniques has been made when applied in the tungsten divertor.