Abstract
Beam power measurement usually adopts water flow calorimetry (WFC) for neutral beam injector. In this article a calculation model of beam power for EAST neutral beam injector was given basing on thermocouples installed in the calorimeter plate. In order to obtain calculation model: (1) the heat flux of the surface of beam stopping elements was calculated using heat transfer science, (2) the processing method of data obtained from the thermocouple was given, (3) mathematic derivations of beam power is given basing on theory of Gaussian distribution. The model could point another way to beam power measurement of EAST neutral beam injector besides WFC.
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