In this study, the improvement of the measurement accuracy of the discharge field temperature by using the high-speed camera is investigated. In the method, the temperature measurement accuracy depends on the accuracy of the shock wave local velocity. The local velocity accuracy can be determined by the spatial resolution of the high-speed camera. Therefore, in order to improve the accuracy, the high performance camera is one of the promising method. As a result, by using the three times finer spatial resolution camera, the temperature accuracy became three times higher compared to the previous results. This result suggests that the method is expected to extend to the future development of the simultaneous measurement of the vorticity and the temperature.
Kawai et al. (Wed,) studied this question.