A fast pyrometer with wide dynamic linearity for shock temperature measurements

By adopting linear-focused photomultiplier tubes (PMT), an eight-channel radiation pyrometer was developed for shock temperature measurements. The dynamic linearity in each channel of the pyrometer, using the developed voltage divider circuit, exceeds 8 mA at the work voltage of -800 V. The saturated light intensity is better than the level of 100 W and the response time is less than 3 ns. The relative uncertainties of spectral radiances, which are measured by the pyrometer, are about 3% .The pyrometer was successfully used to measure the radiance history and shock temperature within 50 kK.