高灵敏度瞬态辐射高温计

 新研制了一台瞬态辐射高温计。它在设计上做了以下改进，采用：（1）双向色性分光镜作为分光器件，将各个通道波长的分光率提高到85%以上；（2）低输入阻抗宽频高增益（50 dB）信号放大技术做为高温计的后续电路，大大提高了高温计的探测灵敏度，同时也保证了测量系统的快速响应；（3）光谱辐照度方法做零前标定，使零前标定工作方便和可靠。以氯化钠单晶作为实例，测量了它在36.0~60.0 GPa冲击压力下的热辐射历史，获得了1 500~3 600 K冲击温度范围内的瞬态光谱辐射，高温计的响应时间优于5 ns。

A HIGH SENSITIVE TRANSIENT OPTIC PYROMETER

A new pyrometer has been developed, which uses: (a) dichroic splitters as pyrometer beamsplitters which increases the splitter efficient from about 25% (for a half-transmit half-reflect beamsplitter) to about 85%; (b) 50 dB amplifiers with an input electrical resistance less than 100 Ω and response time less than 5 ns improve the response of the original version of the pyrometer, and (c) a tungsten standard lamp as the pre-experimental calibration standard light irradiance source which makes the pre-shot calibration more convenient and reliable. As an example to test its ability, temperature measurements for single crystal sodium chloride shocked to pressures from 36 to 60 GPa were conducted, temperatures of 1 500K to 3 600 K were calculated from the recorded light radiance signals.