用于冲击波温度测量的宽动态线性光学高温计

A fast pyrometer with wide dynamic linearity for shock temperature measurements

1.
National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

摘要: 采用直线聚焦型光电倍增管（PMT），研制了用于冲击波温度测量的8通道辐射高温计。改进后的PMT分压器电路使系统各通道脉冲输出线性均大于8 mA（-800 V高压），饱和光强域值达到约100 W量级，响应时间（上升沿）小于3 ns。该系统对光谱辐亮度值的相对测量不确定度为约3%，已成功用于测量50 kK以内的高温辐射历史和冲击波温度。
- 爆炸力学 /
- 冲击波温度 /
- 光电倍增管 /
- 高温计 /
- 动态线性
Abstract: 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.
- mechanics of explosion /
- shock temperature /
- photomultiplier tube /
- pyrometer /
- dynamic linearity