高时间分辨辐射温度测量技术
Measurement of radiation temperature with high time-resolution
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摘要: 通过对影响测量辐射温度时间分辨因素的研究，得出影响测量时间分辨的主要因素是系统的偏压、电缆的长度与带宽、衰减头的带宽和示波器的带宽与采样率。通过提高系统的偏压（3 kV）、缩短电缆的长度（2 m）、使用高带宽的衰减头（18 GHz）和高带宽（6 GHz）和2×1010／s采样率的示波器，在Silex-Ⅰ激光装置上进行系统的时间分辨测量，系统的上升时间为130 ps，时间分辨为215 ps。利用该系统，在上海神光Ⅱ装置开展的实验中，时间分辨好于215 ps，观测到了激光脉冲调整后辐射温度随时间的变化。Abstract: By analyzing time resolution of radiation temperature measurement, the main factors of systemic bias, cable’s length and bandwidth, attenuator’s bandwidth, oscillograph’s bandwidth and sampling rate have been determined. To improve the systemic time resolution, the system bias was increased to 3 kV, the cable length was shortened to 2 m, an attenuator with higher bandwidth(18 GHz) and an oscillograph with higher bandwidth(6 GHz) and sampling rate(22×1010／s) were used. Then, in Silex-Ⅰ laser , the systemic time resolution was measured, the systemic risetime is 130 ps, and the time resolution is 215 ps. Using this system, in the experiment on Shenguang-Ⅱ facility in Shanghai, the radiation temperature measurement of cavity target was carried out, and time resolution better than 215
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