Measurement of radiation temperature with high time-resolution

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