Urunchi, China
Urunchi, China

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Wang X.,Northwest Institute of Nuclear Technology | Wang X.,63655 Unit of PLA | Wang J.,Northwest Institute of Nuclear Technology | Wang J.,Xi'an Jiaotong University | And 4 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2013

Researches on responses of an n-type silicon bar fixed in a rectangular waveguide to high power terahertz pulse have been carried out for the 0.3~0.4 THz band. The distribution of electromagnetic field components, voltage standing-wave ratio (VSWR) in the waveguide, and the average electric field in the n-type silicon bar is determined by means of a three-dimensional finite-difference time-domain method. By adjusting several factors, such as the length, width, height and the specific resistance of the silicon bar, a novel project of a sensor that can be used as measurement device for high power terahertz pulse directly is presented. The relative sensitivity of the sensor is about 0.509 kW-1, its fluctuation is in the range of 14%, and its VSWR is no more than 1.34.


Liu W.-F.,63655 Unit of PLA | Xie Y.-J.,63655 Unit of PLA | Chen R.-W.,63655 Unit of PLA | Jing C.-Y.,63655 Unit of PLA
Guangdian Gongcheng/Opto-Electronic Engineering | Year: 2012

Zenith luminance is an important parameter of sky background radiation. In order to acquire the zenith luminance characteristic, the zenith luminance was measured with sky background measurement system at somewhere in Xinjiang. Experimental data was analyzed. The result indicated that there was a certain relationship between the zenith luminance and sun high angle in sunshiny days. A relationship formula between the zenith luminance and sun elevation in sunshiny days was proposed. The validity of the formula was verified through the comparison of the calculation data with the experimental value. This relationship formula can be used to analyze the zenith luminance in real-time in sunshiny days. It is valuable to research sky background radiation luminance.

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