超快多路温度计的新设计

项目名称： 超快多路温度计的新设计

项目编号： No.11205225

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学II

项目作者： 雷瑜

作者单位： 中国科学院近代物理研究所

项目金额： 29万元

中文摘要： 等离子体作为宇宙中广泛存在的物质第四态，其热力学和流体力学特性研究受到了广泛的关注，而温度作为其中一个重要的状态参量，对它的测量显得尤为重要。本项目旨在设计一种快响应的多路色温度计，来对等离子体进行动态温度的实时诊断。这种温度计采用极低分辨的成像光谱仪分光替代传统的滤光片，可以同时在其焦平面上得到靶物质的辐射光谱分布，两维光纤阵列放置在成像光谱仪的焦平面上，横向得到靶物质的光谱信息，纵向得到靶物质的位置信息；低的光谱分辨可以使采谱范围足够宽、光通量足够大，这不仅保证了测温的精确性，同时兼顾其灵敏度；而且可以首次实现多点同时测量，这点非常适合于离子束驱动产生的"大体积"高能量密度物质的温度诊断。标准光源用来对该温度计进行刻度，基于相关的辐射模型得到物体表面的温度分布。课题组成员已经成功地利用传统滤光片搭建了两路温度计，且做了大量的前期工作，有望通过系统研究与测试使这一课题得到突破。

中文关键词： 等离子体；高温计；光谱仪；辐射模型；

英文摘要： Plasma as the fourth state of the substance widespread in the universe, its thermodynamic and hydrodynamic properties has aroused considerable concern, the temperature as one of the key parameter of plasma state, its diagnosis is very important. The task aims to design a ultrafast muilti-channel pyrometer, dynamically diagnosing temperature of plasma. Imaging spectrometer discrimination with extremely low resolution is a new technique for pyrometer comparing with traditional filters. Radiation spectral distribution generated by target matter is stimultanely obtained in the focal plane of the spectrograph, which is placed a two-dimension optical fiber array showing spectral and location information of the target matter in horizontal and vertical, respectively. Low spectral resolution which has broad enough of spectra range and enough large enough of luminous flux does not only ensures the accuracy of the temparature, but also taking into account the sensitivity. Besides, simultaneous measurement of multiple locations is achieved, it is very suitable for the temperature diagnostic of the "large volum" high energy density matter driven by ions beam. The pyrometer is calibrated by standard light source,and the temperature distribution of target surface is obtained by different spectrum radiation models. Two-channel

英文关键词： plasma；pyrometer；spectrometer；radiation model；