Aerodynamic laser-heated contactless furnace for neutron scattering experiments at elevated temperatures
Aerodynamic laser-heated contactless furnace for neutron scattering experiments at elevated temperatures
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用于高温中子散射实验的气动激光加热非接触炉
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
G. Derbyshire
中科院分区：
文献类型：
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作者：
C. Landron;L. Hennet;J. Coutures;T. Jenkins;C. Alétru;N. Greaves;A. Soper;G. Derbyshire
传统的辐射炉需要在高温下促进污染的样品容器，并且通常需要限制衍射和散射测量所需的入口和出口立体角的窗口。本文介绍了一种用于高温中子散射实验的气动悬浮激光加热无窗无接触炉。报告了在高达1900 °C的温度下，晶体和非晶氧化物的初始实验数据，使用了散斑中子源ISIS和我们的激光加热空气动力学悬浮器。 热膨胀系数和径向分布函数的准确再现已经获得，证明中子散射方法的气动悬浮方法的实用性。
Conventional radiative furnaces require sample containment that encourages contamination at elevated temperatures and generally need windows which restrict the entrance and exit solid angles required for diffraction and scattering measurements. We describe a contactless windowless furnace based on aerodynamic levitation and laser heating which has been designed for high temperature neutron scattering experiments. Data from initial experiments are reported for crystalline and amorphous oxides at temperatures up to 1900 °C, using the spallation neutron source ISIS together with our laser-heated aerodynamic levitator. Accurate reproduction of thermal expansion coefficients and radial distribution functions have been obtained, demonstrating the utility of aerodynamic levitation methods for neutron scattering methods.