周期驱动接触电势差的谐振测量
Resonance measurement of periodically driven contact potential difference
摘要：
本文介绍了一种用于测量调制光引起的接触电势差振荡的新型石英谐振装置。特别注意的是，石英谐振器的建设性电容的负电容的补偿。以这种方式，石英谐振滤波器非常窄，同时具有极小的总带宽，这显著提高了信噪比。对于金属，该器件给出了功函数的温度依赖性，并打开了基于该温度导数创建成像光谱的前景。所提出的装置可用于基于功函数的温度导数来创建金属材料的缺陷检测。
英文摘要：
A new type of quartz resonance device for measurements of oscillations of the contact potential difference induced by modulated light is described. Special attention is devoted to the compensation of the constructive capacitance of the quartz resonator by a negative capacitance. In such a way the the quartz resonance filter is very narrow and at the same time has extremely small total bandwidth, which improves significantly the signal to noise ratio. For metals, this device gives the temperature dependence of the work function and opens perspectives for creation of imaging spectroscopy based on this temperature derivative. The proposed device can be used for creation of defectoscopy of metallic materials based on the temperature derivative of the work function.
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