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首页> 外文期刊>The European physical journal, B. Condensed matter physics >Thermodynamic investigation of an insulator irradiated by a low-energy electron beam
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Thermodynamic investigation of an insulator irradiated by a low-energy electron beam

机译：低能电子束辐照绝缘子的热力学研究

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摘要

The surface of an insulating material irradiated by a beam of low energy electrons charges positively if the yield of secondary electron is greater than unity. For such a dynamical equilibrium, the thermodynamic properties have been investigated by measuring the surface potential in response to a temperature oscillation of the material. It is shown that an oscillation amplitude of 0.4 K at 530 K induces an oscillation of the surface potential of about 0.5 volts. The frequency dependence indicates a monotonous decrease in the response with decreasing frequency, extrapolating to zero at zero frequency. We propose that this modification of the surface charge is driven by the temperature dependence of a gas of charged particles in equilibrium with the vacuum level.
机译：如果二次电子的产率大于一，则由低能电子束照射的绝缘材料的表面带正电。对于这种动力学平衡，已经通过测量响应于材料的温度振荡的表面电势来研究热力学性质。示出了在530K下0.4K的振荡幅度引起大约0.5伏的表面电势的振荡。频率依赖性表示响应随频率降低而单调下降，在零频率处外推至零。我们提出，表面电荷的这种改变是由与真空水平平衡的带电粒子气体的温度依赖性驱动的。

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