AI 中文总结
介绍用于低温探测器校准的低温可切换电子源原型，通过光电发射产生电子并加速，用TES微热量计阵列检测，成功观察到相关信号，可据此开发低温探测器校准方法。
AI 中文摘要
我们展示了一个紧凑的、可切换的低温电子源原型，其能量范围为100 eV至300 eV，并在概念上可扩展到任意能量范围。电子通过光电发射产生，由低温恒温器内的LED照射两个400纳米厚的商用铝层引发，随后被高达300 V的电压加速。使用为X射线探测器设计的过渡边缘传感器（TES）微热量计阵列进行检测，成功观察到与源产生的电子一致的信号，速率约为1 Hz，效率约为10⁻¹⁴ e⁻/γ。该原型的一个潜在应用是开发基于电子的产生、加速和倍增，随后将其转换为高能光子的低温探测器校准方法。
英文摘要
We present the realization of a prototype of a compact, switchable electron source operating at cryogenic temperatures, demonstrated at energies ranging from 100 eV to 300 eV, and conceptually extendable to an arbitrary energy range. The electrons are produced via photoelectric emission, induced by a LED illuminating two 400~nm-thick commercial aluminum layers inside a cryostat, and are subsequently accelerated by a voltage of up to 300~V. Detection is carried out with an array of transition-edge sensor (TES) microcalorimeters designed for X-ray detectors, where we successfully observe signals consistent with electrons produced at the source at rates of $\gtrsim$1~Hz and with an efficiency of $\gtrsim 10^{-14}\ e^-/γ$. One of the potential applications of this prototype is the development of a calibration method for cryogenic detectors, based on the generation, acceleration, and multiplication of electrons, followed by their conversion into high-energy photons.
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