This study analyzes a non-threshold electromagnetic radiation detector, which is a current-carrying superconducting film with a normal domain. The normal domain is formed as a result of heating a portion of the film by an external heat source, and Joule heat in the domain. The detection mechanism consists in the fact that the heating of the film by electromagnetic radiation leads to an increase in the length of the normal domain, and thereby to an increase in voltage across the film. The authors have calculated the sensitivity of the detector under consideration, and determined the conditions under which this sensitivity reaches its maximum.

中文翻译：

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具有法向域的超导光子探测器的灵敏度

本研究分析了一种无阈值电磁辐射探测器，它是一种具有法向域的载流超导薄膜。法向域是通过外部热源加热膜的一部分以及该域中的焦耳热而形成的。检测机制在于电磁辐射对薄膜的加热导致正常域长度的增加，从而导致薄膜两端的电压增加。作者计算了所考虑的探测器的灵敏度，并确定了该灵敏度达到最大值的条件。