Systems and methods for reducing or eliminating timing errors in a quantum key distribution system are disclosed. A heat insulation device for reducing the transmission of heat from the high-temperature side to the low-temperature side is provided between the combustorturbine and the compressor. A first radiator is formed in a spiral shape inside or on the substrate, and includes at least one spiral radiating part. This photosensitive paste layer is plotted by a laser beam so as to form a plotted area.