A serial scan path communication architecture includes a plurality of circuits, some of which may include a memory. The starter comprises a glow fuse, a high-temperature conductor that is serially connected to the glow fuse, and a resetting bimetal switch which is serially connected to the glow fuse and the high-temperature conductor and is in thermal contact therewith. A detachable insert is suspended in the outer container and thus floats in the outer container above the outer container’s bottom. A blower or fan forces air into the air inlet plenum. The location of the grooves is calculated based on two conditions: the first one being that the path-difference between adjacent grooves should be an integral multiple of the wavelength in the medium and the second one being specific for a particular design goal of a curved-grating spectrometer.