Phonon-mediated distributed transition-edge-sensor X-ray detector with deep trenches

We continue our development of a phonon-mediated distributed-TES X-ray detector. X-rays are absorbed in a large silicon or germanium crystal, and the energy is read out by four distributed TESs. This design takes advantage of existing TES technology while overcoming the difficulties of designing spatially large arrays. In this paper, we discuss three detector designs. First, a silicon detector with 220 mu m deep trenches through a 350 mu m crystal. Second, a germanium detector with 275 mu m deep trenches through a 550 mu m crystal. Finally another silicon detector with 330 mu m deep trenches through a 350 mu m crystal. We discuss energy loss mechanisms in the detector and propose a reason for the energy resolution that we observe.