made possible by forcing the sensor bandwidth to be much smaller than the signal bandwidth. Further, intrinsic event timing resolution is estimated to be $\sim$170 $\mu$s for 3MeV recoils in the phonon detector, satisfying the event-rate requirements of large $Q_{\beta \beta}$ next-generation neutrinoless double-beta decay experiments. Quiescent bias power for both of these designs is found to be significantly larger than parasitic power loads achieved in the SPICA/SAFARI infrared bolometers.'
author:
- Matt Pyle
- Enectali
- Bernard Sadoulet
bibliography:
- 'Bib\_CRESST.bib'
title: Optimized Designs for Very Low Temperature Massive Calorimeters
---

Motivation
==========

The success of experiments that use massive very low-temperature calorimeters (e.g. CRESST [@CRESSTII_2014_LowMass], CUORE [@CUORICINO_PRC_08], EDELWEISS [@EDELWEISS_11] and CDMS [@CDMSII_HE]) in rare event searches is quite natural since phonon vibrational modes with energy above $k_{b}$T freeze out and thus do not contribute to the crystal heat capacity, leading to $T^{3}$ heat capacity scaling for semi-conducting and insulating crystals. Consequently, detectors with a large active mass and excellent energy resolution should be possible. To reiterate the utility of this natural scaling law: for a given energy deposition, a giant 1-tonne Si crystal at 10 mK will have the same temperature change as 1 g at 1 K 