Low Temperature Detectors for Neutrino Physics

Low temperature microcalorimeters can be designed for high energy X-ray spectroscopy. Such detectors may have an impact in many frontier fields like have astrophysics, material analysis, nuclear safety and diagnostic, archaeometry, and quantum communication.

We have prepared many prototypes of X-ray detectors using Germanium NTD, Silicon implanted thermistor, and Transition Edge Sensors.

1. B Alpert, et al. High-resolution high-speed microwave-multiplexed low temperature microcalorimeters for the HOLMES experiment. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS 79, 2019. URL, DOI
2. A Alessandrello, et al. High energy resolution bolometers for nuclear physics and x-ray spectroscopy. PHYSICAL REVIEW LETTERS 82(3):513-515, 1999. DOI
3. A Alessandrello, et al. Fabrication and low-temperature characterization of Si-implanted thermistors. JOURNAL OF PHYSICS D-APPLIED PHYSICS 32(24):3099-3110, 1999. DOI

The Mn Kα doublet measured with two Germanium NTD thermistors coupled to Tin absorbers. The best results have been obtained with Tin absorbers (about 250x250x25 μm3).		HOLMES prototype microcalorimeter with ΔEFWHM=4.5±0.1eV. The TES is coupled to a Au absorber (200x200x2 μm3). The dectors are read-out by microwave multiplexing.