Abstract
We present the design and characterization of a cryogenic phonon-sensitive 1-gram Si detector exploiting the Neganov-Trofimov-Luke effect to detect single-charge excitations. This device achieved 2.65(2) eV phonon energy resolution when operated without a voltage bias across the crystal and a corresponding charge resolution of 0.03 electron-hole pairs at 100 V bias. With a continuous-readout data acquisition system and an offline optimum-filter trigger, we obtain a 9.2 eV threshold with a trigger rate of the order of 20 Hz. The detector's energy scale is calibrated up to 120 keV using an energy estimator based on the pulse area. The high performance of this device allows its application to different fields where excellent energy resolution, low threshold, and large dynamic range are required, including dark matter searches, precision measurements of coherent neutrino-nucleus scattering, and ionization yield measurements.
| Original language | English (US) |
|---|---|
| Article number | 032010 |
| Journal | Physical Review D |
| Volume | 104 |
| Issue number | 3 |
| DOIs | |
| State | Published - Aug 1 2021 |
Funding
We would like to thank Martin Huber for providing the SQUIDs used in these measurements, Suhas Ganjam for help in initial detector mask design, and Jillian Gomez for help with initial commissioning of the NEXUS cryostat. We would also like to thank Paul Brink, Blas Cabrera, Sunil Golwala, Belina von Krosigk, and Betty Young for feedback on the draft their support of this work. We gratefully acknowledge support from the U.S. Department of Energy (DOE) Office of High Energy Physics and from the National Science Foundation (NSF). This work was supported in part under NSF Grants No. PHY-1809730, as well as by the Deutsche Forschungsgemeinschaft (DFG) under Project No. 420484612 and Germanys Excellence Strategy—EXC 2121 “Quantum Universe” 390833306. Parts of this document were prepared using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. Pacific Northwest National Laboratory (PNNL) is operated by Battelle Memorial Institute for the U.S. Department of Energy under Contract No. DE-AC05-76RL01830.
ASJC Scopus subject areas
- Nuclear and High Energy Physics