A Caltech Library Service

Performance of a phonon-mediated detector using KIDs optimized for sub-GeV dark matter

Wen, O. and Aralis, T. and Basu Thakur, R. and Bumble, B. and Chang, Y.-Y. and Ramanathan, K. and Golwala, S. R. (2021) Performance of a phonon-mediated detector using KIDs optimized for sub-GeV dark matter. . (Unpublished)

[img] PDF - Submitted Version
Creative Commons Attribution.


Use this Persistent URL to link to this item:


Detection of sub-GeV dark matter candidates requires sub-keV detector thresholds on deposited energy. We provide an update on a gram-scale phonon-mediated KID-based device that was designed for a dark matter search in this mass range at the Northwestern Experimental Underground Site. Currently, the device is demonstrating 6 eV resolution on the energy absorbed by the resonator. With some important assumptions, this translates to 20 eV baseline resolution on energy deposited in the substrate. We show that TLS noise dominates this energy resolution estimate. After modifying the design to mitigate TLS noise, we project 5 eV baseline resolution on energy deposited in the substrate (1.5 eV on energy absorbed by the resonator) for an amplifier-white-noise-dominated device. Finally, we present a clear path forward to sub-eV thresholds, which includes installation of a quantum-limited superconducting parametric amplifier and adjustments to the material makeup of our resonators.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Basu Thakur, R.0000-0002-3351-3078
Chang, Y.-Y.0000-0002-6441-980X
Golwala, S. R.0000-0002-1098-7174
Additional Information:Attribution 4.0 International (CC BY 4.0). We acknowledge the support of the following institutions and grants: NASA, NSTGRO 80NSSC20K1223 Department of Energy, DE-SC0011925F Fermilab, LDRD Subcontract 672112
Group:Astronomy Department
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0011925F
Fermi National Accelerator Laboratory672112
Subject Keywords:kinetic inductance detectors, dark matter, phonons, two-level system noise
Record Number:CaltechAUTHORS:20211214-190049765
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:112426
Deposited By: George Porter
Deposited On:15 Dec 2021 16:57
Last Modified:15 Dec 2021 16:57

Repository Staff Only: item control page