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Physics > Instrumentation and Detectors

arXiv:2402.05419 (physics)
[Submitted on 8 Feb 2024]

Title:Significant noise improvement in a Kinetic Inductance Phonon-Mediated detector by use of a wideband parametric amplifier

Authors:Karthik Ramanathan, Osmond Wen, Taylor Aralis, Ritoban Basu Thakur, Bruce Bumble, Yen-Yung Chang, Peter K. Day, Byeong Ho Eom, Henry G. LeDuc, Brandon J. Sandoval, Ryan Stephenson, Sunil R. Golwala
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Abstract:Microwave Kinetic Inductance Detectors (MKIDs) have been demonstrated as capable phonon sensors when coupled to crystalline substrates, and have been proposed as detectors for next-generation rare-event searches such as for the direct detection of dark matter. These Kinetic Inductance Phonon Mediated (KIPM) detector designs, favoring large superconducting absorber volumes and high readout powers, are oftentimes limited in their sensitivity by low temperature amplifier noise introduced in the signal readout chain. We report here an effort to couple a wideband Kinetic Inductance Travelling Wave Parametric Amplifier (KI-TWPA), operated near the Standard Quantum Limit of minimal added amplifier noise, to sensors spanning a 70 MHz bandwidth at 3.5 GHz. This results in a ~5x improvement in the inferred detector energy resolution in the best sensor and highlights the potential of constructing O(100) meV resolving phonon-mediated particle detectors. We detail limitations introduced by lossy passive components, degraded RF responsivity, and microphysical noise sources like two-level systems (TLS), in achieving ultimate quantum-limited system noise levels.
Comments: 7 pages, 4 figures
Subjects: Instrumentation and Detectors (physics.ins-det); Instrumentation and Methods for Astrophysics (astro-ph.IM); High Energy Physics - Experiment (hep-ex)
Cite as: arXiv:2402.05419 [physics.ins-det]
  (or arXiv:2402.05419v1 [physics.ins-det] for this version)
  https://doi.org/10.48550/arXiv.2402.05419

Submission history

From: Karthik Ramanathan [view email]
[v1] Thu, 8 Feb 2024 05:20:22 UTC (943 KB)
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