Bulletin of the American Physical Society
New England Section Fall 2023 Meeting
Friday–Saturday, October 20–21, 2023; University of Rhode Island, Kingston, Rhode Island
Session H01: Poster Session
9:40 AM,
Saturday, October 21, 2023
University of Rhode Island
Room: Engineering Fascitelli Center Hallway
Abstract: H01.00015 : Thermal Modeling Techniques forMicrocalorimeter Transition Edge Sensor*
Presenter:
Charles Veihmeyer
(University of Massachusetts Amherst)
Author:
Charles Veihmeyer
(University of Massachusetts Amherst)
Collaboration:
Ricochet Collaboration
Transistion Edge Sensor Microcalorimeters have become an extremely power-
ful tool for rare event searches in recent years (get a ref). By operating a
Superconductor in transition, we can detect fractional miliKelvin fluctuations.
The Ricochet Collaboration intends to implement an array of of such detectors,
along side a set of Germanium detectors, as a means of detecting Coherent
Elastic Neutrino Scattering. An important topic for such experiments is fully
understanding the detector, including both the electrical and thermal proper-
ties. Here we present a characterization technique for such systems. A Thermal
Model describes the energy flow in and out of the detector ensemble, which
includes the TES, the target, and all linking materials. This model is a set
of nonlinear coupled differential equations, expressing the temperature of each
component, each with its own heat capacity and thermal conductance to other
components. By modeling all the interactions, we can extract both the electri-
cal and thermal properties of this detector. One parameter that is relatively
easy to measure is the Complex Impedance. Finding an analytical solution for the complex impedance proves difficult, as it is dependent on both thermal and electrical parameters. Comparisons
between the complex impedance data and complex impedance simulations yield
well-measured detector parameters.
*This project has received funding from the NSF under Grants PHY- 2209585 and PHY-2013203.
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