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TT: Fachverband Tiefe Temperaturen
TT 22: Superconductivity – Poster I
TT 22.35: Poster
Monday, March 9, 2026, 18:00–20:00, P1
Optimizing the Energy Resolution of Calorimetric Low Temperature Detectors (CLTDs) by Reducing Mechanical Vibrations of the Cryogenic Setup — •Elias Eisenschmidt1,3, Hardy Weisweiler1, Andre Schirmeisen2,3, Jack-Andre Schmidt2,3, and Saskia Kraft-Bermuth1 — 1Technische Hochschule Mittelhessen, D-35390 Giessen, Germany — 2Justus-Liebig-Universität Giessen, D-35392 Giessen, Germay — 3TransMIT GmbH, D-35392 Giessen, Germany
A CLTD consists of an absorber whose temperature can be measured with a thermometer. Due to the careful consideration of absorber*s heat capacity and thermal coupling, the temperature increase of the absorber due to the impact of a particle can be directly related to the energy of said particle [1],
One limit to the energy resolution is electronic noise which is partly due to vibrations. In
this study, the required low temperature is reached using a Pulse Tube Cooler (PTC) for precooling
and a pumped 4He pot on a second stage. The CLTD*s energy resolution is noticeably
influenced by mechanical vibrations. In this work, measurements and FEM simulations
of vibrations at different cold finger designs are correlated to the energy resolution of
heavy ion CLTDs obtained from alpha particles.
[1] P. Egelhof and S. Kraft-Bermuth, Prog. Part. Nucl. Phys. 132, 104031 (2023)
DOI:10.1016/j.ppnp.2023.104031.
Keywords: CLTDs; energy resolution; vibrations