DoubleTES detectors to investigate the CRESST low energy background: results from above-ground prototypes

Abstract

In recent times, the sensitivity of low-mass direct dark matter searches has been limited by unknown low energy backgrounds close to the energy threshold of the experiments known as the low energy excess (LEE). The CRESST experiment utilises advanced cryogenic detectors constructed with different types of crystals equipped with Transition Edge Sensors (TESs) to measure signals of nuclear recoils induced by the scattering of dark matter particles in the detector. In CRESST, this low energy background manifests itself as a steeply rising population of events below 200 eV. A novel detector design named doubleTES using two identical TESs on the target crystal was studied to investigate the hypothesis that the events are sensor-related. We present the first results from two such modules, demonstrating their ability to differentiate between events originating from the crystal's bulk and those occurring in the sensor or in its close proximity.

10 pages, 13 figures

References in corpus (8)

• Searching for low-mass dark matter particles with a massive Ge bolometer operated above-ground
• SENSEI: Direct-Detection Constraints on Sub-GeV Dark Matter from a Shallow Underground Run Using a Prototype Skipper-CCD
• Low-Mass Dark Matter Search with CDMSlite
• Commissioning Run of the CRESST-II Dark Matter Search
• First Constraints from DAMIC-M on Sub-GeV Dark-Matter Particles Interacting with Electrons
• Results on sub-GeV Dark Matter from a 10 eV Threshold CRESST-III Silicon Detector
• Latest observations on the low energy excess in CRESST-III
• Observation of a low energy nuclear recoil peak in the neutron calibration data of the CRESST-III Experiment

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• Aluminum Relaxation as the Source of Excess Low Energy Events in Low Threshold Calorimeters
• A Transition Edge Sensor Operated in Coincidence with a High Sensitivity Athermal Phonon Sensor for Photon Coupled Rare Event Searches
• Spontaneous generation of athermal phonon bursts within bulk silicon causing excess noise, low energy background events and quasiparticle poisoning in superconducting sensors
• Binary Classification of Light and Dark Time Traces of a Transition Edge Sensor Using Convolutional Neural Networks
• Prospect of the NUCLEUS Experiment at Chooz for Coherent Elastic Neutrino-Nucleus Scattering and New Physics Searches