Speaker
Description
For aboveground experiments, cosmic muons are common background sources. The ECHo experiment is designed for the determination of the effective electronneutrino-mass by the analysis of the endpoint region of the $^{163}$Ho EC spectrum. The fraction of events in the ROI below the $Q_{EC}$ value is of the order of $10^{-12}$. Thus, the background in that region requires a precise understanding and possible reduction. We present the role of muon-related events in metallic magnetic calorimeter (MMC) arrays used for ECHo and discuss the use of an active muon veto. Muon-related events are used to study the pulse shape and multiplicity in array pixels. We report on different families of muon-related events in MMC pixels and analytical identification and eliminatation methods. The spectrum of muon-related events shows a decreasing energydistribution with energy. Presently, we conclude that muon-related background is negligible in the ROI.
Mini-abstract
Muonic backgound source in the ECHo experiment neglible, according to pulse shape analysis.
| Experiment/Collaboration | ECHo experiment |
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