Impact of ADC non-linearities on the sensitivity to sterile keV neutrinos with a KATRIN-like experiment

Abstract

ADC non-linearities are a major systematic effect in the search for keV-scale sterile neutrinos with tritium $\beta$-decay experiments like KATRIN. They can significantly distort the spectral shape and thereby obscure the tiny kink-like signature of a sterile neutrino. In this work we demonstrate various mitigation techniques to reduce the impact of ADC non-linearities on the tritium $\beta$-decay spectrum to a level of $<$ ppm. The best results are achieved with a multi-pixel ($\ge 10^4$ pixels) detector using full waveform digitization. In this case, active-to-sterile mixing angles of the order of ${\sin }^2\theta =10^{-7}$ would be accessible from the viewpoint of ADC non-linearities. With purely peak-sensing ADCs a comparable sensitivity could be reached with highly linear ADCs, sufficient non-linearity corrections or by increasing the number of pixels to $\ge 10^5$.

arXiv comment20 pages, 14 figures

References in corpus (13)

• A Universal Density Profile from Hierarchical Clustering
• The $\nu$MSM, Dark Matter and Baryon Asymmetry of the Universe
• Detection of An Unidentified Emission Line in the Stacked X-ray spectrum of Galaxy Clusters
• Final Results from phase II of the Mainz Neutrino Mass Search in Tritium $\beta$ Decay
• Cold dark matter: controversies on small scales
• Sensitivity of Next-Generation Tritium Beta-Decay Experiments for keV-Scale Sterile Neutrinos
• Focal-plane detector system for the KATRIN experiment
• Galaxy Formation in WDM Cosmology
• An assessment of the "too big to fail" problem for field dwarf galaxies in view of baryonic feedback effects
• An X-ray Spectroscopic Search for Dark Matter in the Perseus Cluster with Suzaku
• Wavelet Approach to Search for Sterile Neutrinos in Tritium $\beta$-Decay Spectra
• Cosmological evolution of warm dark matter fluctuations II: Solution from small to large scales and keV sterile neutrinos
• A Suzaku Search for Dark Matter Emission Lines in the X-ray Brightest Galaxy Clusters

Cited by in corpus (7)

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• Development of a Silicon Drift Detector Array to Search for keV-scale Sterile Neutrinos with the KATRIN Experiment
• keV-Scale Sterile Neutrino Sensitivity Estimation with Time-Of-Flight Spectroscopy in KATRIN using Self-Consistent Approximate Monte Carlo
• The spectroscopy of solar sterile neutrinos