Algorithms for Identification of Nearly-Coincident Events in Calorimetric Sensors

Abstract

For experiments with high arrival rates, reliable identification of nearly-coincident events can be crucial. For calorimetric measurements to directly measure the neutrino mass such as HOLMES, unidentified pulse pile-ups are expected to be a leading source of experimental error. Although Wiener filtering can be used to recognize pile-up, it suffers errors due to pulse-shape variation from detector nonlinearity, readout dependence on sub-sample arrival times, and stability issues from the ill-posed deconvolution problem of recovering Dirac delta-functions from smooth data. Due to these factors, we have developed a processing method that exploits singular value decomposition to (1) separate single-pulse records from piled-up records in training data and (2) construct a model of single-pulse records that accounts for varying pulse shape with amplitude, arrival time, and baseline level, suitable for detecting nearly-coincident events. We show that the resulting processing advances can reduce the required performance specifications of the detectors and readout system or, equivalently, enable larger sensor arrays and better constraints on the neutrino mass.

arXiv commentTo appear in J. Low Temperature Physics. 11 pages

References in corpus (9)

• HOLMES - The Electron Capture Decay of 163Ho to Measure the Electron Neutrino Mass with sub-eV sensitivity
• Direct Measurement of the Mass Difference of Ho163 and Dy163 Solves the Q-Value Puzzle for the Neutrino Mass Determination
• The Electron Capture ${}^{163}$Ho Experiment ECHo: an overview
• The Practice of Pulse Processing
• Microcalorimeter Spectroscopy at High Pulse Rates: a Multi-Pulse Fitting Technique
• Examination of the calorimetric spectrum to determine the neutrino mass in low-energy electron capture decay
• Electron Capture in 163Ho and Overlap plus Exchange Corrections and the Neutrino Mass
• Improved Description of One- and Two-Hole States after Electron Capture in 163 Holmium and the Determination of the Neutrino Mass
• Determination of the neutrino mass by electron capture in 163 Holmium and the role of the three-hole states in 163 Dysprosium

Cited by in corpus (8)

• A Review of X-ray Microcalorimeters Based on Superconducting Transition Edge Sensors for Astrophysics and Particle Physics
• The use of low temperature detectors for direct measurements of the mass of the electron neutrino
• Broad-band High-Energy Resolution Hard X-ray Spectroscopy using Transition Edge Sensors at SPring-8
• Working principle and demonstrator of microwave-multiplexing for the HOLMES experiment microcalorimeters
• Status of the HOLMES Experiment to Directly Measure the Neutrino Mass
• Progress in the development of TES microcalorimeter detectors suitable for neutrino mass measurement
• A novel approach for nearly-coincident events rejection
• Data reduction for a calorimetrically measured ${}^{163}\mathrm{Ho}$ spectrum of the ECHo-1k experiment