8,867 research outputs found
Convolutional Neural Networks Applied to Neutrino Events in a Liquid Argon Time Projection Chamber
We present several studies of convolutional neural networks applied to data
coming from the MicroBooNE detector, a liquid argon time projection chamber
(LArTPC). The algorithms studied include the classification of single particle
images, the localization of single particle and neutrino interactions in an
image, and the detection of a simulated neutrino event overlaid with cosmic ray
backgrounds taken from real detector data. These studies demonstrate the
potential of convolutional neural networks for particle identification or event
detection on simulated neutrino interactions. We also address technical issues
that arise when applying this technique to data from a large LArTPC at or near
ground level
Study and optimization of the spatial resolution for detectors with binary readout
Using simulations and analytical approaches, we have studied single hit
resolutions obtained with a binary readout, which is often proposed for high
granularity detectors to reduce the generated data volume. Our simulations
considering several parameters (e.g. strip pitch) show that the detector
geometry and an electronics parameter of the binary readout chips could be
optimized for binary readout to offer an equivalent spatial resolution to the
one with an analogue readout. To understand the behavior as a function of
simulation parameters, we developed analytical models that reproduce simulation
results with a few parameters. The models can be used to optimize detector
designs and operation conditions with regard to the spatial resolution.Comment: 21 pages, 20 figure
Particle identification
Particle IDentification (PID) is fundamental to particle physics experiments.
This paper reviews PID strategies and methods used by the large LHC
experiments, which provide outstanding examples of the state-of-the-art. The
first part focuses on the general design of these experiments with respect to
PID and the technologies used. Three PID techniques are discussed in more
detail: ionization measurements, time-of-flight measurements and Cherenkov
imaging. Four examples of the implementation of these techniques at the LHC are
given, together with selections of relevant examples from other experiments and
short overviews on new developments. Finally, the Alpha Magnetic Spectrometer
(AMS 02) experiment is briefly described as an impressive example of a
space-based experiment using a number of familiar PID techniques.Comment: 61 pages, 30 figure
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Reconstruction and measurement of (100) MeV energy electromagnetic activity from π0 arrow γγ decays in the MicroBooNE LArTPC
We present results on the reconstruction of electromagnetic (EM) activity from photons produced in charged current νμ interactions with final state π0s. We employ a fully-automated reconstruction chain capable of identifying EM showers of (100) MeV energy, relying on a combination of traditional reconstruction techniques together with novel machine-learning approaches. These studies demonstrate good energy resolution, and good agreement between data and simulation, relying on the reconstructed invariant π0 mass and other photon distributions for validation. The reconstruction techniques developed are applied to a selection of νμ + Ar → μ + π0 + X candidate events to demonstrate the potential for calorimetric separation of photons from electrons and reconstruction of π0 kinematics
The Highly Miniaturised Radiation Monitor
We present the design and preliminary calibration results of a novel highly
miniaturised particle radiation monitor (HMRM) for spacecraft use. The HMRM
device comprises a telescopic configuration of active pixel sensors enclosed in
a titanium shield, with an estimated total mass of 52 g and volume of 15
cm. The monitor is intended to provide real-time dosimetry and
identification of energetic charged particles in fluxes of up to 10
cm s (omnidirectional). Achieving this capability with such a
small instrument could open new prospects for radiation detection in space.Comment: 17 pages, 15 figure
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