About
Dr. Selene Campion is an Assistant Professor in the Department of Political Science at the University of Utah. Her research focuses on political behavior and comparative political economy in advanced democracies. She is particularly interested in topics related to distributive politics, inequality, and political representation in urban settings. Her book project explores the substantive outcomes of descriptive representation across European cities, emphasizing how the political geography of representation impacts public spending and redistribution. Additionally, she investigates non-programmatic politics in advanced democracies, including clientelism and patronage. Currently, she is working on a project that examines the impact of election betting on democratic participation and polarization.
Research topics
- Physics
- Computer Science
- Electrical engineering
- Engineering
- Nuclear physics
- Astronomy
- Astrophysics
- Optics
Selected publications
Hint for a TeV neutrino emission from the Galactic Ridge with ANTARES
Physics Letters B · 2023 · 52 citations
- Physics
- Astrophysics
- Astronomy
Interactions of cosmic ray protons, atomic nuclei, and electrons in the interstellar medium in the inner part of the Milky Way produce a γ-ray flux from the Galactic Ridge. If the γ-ray emission is dominated by proton and nuclei interactions, a neutrino flux comparable to the γ-ray flux is expected from the same sky region. Data collected by the ANTARES neutrino telescope are used to constrain the neutrino flux from the Galactic Ridge in the 1-100 TeV energy range. Neutrino events reconstructed both as tracks and showers are considered in the analysis and the selection is optimized for the search of an excess in the region |l|<30°, |b|<2°. The expected background in the search region is estimated using an off-zone region with similar sky coverage. Neutrino signal originating from a power-law spectrum with spectral index ranging from Γν=1 to 4 is simulated in both channels. The observed energy distributions are fitted to constrain the neutrino emission from the Ridge. The energy distributions in the signal region are inconsistent with the background expectation at ∼96% confidence level. The mild excess over the background is consistent with a neutrino flux with a power law with a spectral index 2.45−0.34+0.22 and a flux normalization dNνdEν=4.0−2.0+2.7×10−16 GeV−1 cm−2 s−1 sr−1 at 40 TeV reference energy. Such flux is consistent with the expected neutrino signal if the bulk of the observed γ-ray flux from the Galactic Ridge originates from interactions of cosmic ray protons and nuclei with a power-law spectrum extending well into the PeV energy range.
The KM3NeT multi-PMT optical module
Journal of Instrumentation · 2022 · 78 citations
- Computer Science
- Physics
- Optics
Abstract The optical module of the KM3NeT neutrino telescope is an innovative multi-faceted large area photodetection module. It contains 31 three-inch photomultiplier tubes in a single 0.44 m diameter pressure-resistant glass sphere. The module is a sensory device also comprising calibration instruments and electronics for power, readout and data acquisition. It is capped with a breakout-box with electronics for connection to an electro-optical cable for power and long-distance communication to the onshore control station. The design of the module was qualified for the first time in the deep sea in 2013. Since then, the technology has been further improved to meet requirements of scalability, cost-effectiveness and high reliability. The module features a sub-nanosecond timing accuracy and a dynamic range allowing the measurement of a single photon up to a cascade of thousands of photons, suited for the measurement of the Cherenkov radiation induced in water by secondary particles from interactions of neutrinos with energies in the range of GeV to PeV. A distributed production model has been implemented for the delivery of more than 6000 modules in the coming few years with an average production rate of more than 100 modules per month. In this paper a review is presented of the design of the multi-PMT KM3NeT optical module with a proven effective background suppression and signal recognition and sensitivity to the incoming direction of photons.
Frequent coauthors
- 346 shared
A. Kouchner
Institut Universitaire de France
- 342 shared
Dorothea Franziska Elisabeth Samtleben
Leiden University
- 334 shared
M. Bendahman
Centre National de la Recherche Scientifique
- 333 shared
J. A. B. Coelho
Université Paris Cité
- 325 shared
C. Donzaud
Laboratoire AstroParticule et Cosmologie
- 324 shared
G. Qúeḿener
- 324 shared
V. Van Elewyck
Université Paris Cité
- 318 shared
L. Martin
Nantes Université
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