20 research outputs found
PROSPECT-II Physics Opportunities
The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, has made
world-leading measurements of reactor antineutrinos at short baselines. In its
first phase, conducted at the High Flux Isotope Reactor (HFIR) at Oak Ridge
National Laboratory, PROSPECT produced some of the strongest limits on eV-scale
sterile neutrinos, made a precision measurement of the reactor antineutrino
spectrum from U, and demonstrated the observation of reactor
antineutrinos in an aboveground detector with good energy resolution and
well-controlled backgrounds. The PROSPECT collaboration is now preparing an
upgraded detector, PROSPECT-II, to probe yet unexplored parameter space for
sterile neutrinos and contribute to a full resolution of the Reactor
Antineutrino Anomaly, a longstanding puzzle in neutrino physics. By pressing
forward on the world's most precise measurement of the U antineutrino
spectrum and measuring the absolute flux of antineutrinos from U,
PROSPECT-II will sharpen a tool with potential value for basic neutrino
science, nuclear data validation, and nuclear security applications. Following
a two-year deployment at HFIR, an additional PROSPECT-II deployment at a low
enriched uranium reactor could make complementary measurements of the neutrino
yield from other fission isotopes. PROSPECT-II provides a unique opportunity to
continue the study of reactor antineutrinos at short baselines, taking
advantage of demonstrated elements of the original PROSPECT design and close
access to a highly enriched uranium reactor core
Final Measurement of the U235 Antineutrino Energy Spectrum with the PROSPECT-I Detector at HFIR
This Letter reports one of the most precise measurements to date of the
antineutrino spectrum from a purely U235-fueled reactor, made with the final
dataset from the PROSPECT-I detector at the High Flux Isotope Reactor. By
extracting information from previously unused detector segments, this analysis
effectively doubles the statistics of the previous PROSPECT measurement. The
reconstructed energy spectrum is unfolded into antineutrino energy and compared
with both the Huber-Mueller model and a spectrum from a commercial reactor
burning multiple fuel isotopes. A local excess over the model is observed in
the 5MeV to 7MeV energy region. Comparison of the PROSPECT results with those
from commercial reactors provides new constraints on the origin of this excess,
disfavoring at 2.2 and 3.2 standard deviations the hypotheses that
antineutrinos from U235 are solely responsible and non-contributors to the
excess observed at commercial reactors respectively.Comment: The paper has been updated with an improved parametrization of the
observed antineutrino spectrum excess and extended discussion on its
potential isotopic origi
Calibration strategy of the PROSPECT-II detector with external and intrinsic sources
This paper presents an energy calibration scheme for an upgraded reactor
antineutrino detector for the Precision Reactor Oscillation and Spectrum
Experiment (PROSPECT). The PROSPECT collaboration is preparing an upgraded
detector, PROSPECT-II (P-II), to advance capabilities for the investigation of
fundamental neutrino physics, fission processes and associated reactor neutrino
flux, and nuclear security applications. P-II will expand the statistical power
of the original PROSPECT (P-I) dataset by at least an order of magnitude. The
new design builds upon previous P-I design and focuses on improving the
detector robustness and long-term stability to enable multi-year operation at
one or more sites. The new design optimizes the fiducial volume by elimination
of dead space previously occupied by internal calibration channels, which in
turn necessitates the external deployment. In this paper, we describe a
calibration strategy for P-II. The expected performance of externally deployed
calibration sources is evaluated using P-I data and a well-benchmarked
simulation package by varying detector segmentation configurations in the
analysis. The proposed external calibration scheme delivers a compatible energy
scale model and achieves comparable performance with the inclusion of an
additional AmBe neutron source, in comparison to the previous internal
arrangement. Most importantly, the estimated uncertainty contribution from the
external energy scale calibration model meets the precision requirements of the
P-II experiment.Comment: 19 pages, 10 figure
Déficit en la asistencia médica farmacológica y de seguimiento en el tratamiento del tabaquismo en México
El tabaquismo es una adicción que causa la muerte prematura de la mitad de sus consumidores. Con una prevalencia de hasta 21.7% y 60 000 muertes atribuibles en México en 2010, se puede entender por qué el tabaquismo es un serio problema de salud
In Cane's Shadow: Commodity Plantations and the Local Agrarian Economy on Cuba's Mid-nineteenth Century Sugar Frontier
Memorias del I Congreso Internacional de Bioingeniería y Sistemas Inteligentes de Rehabilitación - CIBSIR 2017
El I Congreso Internacional de Bioingeniería y Sistemas Inteligentes de Rehabilitación, se celebró en Quito, capital del Ecuador. Su organización estuvo a cargo de profesores e investigadores de la Escuela Politécnica Nacional (EPN), Universidad Politécnica Salesiana (UPS), Universitat Politécnica de Valencia (UPV), Universidad Técnica del Norte (UTN), Escuela Superior Politécnica del Chimborazo (ESPOCH), Universidad de las Fuerzas Armadas (ESPE), Universidad Central del Ecuador (UCE), Escuela Superior Politécnica del Litoral (ESPOL), Universidad San Francisco de Quito (USFQ), Universidad de Las Américas (UDLA) y Universidad Mariana de Colombia. Todas ellas universidades que han trabajado de manera rigurosa para la creación de un programa académico que sirva de marco para la investigación y el intercambio de conocimientos y experiencias, así como para el desarrollo de oportunidades de colaboración para promover la difusión de tecnologías relacionadas
con estos campos.
Este congreso fue dirigido tanto a académicos como a profesionales y estudiantes interesados en compartir conocimientos y experiencias en las áreas de Bioingeniería y Sistemas Inteligentes de Rehabilitación.
En la actualidad, el creciente avance tecnológico dedicado a los campos de la Bioingeniería y Sistemas de Rehabilitación, hace necesaria la disponibilidad de un espacio de difusión para las investigaciones que se han desarrollado en instituciones de educación superior e investigación dedicadas a estos trabajos