11 research outputs found
Plan de negocios para retail de carretera : propuesta de strip center en la Panamericana
Se propone un formato nuevo en el Per?, que pretende insertarse como un medio de proximidad de servicios y abastecimiento para las personas que transiten por tramos desatendidos de la carretera Panamericana, eje Norte ? Sur. El primer punto de ubicaci?n de la unidad comercial ser? antes del Pueblo de Cerro Azul y el desv?o a Ca?ete, Kil?metro 130; con miras de expansi?n hacia el resto de la Panamericana. Se considera el arrendamiento de espacios comerciales en un Strip Center de carretera. El mix comercial que se desea reunir est? conformado por un ?ancla? la cual ser? una estaci?n de servicios, cafeter?a, fast food y tienda de conveniencia. Adem?s, se incluir? un espacio para lavado de veh?culos, estaci?n de neum?ticos zona de cajeros y otros, Finalmente, el plus de la propuesta consiste en ofrecer; seguridad, comodidad y un servicio de calidad. Al respecto, se proyectan ambientes bien iluminados, con dise?o de espacios comerciales integrados, que prevea la menor interferencia entre el auto y el peat?n. Adem?s se contempla realizar alianzas estrat?gicas (polic?a de carreteras, bomberos, ambulancias, peaje, etc.), que terminen de completar la seguridad del strip center
KM3NeT/ARCA sensitivity to transient neutrino sources
The KM3NeT Collaboration is constructing a km3-volume neutrino telescope in the Mediterranean sea, ARCA (Astroparticle Research with Cosmics in the Abyss), for the detection and subsequent study of high-energy cosmic neutrinos.This telescope will be able to reconstruct the arrival direction of the neutrinos with a precision of ~0.1 degrees. The configuration of ARCA makes it sensitive to neutrinos in a wide energy range, from sub-TeV up to tens of PeV. Moreover, this detector has a large field of view and a very high duty cycle, allowing a full-sky (and all-flavours) searches. All these features make ARCA an excellent candidate to study transient neutrino sources.
Atmospheric muons and neutrinos, produced by primary cosmic rays, constitute the main background for ARCA. This background can be several orders of magnitude higher than the expected cosmic neutrino flux. In this work, we introduce an event selection which reduces the background up to a negligible level inside the region of interest and within the search time window. The ARCA performance to detect a transient neutrino flux, including the effective area, sensitivity and discovery potential, are provided for a given test source, and for different time windows
Comparison of the measured atmospheric muon rate with Monte Carlo simulations and sensitivity study for detection of prompt atmospheric muons with KM3NeT
The KM3NeT Collaboration has successfully deployed the first detection units of the next genera-
tion undersea neutrino telescopes in the Mediterranean Sea at the two sites in Italy and in France.
The data sample collected between December 2016 and January 2020 has been used to measure
the atmospheric muon rate at two different depths under the sea level: 3.5 km with KM3NeT-
ARCA and 2.5 km with KM3NeT-ORCA. Atmospheric muons represent an abundant signal in a
neutrino telescope and can be used to test the reliability of the Monte Carlo simulation chain and
to study the physics of extensive air showers caused by highly-energetic primary nuclei impinging
the Earth’s atmosphere. At energies above PeV the contribution from prompt muons, created right
after the first interaction in the shower, is expected to become dominant, however its existence has
not yet been experimentally confirmed. In this talk, data collected with the first detection units of
KM3NeT are compared to Monte Carlo simulations based on MUPAGE and CORSIKA codes.
The main features of the simulation and reconstruction chains are presented. Additionally, the
first results of the simulated signal from the prompt muon component for KM3NeT-ARCA and
KM3NeT-ORCA obtained with CORSIKA are discussed
Search for nuclearites with the KM3NeT detector
Strange quark matter (SQM) is a hypothetical type of matter composed of almost equal quantities of up, down and strange quarks. In [1], Edward Witten presented the SQM as a denser and more stable matter that could represent the ground state of Quantum Chromodynamics (QCD). Massive SQM particles are called nuclearites. These particles could have been produced in violent astrophysical processes, such as neutron star collisions and could be present in the cosmic radiation. Nuclearites with masses greater than 1013 GeV and velocities of about 250 km/s (typical galactic velocities) could reach the Earth and interact with atoms and molecules of sea water within the sensitive volume of the deep-sea neutrino telescopes. The SQM particles can be detected with the KM3NeT telescope (whose first lines are already installed and taking data in the Mediterranean Sea) through the visible blackbody radiation generated along their path inside or near the instrumented area. In this work the results of a study using Monte Carlo simulations of down-going nuclearites are discussed
First neutrino oscillation measurement in KM3NeT/ORCA
The KM3NeT/ORCA is a next-generation neutrino detector currently under construction in the Mediterranean Sea. There are currently 6 Detection Units deployed, and in the past year the detector has been steadily taking data. Here the first neutrino oscillation measurement is presented using data taken with the ORCA detector 6 Detection Units, containing 354.6 days of exposure. Selection criteria are discussed, followed by a neutrino oscillation analysis. In the analysis it is found that oscillations are preferred with a confidence level of 5.9 σ over "no oscillations". Likelihood scans of the Δm231 and sin2θ23 parameter also show a strong exclusion of the no oscillation hypothesis. The sensitivity contour in (sin2θ23,Δm231) is presented, showing results that are approaching to being being competitive with other experiments
The Calibration Units of KM3NeT
KM3NeT is a deep-sea infrastructure composed of two neutrino telescopes being deployed in the Mediterranean Sea : ARCA, near Sicily in Italy, designed for neutrino astronomy and ORCA, near Toulon in France, designed for neutrino oscillations. These two telescopes are 3D arrays of optical modules used to detect the Cherenkov radiation, which is a signature of charged particles created in the neutrino interaction and propagating faster than light in the sea water.
To achieve the best performance for the event reconstruction in the telescopes, the exact location of the optical modules, affected by the sea current, must be known at any time and the timing resolution between optical modules must reach the nanosecond level. Moreover, the properties of the environment, in which the telescopes are deployed, such as temperature and salinity, are continuously monitored to allow best modelling of the acoustic signal propagation in the water.
KM3NeT is going to deploy several dedicated Calibration Units hosting instruments dedicated to meet these calibration goals. The Calibration Base will host a Laser Beacon for time calibration and a long-baseline acoustic emitter and a hydrophone, which are part of the positioning system for the optical modules. Some of these Calibration Units will also be equipped with an Instrumentation Unit hosting environmental monitoring instruments.
This poster describes all the devices, features and purposes of the Calibration Units, with a special emphasis on the first such unit that will be deployed on the ORCA site in 2021
Real-time Multi-Messenger Analysis Framework of KM3NeT
KM3NeT is a multi-purpose cubic-kilometer neutrino observatory in construction in the Mediter-
ranean Sea. It consists of ORCA and ARCA (for Oscillation and Astroparticle Research with
Cosmics in the Abyss, respectively); currently both have a few detection lines in operation. Al-
though having different primary goals, both detectors can be used to do neutrino astronomy over a
wide energy range, from a few GeV to a few tens of PeV. In view of the growing field of time-domain
astronomy, it is increasingly crucial to be able to identify neutrinos in real-time. This online neu-
trino sample will serve to trigger neutrino alerts that will be sent to the astronomy community and
to look for time/space coincidence around external electromagnetic and multi-messenger triggers.
These real-time searches can significantly increase the discovery potential of transient cosmic
accelerators and refine the pointing directions in the case of poorly localized triggers, such as
gravitational waves. In the field of core-collapse supernovae (CCSN), the detection of the MeV-
scale CCSN neutrinos is crucial as an early warning. KM3NeT’s digital optical modules act as
good detectors for these neutrinos. This proceeding presents the status of KM3NeT’s real-time
multi-messenger activities, including supernova monitoring, online event reconstruction, event
classification and selection, alert distribution, and the first test of the selection on data
Neutrino non-standard interactions with theKM3NeT/ORCA detector
KM3NeT/ORCA is a dense array that constitutes the low-energy branch of the KM3NeT project with the main goal of resolving the question of the neutrino mass ordering. At present, the KM3NeT/ORCA Phase 1 has already been deployed, which means that six out of the planned 115 detection lines are operational. Even with this limited configuration, neutrino oscillations can already be measured and studied. In this contribution, the sensitivity to the neutrino Non-Standard Interactions (NSI) parameter εμτ using the current stage of the KM3NeT/ORCA detector together with the projections for the final configuration are presented
PMT gain calibration and monitoring based on highly compressed hit information in KM3NeT
The cubic-kilometre neutrino telescope, consisting of large-scale 3D-arrays of photomultiplier tubes (PMTs) currently under construction on the Mediterannean seabed, relies on accurate calibration procedures in order to answer its science goals. These proceedings present an overview of a novel gain calibration method based on highly compressed PMT hit information. In particular, it is shown that the PMT gains can be tuned to within 2% of the nominal value, based on the measured time-over-threshold
Sensitivity estimates for diffuse, point-like and extended neutrino sources with KM3NeT/ARCA
The identification of cosmic objects emitting high energy neutrinos could provide new insights about the Universe and its active sources. The existence of these cosmic neutrinos has been proven by the IceCube collaboration, but the big question of which sources these neutrinos originate from, remains unanswered. The KM3NeT detector for Astroparticle Research with Cosmics in the Abyss (ARCA), with a km3 instrumented volume, is currently being built in the Mediterranean Sea. It will excel at identifying cosmic neutrino sources due to its unprecedented angular resolution for muon neutrinos (< 0.2 degree for E > 10 TeV events). KM3NeT has a view of the sky complementary to IceCube, and is sensitive to neutrinos across a wide range of energies. In order to identify the signature of cosmic neutrino sources in the background of atmospheric neutrinos and muons, statistical methods are being developed and tested with Monte-Carlo pseudo-experiments. This contribution presents the most recent sensitivity estimates for diffuse, point-like and extended neutrino sources with KM3NeT/ARCA