25,073 research outputs found
The JEM-EUSO Mission: Status and Prospects in 2011 - Contributions of the JEM-EUSO Collaboration to the 32nd International Cosmic Ray Conference
No full textContributions of the JEM-EUSO Collaboration to the 32nd International Cosmic
Ray Conference, Beijing, August, 201
The JEM-EUSO Mission: Status and Prospects in 2011 - Contributions of the JEM-EUSO Collaboration to the 32nd International Cosmic Ray Conference
No full textContributions of the JEM-EUSO Collaboration to the 32nd International Cosmic
Ray Conference, Beijing, August, 201
The JEM-EUSO mission to explore the extreme Universe
No full textAccommodated on the Japanese Experiment Module (JEM) of the International Space Station (ISS), the Extreme Universe Space Observatory JEM-EUSO will utilize the Earth’s atmosphere as a giant detector of the extreme energy cosmic rays; the most energetic particles coming from the Universe. Looking downward the Earth from Space, JEM-EUSO will detect such particles by observing the fluorescence and Cherenkov photons produced during their pass in the atmosphere. The main objective of JEM-EUSO is doing astronomy and astrophysics through the particle channel with extreme energies above several times 1019 eV with a significant statistics beyond the Greisen–Zatsepin–Kuzmin (GZK) cut-off. Moreover, JEM-EUSO could observe extremely high energy neutrinos. JEM-EUSO has been designed to operate for more than 3 years onboard the ISS orbiting around the Earth every 90 min at an altitude of about 400 km. JAXA has selected JEM-EUSO as one of the mission candidates of the second phase utilization of JEM/EF for the launch in mid 2010s
EUSO-SPB: In-flight performance
No full textThe Extreme Universe Space Observatory on a Super Pressure Balloon (EUSO-SPB1) is a path-finder mission within the JEM-EUSO program with the aim of detecting, for the first time from the edge of space, Ultra-High Energy Cosmic Rays by means of the fluorescence technique. EUSO SPB was launched April 24th 23:51 UTC 2017 from Wanaka, New Zealand as a mission of opportunity on a NASA super pressure balloon test flight planned to circle the southern hemisphere. After 12 days 4 h aloft, the flight was terminated prematurely in the Pacific Ocean about 300 km SE of Easter Island. This presentation will review the instrument and its in-flight performance. Preparations for a EUSO-SPB2 mission is underway. © 2018 Elsevier B.V
An evaluation of the exposure in nadir observation of the JEM-EUSO mission
No full textWe evaluate the exposure during nadir observations with JEM-EUSO, the Extreme Universe Space Obser-
vatory, on-board the Japanese Experiment Module of the International Space Station. Designed as a mis-
sion to explore the extreme energy Universe from space, JEM-EUSO will monitor the Earth’s nighttime
atmosphere to record the ultraviolet light from tracks generated by extensive air showers initiated by
ultra-high energy cosmic rays. In the present work, we discuss the particularities of space-based obser-
vation and we compute the annual exposure in nadir observation. The results are based on studies of the
expected trigger aperture and observational duty cycle, as well as, on the investigations of the effects of
clouds and different types of background light. We show that the annual exposure is about one order of
magnitude higher than those of the presently operating ground-based observatories
Developments and results in the context of the JEM-EUSO program obtained with the ESAF simulation and analysis framework
No full textJEM-EUSO is an international program for the development of space-based Ultra-High Energy Cosmic Ray observatories. The program consists of a series of missions which are either under development or in the data analysis phase. All instruments are based on a wide-field-of-view telescope, which operates in the near-UV range, designed to detect the fluorescence light emitted by extensive air showers in the atmosphere. We describe the simulation software ESAF in the framework of the JEM-EUSO program and explain the physical assumptions used. We present here the implementation of the JEM-EUSO, POEMMA, K-EUSO, TUS, Mini-EUSO, EUSO-SPB1 and EUSO-TA configurations in ESAF. For the first time ESAF simulation outputs are compared with experimental data
EUSO-OffLine: A Comprehensive Simulation and Analysis Framework
No full textThe complexity of modern cosmic ray observatories and the rich data sets they capture often require a sophisticated software framework to support the simulation of physical processes, detector response, as well as reconstruction and analysis of real and simulated data. Here we present the EUSO-OffLine framework. The code base was originally developed by the Pierre Auger Collaboration, and portions of it have been adopted by other collaborations to suit their needs. We have extended this software to fulfill the requirements of UHECR detectors and VHE neutrino detectors developed for the JEM-EUSO. These path-finder instruments constitute a program to chart the path to a future space-based mission like POEMMA. For completeness, we describe the overall structure of the framework developed by the Pierre Auger collaboration and continue with a description of the JEM-EUSO simulation and reconstruction capabilities. The framework is written predominantly in modern C++ and incorporates third-party libraries chosen based on functionality and our best judgment regarding support and longevity. Modularity is a central notion in the framework design, a requirement for large collaborations in which many individuals contribute to a common code base and often want to compare different approaches to a given problem. For the same reason, the framework is designed to be highly configurable, which allows us to contend with a variety of JEM-EUSO missions and observation scenarios. We also discuss how we incorporate broad, industry-standard testing coverage which is necessary to ensure quality and maintainability of a relatively large code base, and the tools we employ to support a multitude of computing platforms and enable fast, reliable installation of external packages. Finally, we provide a few examples of simulation and reconstruction applications using EUSO-OffLine
EUSO-OffLine: A Comprehensive Simulation and Analysis Framework
No full textThe complexity of modern cosmic ray observatories and the rich data sets they
capture often require a sophisticated software framework to support the
simulation of physical processes, detector response, as well as reconstruction
and analysis of real and simulated data. Here we present the EUSO-OffLine
framework. The code base was originally developed by the Pierre Auger
Collaboration, and portions of it have been adopted by other collaborations to
suit their needs. We have extended this software to fulfill the requirements of
UHECR detectors and VHE neutrino detectors developed for the JEM-EUSO. These
path-finder instruments constitute a program to chart the path to a future
space-based mission like POEMMA. For completeness, we describe the overall
structure of the framework developed by the Pierre Auger collaboration and
continue with a description of the JEM-EUSO simulation and reconstruction
capabilities. The framework is written predominantly in modern C++ and
incorporates third-party libraries chosen based on functionality and our best
judgment regarding support and longevity. Modularity is a central notion in the
framework design, a requirement for large collaborations in which many
individuals contribute to a common code base and often want to compare
different approaches to a given problem. For the same reason, the framework is
designed to be highly configurable, which allows us to contend with a variety
of JEM-EUSO missions and observation scenarios. We also discuss how we
incorporate broad, industry-standard testing coverage which is necessary to
ensure quality and maintainability of a relatively large code base, and the
tools we employ to support a multitude of computing platforms and enable fast,
reliable installation of external packages. Finally, we provide a few examples
of simulation and reconstruction applications using EUSO-OffLine
A Review of the EUSO-Balloon Pathfinder for the JEM-EUSO Program
No full textEUSO-Balloon is a pathfinder for JEM-EUSO, the mission concept of a spaceborne observatory which is designed to observe Ultra-High Energy Cosmic Ray (UHECR)-induced Extensive Air Showers (EAS) by detecting their UltraViolet (UV) light tracks "from above." On August 25, 2014, EUSO-Balloon was launched from Timmins Stratospheric Balloon Base (Ontario, Canada) by the balloon division of the French Space Agency CNES. After reaching a floating altitude of 38 km, EUSO-Balloon imaged the UV light in the wavelength range similar to 290-500 nm for more than 5 hours using the key technologies of JEM-EUSO. The flight allowed a good understanding of the performance of the detector to be developed, giving insights into possible improvements to be applied to future missions. A detailed measurement of the photoelectron counts in different atmospheric and ground conditions was achieved. By means of the simulation of the instrument response and by assuming atmospheric models, the absolute intensity of diffuse light was estimated. The instrument detected hundreds of laser tracks with similar characteristics to EASs shot by a helicopter flying underneath. These are the first recorded laser tracks measured from a fluorescence detector looking down on the atmosphere. The reconstruction of the direction of the laser tracks was performed. In this work, a review of the main results obtained by EUSO-Balloon is presented as well as implications for future space-based observations of UHECRs
The data processor system of EUSO-SPB
No full textWe will present the Data Processor (DP) and the flight software of EUSO-SPB. The EUSO-SPB experiment is a pathfinder mission of the EUSO program having as main objective to detect Ultra-High Energy Cosmic Rays (UHECR) by measuring, for the first time from the space, the fluorescence and the Cerenkov light produced by the interaction of the particle with the nuclei of the Earth's atmosphere. The instrument is a telescope of smaller dimension in respect to the one designed for the ISS, mounted on an unpressurised gondola of a super pressure pumpkin balloon. EUSO-SPB was launched from the Columbia Scientific Balloon Facility of Wanaka Airport (New Zealand) on the 24th of April 2017, 22:50 and lasted for 12 days 4.5 hours aloft. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0)
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