1,721,412 research outputs found
Trigger and data acquisition system of the High Energy Particle Detector on board the CSES-02 satellite
No full textThis contribution describes the system performing the trigger and the readout of the PMTs for the High Energy Particle Detector (HEPD-02) onboard the second satellite of the China Seismo Electromagnetic Satellite (CSES-02) mission. CSES is a project developed to research the ionospheric perturbations associated with earthquakes. The mission aims at building a network of multi-instrument satellites to conduct a thorough study of ionospheric phenomena. The HEPD-02 is designed to detect cosmic rays, i.e., electrons and protons, along with light nuclei, in the energy range between a few MeV and a few hundreds of MeV. The instrument consists of a tracker, a trigger and a calorimeter surrounded by a veto. All scintillating detectors are readout by a single board which also issues and manages the trigger signals for the whole apparatus. The HEPD-02 trigger system must be extremely versatile because along the orbit of CSES-02 particle fluxes span several orders of magnitude and data acquisition must guarantee the measurement of energy spectra with a high duty cycle. The HEPD-02 trigger system features concurrent trigger configurations and prescaling capability to match the amount of data the instrument can process and send to the ground. Each trigger pattern is optimized after scientific requirements about the field of view and the nature of particles impinging in HEPD-02, with prescaling settings suitably adjusted. All the trigger configurations will be monitored by rate meters. In addition, a trigger configuration dedicated to gamma-rays will be tracked on a time basis of 10 ms, to measure photon fluxes in the MeV-tens of MeV energy range and provide sensitivity for Gamma Ray Bursts. We provide a comprehensive description of the design criteria and the architecture of the trigger system
EUSO-Balloon: The first flight
No full textEUSO-Balloon is a pathfinder mission for JEM-EUSO, the near-UV telescope proposed to be installed on board the International Space Station (ISS). The main objective of this pathfinder mission is to perform a full scale end-to-end test of all the key technologies of JEM-EUSO detectors and to measure the UV background. The JEM-EUSO instrument consists of UV telescope designed to focus the signal of the UV tracks generated by Extreme Energy Cosmic Rays propagating in Earth's atmosphere, onto a finely pixelized UV camera. The EUSO-Balloon instrument, smaller than the one designed for the ISS, was launched on August 2014 from Timmins (Ontario, Canada). The flight lasted about five hours and the instrument reached a float altitude of about 40 km. From this altitude the telescope registered, at a rate of 400 000 frames/s, the nightglow background on forests, lakes and clouds, as well as city lights and artificial air showers tracks generated by means of a laser installed on an helicopter flying inside its field of view. In this contribution we will describe the instrument and its performance during the first flight. © 2015 Elsevier B.V. All rights reserved
The EUSO mission to study UHECR from space: Status and perspectives
Full text linkThe EUSO Collaboration has been studying a detector to be
installed on the International Space Station which will observe ultra-high-energy cosmic rays (UHECR) from space for the first time. The observation of UHECR from space offers several advantages such as large field of view, uniform observation of both celestial hemispheres, uniform detector response. For these reasons, spacebased observatories are complementary to the ground-based detectors. The EUSO Collaboration already built two pathfinders to test high-performance electronics and
optical systems to meet the science requirements and the constraints (mass, power, hardness, ...) of space-borne detectors. Second-generation pathfinders, EUSO-SPB and Mini-EUSO, are currently under development. EUSO-SPB is a NASA Super Pressure Balloon payload scheduled to fly from New Zealand in Spring 2017 for a flight duration which may reach 100 days. The main scientific objective is the first
observation and measurements of UHECR generated air showers by looking down from near space with a fluorescence detector. Mini-EUSO telescope (a joint ASIRoscosmos mission) will be placed on the Russian Module of the International Space Station in 2019. Its science objectives are the study of UV emission of natural, astronomical and artificial origin and of atmospheric phenomena. In this contribution, we will also report on the status and perspectives of the future EUSO mission
The JEM-EUSO time synchronization system and EUSO BALLOON Data Processor
No full textThe JEM-EUSO instrument is a wide-angle refractive telescope in near-ultraviolet wavelength region being proposed for attachment to the Japanese Experiment Module onboard ISS. The instrument will study the fluorescence light produced in atmosphere by UHECR of energy E > 5 1019 eV. It consists of high transmittance optical Fresnel lenses with a diameter of 2.5 m, a focal surface covered by 4932 MAPMTs of 64 pixels, front-end readout, trigger and system electronics. The tracks generated by the Extensive Air Showers produced by UHE primaries propagating in the atmosphere, are reconstructed on the focal surface by registering in a cyclic memory, every 2.5 microseconds, the data coming from the 315648 pixels and by selectively retrieving only the interesting ones on the occurrence of a second level trigger. In order to guarantee the correct time alignment of the events and to measure the arrival time of the event with a precision of few microseconds, a clock distribution and time synchronization system for the focal surface electronics has been developed. In this poster we will present the status and the technical solutions adopted so far. We will also discuss the Data Processor of EUSO-BALLOON experiment, the JEM EUSO pathfinder mission, in which a telescope of smaller dimension respect to the one designed for the ISS, will be mounted on board a stratospheric balloon. The main objective of this pathfinder mission, planned for the 2013, is to perform a full scale end-to-end test of all the key technologies and instrumentation of JEM- EUSO detectors. Furthermore EUSO-BALLOON will measure the atmospheric and terrestrial UV background components, in different observational modes, fundamental for the development of the simulations
The high energy particle detector onboard CSES-02 satellite
No full textIn this paper we will present a description of the High Energy Particle Detector (HEPD-02) developed for the China Seismo Electromagnetic Satellite (CSES) project. CSES is a scientific mission dedicated to monitoring electromagnetic, plasma and particles perturbations of atmosphere and inner Van Allen belts caused by solar and terrestrial phenomena, and to the study of the low energy component of the cosmic rays (3 - 100 MeV for electrons and 30 - 200 MeV for protons). The first satellite, launched in 2018, hosted several instruments onboard. The HEPD-01, built by the Italian "Limadou" collaboration, is the instrument devoted to separate electrons and protons, as well as light nuclei in the MeV energy window. The detector is composed of two planes of double-sided silicon microstrip detectors which give the direction of the incident particle, a segmented plastic scintillator for trigger and a calorimeter. The CSES-02 satellite is planned to be launched by the end of 2021. The next generation HEPD foresees improvements both on the tracker and the calorimeter. To improve trigger efficiency a new system with crossed layers of 2 mm thick segmented counters read by light-guides has been designed. A new tracker study is ongoing: 3 planes of ALPIDE CMOS pixel chips, developed for ALICE experiment at LHC
Euso-Balloon: A pathfinder mission for the JEM-EUSO experiment
No full textEUSO-Balloon is a pathfinder mission for JEM-EUSO, the near-UV telescope proposed to be installed on board the ISS in 2017. The main objective of this pathfinder mission is to perform a full scale end-to-end test of all the key technologies and instrumentation of JEM-EUSO detectors and to prove the entire detection chain. EUSO-Balloon will measure the atmospheric and terrestrial UV background components, in different observational modes, fundamental for the development of the simulations. Through a series of flights performed by the French Space Agency CNES, EUSO-Balloon also has the potential to detect Extensive Air Showers (EAS) from above. EUSO-Balloon will be mounted in an unpressurized gondola of a stratospheric balloon. We will describe the instrument and the electronic system which performs instrument control and data management in such a critical environment. © 2013 Elsevier B.V
The Mini-EUSO telescope on the ISS
No full textThe Mini-EUSO project aims to perform observations of the UV-light night emission from Earth. The UV background produced in atmosphere is a key measurement for any experiment aiming at the observation of Extreme Energy Cosmic Rays (EECR) from space, the most energetic component of the cosmic radiation. The Mini-EUSO instrument will be placed within the International Space Station (ISS) in the Russian Module and measures through a UV transparent window. The instrument comprises a compact telescope with a large field of view, based on an optical system employing two Fresnel lenses for increased light collection. The light is focused onto an array of photo-multipliers and the resulting signal is converted into digital, processed and stored via the electronics subsystems on-board. The instrument is designed and built by the members of the JEM-EUSO collaboration. JEM-EUSO is a wide-angle refractive UV telescope being proposed for attachment to the ISS, which has been designed to address basic problems of fundamental physics and high-energy astrophysics investigating the nature of cosmic rays with energies above 1020 eV. Mini-EUSO will be able to study beside EECRs a wide range of scientific phenomena including atmospheric physics, strange quark matter and bioluminescence. The mission is approved by the Italian Space Agency and the Russian Space Agency. Scientific, technical and programmatic aspects of this project will be described. © 2016 Elsevier B.V
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