24,755 research outputs found
The electronics and trigger system of the High Energy Particle Detector (HEPD) onboard the China Electromagnetic Satellite (CSES)
No full textIn this paper a description of the electronics and trigger system of the High Energy Particle Detector (HEPD) onboard the China Seismo Electromagnetic Satellite (CSES) and its main characteristics will be presented. 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 (5 - 100 MeV for electrons and 15 - 300 MeV for protons). The satellite will be launched in 2017 and will host several instruments onboard: two magnetometers, an electrical field detector, a plasma analyser, a Langmuir probe and the HEPD. The HEPD, built by the Italian "Limadou" collaboration, is capable of separating electrons and protons and identify nuclei up to Iron. The HEPD comprises the following subsystems: detector, electronics, power supply and mechanics. The electronics, main focus of this paper, can be divided into three blocks: silicon detector, scintil-lator detectors (trigger, energy and veto detectors) and global control and data managing. The trigger system allows switching between several configurations along the orbit to cope with different fluxes encountered. Each trigger configuration corresponds to different field of view of the apparatus. © 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)
The HEPD detector on board CSES satellite: In flight performance
No full textCSES (China Seismo-Electromagnetic Satellite) is a scientific mission dedicated to monitoring electromagnetic field, 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. The satellite hosts several instruments onboard: two magnetometers, an electrical field detector, a plasma analyser, a Langmuir probe and two particle detectors. It has been successfully launched from the Jiuquan Satellite Launch Center located in west of inner Mongolia on February 2 2018 and is now orbiting in nominal condition. The high energy particle detector (HEPD), designed and built by the Italian “Limadou” collaboration, aims at investigating precipitation of trapped particles induced by atmospheric EM emissions, as well as by the seismo-electromagnetic disturbances. HEPD provides good energy resolution and high angular resolution for electrons (3–100 MeV) and proton (30–200 MeV). The instrument consists of: 2 planes of double-side silicon microstrip sensors placed on the top of the instrument (direction of particle); 2 two layers of plastic scintillators (trigger) and a calorimeter (constituted by other 16 scintillators and a layer of LYSO sensors). A scintillator veto system completes the instrument. The commissioning of the HEPD and the other instruments on board is in progress and will last several months. In this contribution we will describe the HEPD detector and the (preliminary) performance in flight. © 2018 Elsevier B.V
CSES-Limadou data processing at ASI-SSDC
No full textThe CSES space mission, an international collaboration between China and Italy, aims at monitoring the perturbations originated by electromagnetic emissions in the ionosphere, magnetosphere and in the Van Allen radiation belts, and at investigating possible correlations with seismic events. The Italian collaboration, named LIMADOU, contributed to the mission with the realization of the High Energy Particle Detector (HEPD), an instrument realized on the basis of a long experience in developing advanced space detectors for charged and neutral particles and gamma rays - on a wide range of energies - for applications in solar physics as well as in extra-galactic astrophysics and cosmology. The CSES Satellite was launched from the Jiuquan Satellite Launch Center on February 2, 2018 and the expected mission lifetime is 5 years. Satellite data are transferred to the Institute of Crustal Dynamics (ICD) of the China Earthquake Administration (CEA) in Beijing, China. After the donwlink HEPD raw data are transferred to the Italian Ground Segment. In the IGS, HEPD raw data are processed from level0 to level2 after calibration and equalization in a high-availability processing server and stored in a high-resilience storage. In this proceeding we present a schematic of the HEPD detector data structure and the processing pipeline that has been built at the Italian Space Agency - Space Science Data Center
The hepd apparatus for the cses mission
No full textThe CSES (China Seismo-Electromagnetic Satellite) mission will investigate the structure and the dynamic of the topside ionosphere, will monitor electric and magnetic field and high energy particle fluctuations, searching for their correlations with the geophysical activity, in order to contribute to the monitoring of earthquakes from space. The High-Energy Particle Detector (HEPD) is one of the payloads of the CSES space mission, built by the Italian Limadou collaboration. Results of the test beams held at the Beam Test Facility of the INFN National Laboratory of Frascati, for electrons, and at the Proton Cyclotron of Trento, for protons, will be presented. © Copyright owned by the author(s)
The hepd apparatus for the cses mission
No full textThe CSES (China Seismo-Electromagnetic Satellite) mission will investigate the structure and the dynamic of the topside ionosphere, will monitor electric and magnetic field and high energy particle fluctuations, searching for their correlations with the geophysical activity, in order to contribute to the monitoring of earthquakes from space. The High-Energy Particle Detector (HEPD) is one of the payloads of the CSES space mission, built by the Italian Limadou collaboration. Results of the test beams held at the Beam Test Facility of the INFN National Laboratory of Frascati, for electrons, and at the Proton Cyclotron of Trento, for protons, will be presented
The HEPD particle detector and the EFD electric field detector for the CSES satellite
No full textThe CSES satellite, developed by Chinese (CNSA) and Italian (ASI) space Agencies, will investigate iono-magnetospheric disturbances (induced by seismicity and electromagnetic emissions of tropospheric and anthropogenic origin); will monitor the temporal stability of the inner Van Allen radiation belts and will study the solar-terrestrial coupling by measuring fluxes of cosmic rays and solar energetic particles. In particular the mission aims at confirming the existences (claimed from several analyses) of a temporal correlations between the occurrence of earthquakes and the observation in space of electromagnetic disturbances, plasma fluctiations and anomalous fluxes of high-energy particles precipitating from the inner Van Allen belt. CSES will be launched in the summer of 2017 with a multi-instruments payload able to measure: e.m. fields, charged particles, plasma, TEC, etc. The Italian LIMADOU collaboration will provide the High-Energy Particle Detector (HEPD), designed for detecting electrons (3–200 MeV) and proton (30–300 MeV)), and participates to develop the Electric Field Detector (EFD) conceived for measuring electric field from ∼DC up to 5 MHz
The HEPD apparatus for the CSES mission
No full textThe High-Energy Particle Detector (HEPD) is one of the payloads of the CSES space mission. The HEPD is built by the Italian Limadou collaboration and has different goals. It will study the temporal stability of the inner Van Allen radiation belts, the precipitation of trapped particles in the atmosphere and the low energy component of the cosmic rays (5 - 100 MeV for electrons and 15 - 300 MeV for protons). It has been tested at the Beam Test Facility of the INFN National Laboratory of Frascati, for electrons, and at the Proton Cyclotron of Trento, for protons. Here is presented a study of the performance of the apparatus to separate electrons and protons and identify nuclei up to iron
The HEPD apparatus for the CSES mission
No full textThe High-Energy Particle Detector (HEPD) is one of the payloads of the CSES space mission. The HEPD is built by the Italian Limadou collaboration and has different goals. It will study the temporal stability of the inner Van Allen radiation belts, the precipitation of trapped particles in the atmosphere and the low energy component of the cosmic rays (5-100 MeV for electrons and 15-300 MeV for protons). It has been tested at the Beam Test Facility of the INFN National Laboratory of Frascati, for electrons, and at the Proton Cyclotron of Trento, for protons. Here is presented a study of the performance of the apparatus to separate electrons and protons and identify nuclei up to iron
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
The new High Energy Particle Detector (HEPD-02) on board the CSES-02 satellite
No full textThe China Seismo-Electromagnetic Satellite (CSES) is a multi-
payload space observatory aimed at monitoring the near-Earth environment through the observation of the Van Allen Belts dynamics, the study of solar-terrestrial interactions and the extension at low energies of Cosmic Ray measurements. The
first satellite (CSES-01) has been in orbit since February 2018, hosting on board the High Energy Particle Detector (HEPD-01) developed by the Italian LIMADOU collaboration. The launch of the second satellite (CSES-02) is expected at the end of 2024. It will carry HEPD-02, a new high-energy particle detector optimized to
detect charged particles, mostly electrons in the 3-100 MeV energy range and protons between 30 and 200 MeV, with good capabilities for identifying light nuclei and detecting Gamma Ray Bursts. The instrument is quite compact (40.36 cm × 53.00 cm × 38.15 cm) and presents important upgrades with respect to its predecessor.
It will be the first instrument in space carrying a CMOS pixel tracker designed to achieve 5-micron resolution; and the largest LYSO crystals (15.0 cm × 4.9 cm × 2.5 cm) ever used, as part of the electromagnetic calorimeter. This contribution provides a synthetic description of the HEPD-02 detector on board the CSES-02 mission and summarizes its main characteristics and performance
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