JEDI (original) (raw)
木星高能粒子探測儀（Jovian Energetic Particle Detector Instrument，JEDI）是進入木星繞極軌道的朱諾號攜帶的儀器之一，它是用於研究木星的磁層套裝儀器的一部分。 JEDI的設計是用來蒐集"能量、光譜、質典型式（氫、氦、氧、硫）和角分配" ，這個計畫是研究能量和帶電粒子的。它可以檢測30-1,000,000KeV，而另一件儀器，JADE，可以觀測低於30KeV的能量。正在研究的概念之一是，來自木星自轉的能量是否被轉化進入它的大氣層和磁層。 它是由 約翰·霍普金斯大學應用物理實驗室（APL）建造，蒐集來自行星的極光磁場線、赤道磁層和極區電離層的硬輻射的原位資料。目標之一是要了解極光，以及如何將粒子加速到如此高的速度。木星的謎團之一是由兩極發出的X射線，但似乎不是來自極光環。
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| dbo:abstract | JEDI (Jupiter Energetic-particle Detector Instrument) is an instrument on the Juno spacecraft orbiting planet Jupiter. JEDI coordinates with the several other space physics instruments on the Juno spacecraft to characterize and understand the space environment of Jupiter's polar regions, and specifically to understand the generation of Jupiter's powerful aurora. It is part of a suite of instruments to study the magnetosphere of Jupiter. JEDI consists of three identical detectors that use microchannel plates and foil layers to detect the energy, angle, and types of ion within a certain range. It can detect electrons between 40 and 500 keV (Kilo electron-volts), and hydrogen and oxygen from a few tens of keV to less than 1000 keV (1 MeV). JEDI uses radiation hardened Application Specific Integrated Circuits (ASIC)s. JEDI was turned on in January 2016 while still en route to Jupiter to also study interplanetary space. JEDI uses solid state detectors (SSD's) to measure the total energy (E) of both the ions and the electrons. The MCP anodes and the SSD arrays are configured to determine the directions of arrivals of the incoming charged particles. The instruments also use fast triple coincidence and optimum shielding to suppress penetrating background radiation and incoming UV foreground. JEDI is designed to collect data on "energy, spectra, mass species (H, He, O, S), and angular distributions"; the plan is to study the energies and distribution of charged particles. It can detect them at between 30 keV and 1 GeV, whereas JADE, another instrument on the spacecraft, is designed to observe below 30 keV. One of the concepts being studied is that energy from Jupiter's rotation is being converted into its atmosphere and magnetosphere. It is radiation hardened to collect in situ data on the planet's auroral magnetic field lines, the equatorial magnetosphere, and the polar ionosphere It was built by the Johns Hopkins University Applied Physics Laboratory (APL). One of the goals is to understand the aurora, and how particles are accelerated to such high speeds. One of the mysteries of Jupiter is that X-rays are emitted from the poles, but do not seem to come from the auroral ring. Each detector has a field of view of 120 degree by 12 degrees, and they are positioned to provide a 360 degree (a full circle) view of the sky along that axis. The Juno spacecraft travels very rapidly in the close vicinity of Jupiter (up to 50 km/s) and also spins very slowly (2 RPM). JEDI can detected particles from 30 to 1000 keV including: * Electrons * Proton (hydrogen) ions * Helium ions * Sulfur ions * Oxygen ions * Energetic neutral atoms (ENA's) In relation to other space missions, an instrument on the Earth-orbiting Van Allen Probes (launched 2012), called RBSPICE, is nearly identical to JEDI. This type of instrument is also similar to the PEPSSI instrument on New Horizons (Pluto/Kupiter probe). JEDI in combination with data from UVIS detected electrical potentials of 400,000 electron volts (400 keV), 20–30 times higher than Earth, driving charged particles into the polar regions of Jupiter. A scientific paper Juno observations of energetic charged particles over Jupiter's polar regions: Analysis of monodirectional and bidirectional electron beams included results from a close pass over Jupiter's poles in August 2016 for electrons (25–800 keV) and protons (10–1500 keV). The paper analyzed electron angular beams in the auroral regions. (en) 木星高能粒子探測儀（Jovian Energetic Particle Detector Instrument，JEDI）是進入木星繞極軌道的朱諾號攜帶的儀器之一，它是用於研究木星的磁層套裝儀器的一部分。 JEDI的設計是用來蒐集"能量、光譜、質典型式（氫、氦、氧、硫）和角分配" ，這個計畫是研究能量和帶電粒子的。它可以檢測30-1,000,000KeV，而另一件儀器，JADE，可以觀測低於30KeV的能量。正在研究的概念之一是，來自木星自轉的能量是否被轉化進入它的大氣層和磁層。 它是由 約翰·霍普金斯大學應用物理實驗室（APL）建造，蒐集來自行星的極光磁場線、赤道磁層和極區電離層的硬輻射的原位資料。目標之一是要了解極光，以及如何將粒子加速到如此高的速度。木星的謎團之一是由兩極發出的X射線，但似乎不是來自極光環。 (zh) |
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| rdfs:comment | 木星高能粒子探測儀（Jovian Energetic Particle Detector Instrument，JEDI）是進入木星繞極軌道的朱諾號攜帶的儀器之一，它是用於研究木星的磁層套裝儀器的一部分。 JEDI的設計是用來蒐集"能量、光譜、質典型式（氫、氦、氧、硫）和角分配" ，這個計畫是研究能量和帶電粒子的。它可以檢測30-1,000,000KeV，而另一件儀器，JADE，可以觀測低於30KeV的能量。正在研究的概念之一是，來自木星自轉的能量是否被轉化進入它的大氣層和磁層。 它是由 約翰·霍普金斯大學應用物理實驗室（APL）建造，蒐集來自行星的極光磁場線、赤道磁層和極區電離層的硬輻射的原位資料。目標之一是要了解極光，以及如何將粒子加速到如此高的速度。木星的謎團之一是由兩極發出的X射線，但似乎不是來自極光環。 (zh) JEDI (Jupiter Energetic-particle Detector Instrument) is an instrument on the Juno spacecraft orbiting planet Jupiter. JEDI coordinates with the several other space physics instruments on the Juno spacecraft to characterize and understand the space environment of Jupiter's polar regions, and specifically to understand the generation of Jupiter's powerful aurora. It is part of a suite of instruments to study the magnetosphere of Jupiter. JEDI consists of three identical detectors that use microchannel plates and foil layers to detect the energy, angle, and types of ion within a certain range. It can detect electrons between 40 and 500 keV (Kilo electron-volts), and hydrogen and oxygen from a few tens of keV to less than 1000 keV (1 MeV). JEDI uses radiation hardened Application Specific Int (en) |
| rdfs:label | JEDI (en) 木星高能粒子探測儀 (zh) |
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