Jovian Auroral Distributions Experiment
Jovian Auroral Distributions Experiment (JADE) is an instrument that detects and measures ions and electrons around the a spacecraft.[1] It is a suite of detectors on the Juno Jupiter orbiter (launched 2011, orbiting Jupiter since 2016).[2] JADE includes JADE-E, JADE-I, and the EBox.[2] JADE-E and JADE-I are sensors that are spread out on the spacecraft, and the EBox is located inside the Juno Radiation Vault.[2] EBox stands for Electronics Box.[2] JADE-E is for detecting electrons from 0.1 to 100 keV, and there are three JADE-E sensors on Juno.[2] JADE-I is for detecting ions from 5 eV to 50 keV.[2] It is designed to return data in situ on Jupiter's auroral region and magnetospheric plasmas, by observing electrons and ions in this region.[3] It is primarily focused on Jupiter, but it was turned on in January 2016 while still en route to study inter-planetary space (It was several million miles from Jupiter at that time).[4]
JADE was built by Southwest Research Institute (SwRI), located in the United States in Texas.[4] Two other instruments help understand the magnetosphere of Jupiter, WAVES and MAG.[4] The JEDI instrument measures higher energy ions and electrons and JADE lower energy ones, they are complimentary.[4]
The JADE sensors, in addition to other materials, also use a special plastic designed to endure the spaceflight conditions.[5] The instrument uses special molded rings of polyether ether ketone (PEEK).[6]
Contents
JADE-E
Each of the three JADE-E electron sensors weighs 5.25 Kilograms (11.57 pounds, 0.827 stones) with dimensions of 21 cm on all sides;[7]
Each JADE-E sensor includes [7]
- top-hat electrostatic analyzer
- two deflectors
- Multi-channel plate detector
- anode ring
JADE-I
The one JADE-I sensors is a spherical top hat electrostatic analyzer combined with a time-of-flight mass spectrometer.[7] The sensor is made of nickel plated titanium metal.[7] JADE-I sensor weighs 7.55 Kilograms(16.65 pounds, 1.1889 stones).[7]
JADE-I can measure ions from 1 to 50 atomic mass units (AMU), with the ability to discern atomic hydrogen, H2+, H3+, oxygen and sulfur.[8]
See also
- JEDI
- JunoCam
- Van Allen Probes (also studies ions)
- MAVEN
- UVS (Juno)
- Microwave Radiometer (Juno)
- Waves (Juno)
- Gravity Science
References
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- ↑ [1]