Remote Sensing of Planetary Magnetospheres: Mass and Energy Analysis of Energetic Neutral Atoms

2013 ◽  
pp. 159-164 ◽  
Author(s):  
K. C. Hsieh ◽  
C. C. Curtis
Keyword(s):  
Remote Sensing ◽  
Energy Analysis ◽  
Neutral Atoms ◽  
Planetary Magnetospheres ◽  
Energetic Neutral Atoms

Solar wind interaction with the lunar surface: Observation of energetic neutral atoms on the lunar surface by the Advanced Small Analyzer for Neutrals (ASAN) instrument on the Yutu-2 rover of Chang'E-4.

2020 ◽  
Author(s):  
Martin Wieser ◽  
Stas Barabash ◽  
Xiao-Dong Wang ◽  
Aibing Zhang ◽  
Chi Wang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Solar Wind ◽  
Lunar Surface ◽  
Lunar Regolith ◽  
Remote Sensing Data ◽  
High Porosity ◽  
Neutral Atoms ◽  
Solar Wind Interaction ◽  
Energetic Neutral Atoms ◽  
Nominal Performance

<p>A fraction of up to 20% of the solar wind impinging onto the lunar surface is reflected as energetic neutral atoms back to space, as established by remote sensing, e.g. by the SARA instrument on Chandrayaan-1 or by IBEX. Mapping of these reflected energetic neutral atoms to the surface opened a new way to remotely study the solar wind precipitation onto the surface. However, the high reflection rate remained an enigma given the high porosity of the lunar regolith, but no measurements directly on the surface were available.</p><p>With the Advanced Small Analyzer for Neutrals (ASAN) mounted on the Yuyu-2 the rover of Chang'E-4, for the first time measurements of the energetic neutral atom flux originating from the lunar surface were preformed directly on the lunar surface itself. ASAN measures with a single angular pixel the energy spectrum of energetic neutral atoms reflected or sputtered form the surface with coarse mass resolution. ASAN uses the mobility of the rover to cover different solar wind illumination angles and scattering angles from the surface.</p><p>Since the landing of Chang'E-4 in the Von Kármán crater on the lunar far side in January 2019, ASAN has spent more than one year on the lunar surface and performed typically two measurement sessions per lunar day with nominal performance.</p><p>We review the ASAN instrument status and operations; present energy and mass spectra of energetic neutral atoms backscattered and sputtered from the surface, and discuss sputtering yields observed during different observation sessions. We put these observations into context of earlier remote sensing data by the SARA instrument on Chandrayaan-1.</p>

Remote sensing of Mercury's magnetospheric plasma environment via energetic neutral atoms imaging

2001 ◽  
Vol 49 (14-15) ◽  
pp. 1659-1668 ◽  
Author(s):  
Stefano Orsini ◽  
Anna Milillo ◽  
Elisabetta De Angelis ◽  
Andrea Maria Di Lellis ◽  
Vincenzo Zanza ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Magnetospheric Plasma ◽  
Neutral Atoms ◽  
Plasma Environment ◽  
Energetic Neutral Atoms

scholarly journals Titan's exosphere and its interaction with Saturn's magnetosphere

2008 ◽  
Vol 367 (1889) ◽  
pp. 743-752 ◽  
Author(s):  
Iannis Dandouras ◽  
Philippe Garnier ◽  
Donald G Mitchell ◽  
Edmond C Roelof ◽  
Pontus C Brandt ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Remote Sensing ◽  
Charge Exchange ◽  
Mass Spectrometer ◽  
Upper Atmosphere ◽  
Neutral Atoms ◽  
Energetic Ions ◽  
Imaging Instrument ◽  
Singly Charged

Titan's nitrogen-rich atmosphere is directly bombarded by energetic ions, due to its lack of a significant intrinsic magnetic field. Singly charged energetic ions from Saturn's magnetosphere undergo charge-exchange collisions with neutral atoms in Titan's upper atmosphere, or exosphere, being transformed into energetic neutral atoms (ENAs). The ion and neutral camera, one of the three sensors that comprise the magnetosphere imaging instrument (MIMI) on the Cassini/Huygens mission to Saturn and Titan, images these ENAs like photons, and measures their fluxes and energies. These remote-sensing measurements, combined with the in situ measurements performed in the upper thermosphere and in the exosphere by the ion and neutral mass spectrometer instrument, provide a powerful diagnostic of Titan's exosphere and its interaction with the Kronian magnetosphere. These observations are analysed and some of the exospheric features they reveal are modelled.

What Does Our Heliosphere Look Like in Energetic Neutral Atoms? Some Recommendations for a Low-Energy ENA Camera Onboard the Interstellar Probe

2019 ◽  
Author(s):  
André Galli ◽  
Peter Wurz ◽  
Jens Kleimann ◽  
Horst Fichtner ◽  
Yoshifumi Futaana ◽  
...  
Keyword(s):  
Low Energy ◽  
Neutral Atoms ◽  
Energetic Neutral Atoms ◽  
Interstellar Probe

Imaging Saturns dust rings using energetic neutral atoms

1998 ◽  
Vol 46 (9-10) ◽  
pp. 1349-1362 ◽  
Author(s):  
B.H. Mauk ◽  
S.M. Krimigis ◽  
D.G. Mitchell ◽  
E.C. Roelof ◽  
E.P. Keath ◽  
...  
Keyword(s):  
Neutral Atoms ◽  
Energetic Neutral Atoms
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