The NUADU experiment on TC-2 and the first Energetic Neutral Atom (ENA) images recorded by this instrument

McKenna-Lawlor, S.; Li, L.; Barabash, S.; Kudela, K.; Balaz, J.; Strharsky, I.; Brinkfeldt, K.; Gunell, H.; Shen, C.; Shi, J.; Cao, J.-B.; Zong, Q.; Fu, S-Y.; Roelof, E. C.; Brandt, P. C.; Dandouras, I.

The Earth’s ring current and how it responds to varying interplanetary conditions is described and an account provided of the production of Energetic Neutral Atoms (ENAs) in the geo-corona. Also, the potential to remotely monitor, on a global scale, the temporal and spatial evolution of magnetospheric plasma populations through analysing ENA images recorded during magnetic storms/substorms is indicated. A technical account of the Energetic NeUtral Atom Detector Unit NUADU aboard China’s TC-2 mission (measurement range 45–>158 keV) follows, together with an account of the scientific objectives of NUADU, both in stand-alone mode and in the context of multi-point imaging. Low altitude ENA emissions recorded by NUADU during south polar passages of TC-2 at the time of a moderate magnetic storm in September 2004, as well as bright ring current emissions recorded in November 2004 during a major geomagnetic storm, are presented and discussed in the context of various, accompanying, terrestrial disturbances. Also, ENA observations of the November 2004 ring current imaged simultaneously by TC-2/NUADU and by IMAGE/ HENA (viewing, respectively, from the Northern and Southern Hemispheres), are compared.

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McKenna-Lawlor, S. / Li, L. / Barabash, S. / et al: The NUADU experiment on TC-2 and the first Energetic Neutral Atom (ENA) images recorded by this instrument. 2005. Copernicus Publications.

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