The energetic NeUtral Atom Detector Unit (NUADU) for China's Double Star Mission and its calibration

McKenna‐Lawlor, S.; Baláž, J.; Strharsky, I.; Barabash, S.; Brinkfeldt, K.; Li, Lu; Shen, Chao; Shi, Jiankui; Qi, Zong; Kudela, K.; Fu, S. Y.; Roelof, E. C.; Brandt, P. C.; Dandouras, I.

doi:10.1016/j.nima.2004.04.244

Cited by 20 publications

(20 citation statements)

References 2 publications

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“…During TC-2 passed through the south pole cap, from 12:09 to 12:20 on September 14, 2004, when Dst = −50 nT, NUADU observed the evolution process of an ENA aurora (see Figure 11) [15] .…”

Section: Ena Auroramentioning

confidence: 98%

“…These waves are of internal, propagate toward the tail flanks and exist in a large area (more than 5 R E distances in the Sun-Earth direction) of the magnetotail (see Figure 9) [13] . [14][15][16] NUADU is one of the most advanced imaging payload aboard TC-2 spacecraft which is still operating around the near Earth polar orbit after losing of HENA/IMAGE. This instrument enables telemeter ENA spatial distribution and its temporal evolution in the ring current region, which was important in investigation of the processes of storm and substorm.…”

Section: Exploration Of Neutral Sheet Of Kink Like Wave Type [13]mentioning

confidence: 99%

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New progress of Double Star-Cluster joint exploration and study

Liu

Cao

et al. 2008

Sci. China Ser. E-Technol. Sci.

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The magnetic reconnection of magnetosphere and the magnetospheric space storms (including magnetospheric substorm, magnetic storm, magnetospheric particle storm) has long been one of the most challenging subjects in the solar-terrestrial physics. The reconnection mechanism and global triggering process of the magnetospheric space storms are still unclear up to now. Based on the Double Star Program (DSP) and Cluster joint measurements, we have observed the solar wind density hole, the component magnetic field reconnection in the magnetopause, the structures of magnetic storm ring current, global and multi-scale driven and triggering processes of magnetospheric substorm. In this paper we will briefly introduce these results. solar wind, magnetic reconnection, magnetospheric substorm, magnetic storm Magnetic reconnection at the magnetopause is the primary mechanism responsible for the transfer of solar wind energy into the magnetosphere. Previous observations have considerably increased the understanding of this key process in the solar wind-magnetosphere coupling. However, some fundamental questions remain unclear. It is not yet known which process dominates the dayside magnetic reconnection when a non-zero interplanetary magnetic field (IMF) B y is present, anti-parallel merging at high latitudes [1,2] , or component merging at low latitudes near the subsolar point [3,4] . Whether reconnection can operate in the dayside low-latitude magnetopause for northward IMF B z is also a matter of ongoing discussions. How the flux transfer events (namely, the open flux ropes) are formed and how their global pattern looks like those formed FTE are still unclear and of interest to the community of space science. Another challenging problem in space plasma research is the quest for the physical processes responsible for the onset of magnetospheric substorms that are generally considered to be akin to many phenomena related to the energetic storage and explosion observed throughout the plasma universe. There are many substorm onset

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“…During TC-2 passed through the south pole cap, from 12:09 to 12:20 on September 14, 2004, when Dst = −50 nT, NUADU observed the evolution process of an ENA aurora (see Figure 11) [15] .…”

Section: Ena Auroramentioning

confidence: 98%

Section: Exploration Of Neutral Sheet Of Kink Like Wave Type [13]mentioning

confidence: 99%

New progress of Double Star-Cluster joint exploration and study

Liu

Cao

et al. 2008

Sci. China Ser. E-Technol. Sci.

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“…It is possible to integrate N spins onboard within the range N = 2-32 to achieve better statistics. See McKenna-Lawlor et al [11] for a more detailed description of the NUADU instrument.…”

Section: Nuadu Measurementsmentioning

confidence: 99%

Iterative inversion of global magnetospheric information from energy neutral atom (ENA) images recorded by the TC-2/NUADU instrument

McKenna‐Lawlor

Barabash

et al. 2008

Sci. China Ser. E-Technol. Sci.

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A method is presented for retrieving the magnetospheric ion distribution from Energetic Neutral Atom (ENA) measurements made by the NUADU instrument on the TC-2 spacecraft. Based on the already well-established method of constrained linear inversion, an iterance technique suitable for the low count ENA measurements has been developed which is tolerant of the noise background. By the iterance technique, it is possible for the first time to simultaneously retrieve the magnetospheric ion distribution and the exospheric neutral density, and further to recover global ENA emissions in three dimensions. The technique is applied to a representative ENA image recorded in energy channel 2 (protons: 50-81 keV) of the NUADU instrument during a major geomagnetic storm and it is, thereby, shown that the retrieval method developed provides a useful tool for extracting ion distribution information from ENA data.Energetic Neutral Atom (ENA), ring current, magnetospheric ions, exospheric neutral density

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“…During the measurements, the responses of all 16 detectors to the various beams were determined (see Figs. 7 and 8), and the corresponding output pulse heights from the NUADU amplifiers were recorded using a multi-channel analyser (for details, see McKenna-Lawlor et al, 2004). For 150 keV Hydrogen, the energy resolution at FWHM was, thereby, found to be 8%.…”

Section: Energy Calibration Of Nuadumentioning

confidence: 99%