Title: The NUADU (NeUtral Atom Detector Unit) Experiment
for the Solar Satellite of China’s Double Star mission.
Author(s): Susan McKenna-Lawlor , Stas Barabash , Zhenxing
Liu, Chao. Shen and Jan Balaz (Poster)
The Double Star (DS)
Mission of the Centre for Space
Science and Applied Research
(CSSAR) at Beijing, China consists of one Equatorial
and one Polar Earth orbiting
spacecraft which will jointly make various scientific observations of
the close Earth environment in tandem with complementary observations
made by the (already launched) four Cluster
Spacecraft of the European
Space Agency (ESA). The expected date of launch of Double Star Equatorial is December 2002. The launch of Double
Star Polar (DSP) is
scheduled for May 2003.
An account is provided of the NUADU (NeUtral Atom Detector Unit)
instrument which is designed to detect energetic neutral atoms (ENAs)
onboard Double Star (Polar). This instrument has imaging
capability over full 4p
solid angle with resolution 16 x 128 pixels (elev. x azim), and energy
resolution in four channels.
Various scientific objectives of the
experiment which involve making measurements of the temporal and spatial
variations of, and thereby studying the dynamics of, particles of (a)
the ring current; (b) the radiation belt and (c) the near–Earth plasma
sheet during quiet times and storm times, will be discussed. Also, a
proposed study of the triggering and development of geomagnetic storms
and sub-storms using global ENA images will be outlined.