Session 2: Solar, Planetary and Space Physics

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.