EXCEED: an extreme ultraviolet spectrometer onboard SPRINT-A

The extreme ultraviolet (EUV) telescope EXCEED (Extreme Ultraviolet Spectroscope for Exospheric Dynamics) onboard the Japan's small satellite SPRINT-A will be launched in August 2013. The EXCEED instrument will observe tenuous gases and plasmas around the planets in the solar system (e.g., Mercury, Venus, Mars, Jupiter, and Saturn). The EXCEED instrument is designed to have a spectral range of 60-145 nm with a spectral resolution of 0.4-1.0 nm. The instrument has a field of view of 400” x 140” (maximum), and the attitude fluctuations are stabilized within ±5". The optics of the instrument consists of an entrance mirror with a diameter of 200 mm, three types of slits, two types of filters, a laminar type grating, and a 5-stage microchannel plate assembly with a resistive anode encoder. In this paper, we report the general mission overview, the instrumentations, and the results of ground calibrations.

[1]  J. P. Dubois,et al.  SPICAV on Venus Express: Three spectrometers to study the global structure and composition of the Venus atmosphere , 2007 .

[2]  Atsushi Yamazaki,et al.  Development of the EUV detector for the BepiColombo mission , 2006 .

[3]  Fuminori Tsuchiya,et al.  Feasibility study of EUV spectroscopic observation of the Io plasma torus from the earth-orbiting satellite EXCEED , 2012 .

[4]  Giampiero Naletto,et al.  PHEBUS: A double ultraviolet spectrometer to observe Mercury's exosphere , 2010 .

[5]  Go Murakami,et al.  High-resolution imaging detector using five microchannel plates and a resistive anode encoder. , 2010, Applied optics.

[6]  Andrew J. Steffl,et al.  Cassini UVIS observations of the Io plasma torus. II. Radial variations , 2004 .

[7]  Anton S. Tremsin,et al.  UV radiation resistance and solar blindness of CsI and KBr photocathodes , 2000, 2000 IEEE Nuclear Science Symposium. Conference Record (Cat. No.00CH37149).

[8]  Ichiro Yoshikawa,et al.  Multilayer coating for 30.4nm , 2005 .

[9]  Go Murakami,et al.  Optical performance of PHEBUS/EUV detector onboard BepiColombo , 2012 .

[10]  Atsushi Yamazaki,et al.  EUV observation from the Earth-orbiting satellite, EXCEED , 2010 .

[11]  Mats Holmström,et al.  Solar forcing and planetary ion escape from Mars , 2008 .

[12]  Masayuki Kikuchi,et al.  Telescope of extreme ultraviolet (TEX) onboard SELENE: science from the Moon , 2008 .

[13]  Peter A. Delamere,et al.  Modeling Variability of Plasma Conditions in the Io Torus , 2003 .

[14]  Fuminori Tsuchiya,et al.  Plan for Observing Magnetospheres of Outer Planets by Using the EUV Spectrograph Onboard the Sprint-A Mission , 2011 .

[15]  Helmut Lammer,et al.  Loss of hydrogen and oxygen from the upper atmosphere of Venus , 2006 .

[16]  Atsushi Yamazaki,et al.  Terrestrial plasmaspheric imaging by an Extreme Ultraviolet Scanner on planet‐B , 2000 .

[17]  Masayuki Kikuchi,et al.  First sequential images of the plasmasphere from the meridian perspective observed by KAGUYA , 2010 .

[18]  Atsushi Yamazaki,et al.  Development of a compact EUV photometer for imaging the planetary magnetosphere , 2001 .

[19]  Kouichi Sakai,et al.  Performance of Y2O3∕Al multilayer coatings for the He-II radiation at 30.4 nm. , 2011, The Review of scientific instruments.

[20]  Atsushi Yamazaki,et al.  Photometric measurement of cold helium ions in the magnetotail by an EUV Scanner onboard planet‐B: Evidence of the existence of cold plasmas in the near‐Earth plasma sheet , 2000 .

[21]  Atsushi Yamazaki,et al.  Development of an extreme ultraviolet imaging spectrometer for the BepiColombo mission , 2004 .

[22]  B. Shizgal,et al.  Nonthermal escape of the atmospheres of Venus, Earth, and Mars , 1996 .

[23]  R. S. Turley,et al.  The Extreme Ultraviolet Imager Investigation for the IMAGE Mission , 2000 .

[24]  Fuminori Tsuchiya,et al.  The Exceed Mission , 2011 .