CIS Particle Measurements Instrument

The Cluster Ion Spectrometry (CIS) instrument is used to measure the distribution of ions in terms of energy and angle, together with their composition, in the 0-to-40 keV energy range.

This objective is reached by combining two detectors with complementary features:

• The first, HIA (Hot Ion Analyser), offers a high angular resolution. It is designed to analyse the beams of highly collimated ions that should be observed in the solar wind and close to impacts.
• The second, CODIF (COmposition and DIstribution Function analyser), determines the composition of the majority ions, H⁺, He⁺⁺, He⁺ and O⁺, over 4 steradians, with good energy resolution.

Main characteristics

• HIA Detector
  
  
  • Energy range: from 5 eV/e to 32keV/e
  • Temporal resolution: 62.5 ms in 2D, 4s in 3D
  • Angular resolution: 5.6° x 5.6°
  • Instantaneous field of view: 8° x 360°
  • Mass: 2.49 kg
  • Power consumption: 3.36 W

• CODIF detector
  
  
  • Energy range: from 0 to 40 keV/e
  • Temporal resolution: 125 ms in 2D, 4 s in 3D
  • Mass resolution (M/M): 4 - 7
  • Angular resolution: 11° x 22.5°
  • Instantaneous field of view: 8° x 360°
  • Mass: 8.3 kg
  • Power consumption: 7.28 W

For more information about CIS instrument and its data, please visit the IRAP website.