PROJECT TITLE: Cluster/HIA in-flight calibration and data quality improvement for scientific exploitation - CALYPSO

Coordinator: Institute of Space Science (ISS) 

Partners: -

Period: 29 November 2013 - 18 November 2016

Project director: Dr. Adrian Blagau

Project team:

Description: Cluster: a ESA 'cornerstone' mission; launched in the summer of 2000, 4 identical S/C that make correlated measurements in space, to study phenomena in 3-D

HIA has the objective to measure the 3-D velocity distributions of ions. Plasma density, velocity, pressure tensor can than be derived.

HIA operates on C1 and C3.

The ions moving along different directions (different polar angle) in the plane of the HIA entrance aperture are deflected and focused by the EA on the exit plane, where they are recorded by a system of position encoding anodes Coverage in azimuthal angle is achieved by using the satellite spin.

In order to cover the whole range of particle fluxes specific to various plasma regeions, HIA has two sections of different sensibilities.

Due to various factors (e.g. exposure to radiation, detector aging, adjustments in operating parameters), the HIA detection efficiency changes over time, prompting for continuous in-flight calibration.

Project objectives:

HIA in-flight absolute calibration

Statistical comparisons between HIA and WHISPER density data in various plasma environments

Anode and energy dependence of HIA in-flight efficiency

In-flight calibration of He++ measurements provided by HIA


Contributions to the STAR programme objectives:

Homepage: CALYPSO