| Autor: |
Andreas Lagg, D. T. Young, Michiko Morooka, Chris S. Arridge, Glyn Collinson, Gethyn R. Lewis, D. G. Mitchell, A. M. Persoon, Jan-Erik Wahlund, Stefano Livi, Andrew J. Coates, D. R. Linder, Abigail Rymer, L. K. Gilbert, Dhiren Kataria, Nicolas André, Geraint H. Jones, P. Schippers |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
Planetary and Space Science. 58:427-436 |
| ISSN: |
0032-0633 |
| DOI: |
10.1016/j.pss.2009.11.008 |
| Popis: |
We present the two-stage method used to calibrate the electron spectrometer (ELS), part of the plasma spectrometer (CAPS) on board the Cassini spacecraft currently in orbit around Saturn. The CAPS-ELS is a top-hat electrostatic analyser designed to measure electron fluxes between 0.5 eV and 26 keV. The on-ground calibration method described here includes the production of photoelectrons, which are energised and passed into the CAPS-ELS in a purpose designed calibration facility. Knowledge of the intensity of these incident electrons and the subsequent instrument output provides an on-ground calibrated geometric factor. Comparative studies of physical quantities such as plasma density and electron differential flux calculated using on-ground calibration factor with the quantities deduced from the wave experiment and high energy electron detector provide in-flight calibration. The results of this are presented together with a comparison of the experimentally calibrated values with simulated calibration values. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect