1 / 5

Electron Spectrometer

Electron Spectrometer. On Swarm. On the Advantage of a Particle Experiment. B is integrated property: sum of contributions from all electric currents j in the Earth’s core, ionosphere, but also on the spacecraft ...

india
Download Presentation

Electron Spectrometer

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electron Spectrometer On Swarm 28.04.2005 | 9th MAG meeting, ESTEC, June 22-23, 2005 | page 1

  2. On the Advantage of a Particle Experiment • B is integrated property: sum of contributions from all electric currents jin the Earth’s core, ionosphere, but also on the spacecraft ... • In-situ measurement of electric field E with EFI, and of localcurrent density j with curl-B technique • These currents have only minor directeffect on estimation of core and crustal fieldsince they are (mathematically) orthogonal to a potential field • But they have a significant indirect impact, since they feed ionospheric currents, J(ionospheric currents are internal for Swarm, and may therefore disturb internal field models) • Missing link: ionospheric conductivity Sproduced by electron precipitation (at polar latitudes) Particle experiment provides information on ionospheric conductivity S 28.04.2005 | 9th MAG meeting, ESTEC, June 22-23, 2005 | page 2

  3. Concept Electron Spectrometer 28.04.2005 | 9th MAG meeting, ESTEC, June 22-23, 2005 | page 3

  4. Block Diagram 28.04.2005 | 9th MAG meeting, ESTEC, June 22-23, 2005 | page 4

  5. Resource Requirements and Specifications • Mass 1 kg • Power 3 w • Size 0.1 x 0.2 x 0.1 m • Field-of-view 210º x 10º, 16 Sectors • 64 Energy Levels • Energy Range 10 eV – 30 keV • Energy Resolution ΔE/E = <8% • Field-of-view in orbit plane (B-field plane) • Data Rate 2 kb/sec compressed 90% • Purge required • Cost Estimate 2 M€ for STM-EM-3 FM-QM/FS • Consortia DNSC – IRF - RIT 28.04.2005 | 9th MAG meeting, ESTEC, June 22-23, 2005 | page 5

More Related