The Magnetospheric Multiscale Missions Fast Plasma Investigations Dual electron spectrometer development

Details The Magnetospheric Multiscale Missions Fast Plasma Investigations Dual electron spectrometer development The Magnetospheric Multiscale Missions Fast Plasma Investigations Dual electron spectrometer development

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm53a1360s&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM53A-1360

Physics

[2723] Magnetospheric Physics / Magnetic Reconnection, [2794] Magnetospheric Physics / Instruments And Techniques

Scientific paper

The Magnetospheric Multiscale mission (MMS) is designed to examine magnetic reconnection that occurs on both the Earths dayside magnetopause and in the magnetotail region on Earths night side. In order to resolve fine structures of the three dimensional electron distributions in both regions, the Fast Plasma Investigation’s (FPI) Dual Electron Spectrometer (DES) is designed to measure electron distributions with a time resolution of 30 ms. In order to achieve this unprecedented sampling rate, the DES will have eight individual spectrometers each sampling 180 x 45 degree sections of the sky. Because of the field of view limitations of top hat analyzers, each spectrometer will use electro-static deflectors to change its look direction. The engineering model of the DES has been fabricated and tested. We will present the results of measurements for fields of view, angular FWHM responses, dE/E, analyzer constant, and geometric factors for all deflection states. We will compare these results to simulation results and discuss causes of the response variations.

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