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Modeling the response of a top hat electrostatic analyzer in an external magnetic field: Experimental validation with the Juno JADE‐E sensor
Author(s) -
Clark G.,
Allegrini F.,
McComas D. J.,
Louarn P.
Publication year - 2016
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1002/2016ja022583
Subject(s) - jade (particle detector) , spectrum analyzer , magnetic field , range (aeronautics) , physics , jovian , electron , field (mathematics) , computational physics , energy (signal processing) , optics , materials science , nuclear physics , mathematics , particle physics , quantum mechanics , planet , astrophysics , saturn , pure mathematics , composite material
We investigate the response function of an electrostatic analyzer when electron gyroradii in a magnetic field become comparable to the scale size of the sensor. This occurs when electrons have sufficiently small energies and are in a strong magnetic field. Through simulations and laboratory experiments with the Jovian Auroral Distribution Experiment‐Electron (JADE‐E) sensor, we observe the energy response, detection angle distribution, and geometric factor to change significantly. Using electro‐optics simulation results, we develop semiempirical and empirical relationships that can be used for top hat electrostatic analyzers. We present a model based on these relationships that covers an energy range between 0.1 keV and 5 keV with a uniform external magnetic field magnitude between 0–3 G and verified that these relationships apply to JADE‐E in a specially designed testing environment by comparing with the model. We find that the model agrees well with the JADE‐E sensor validating it for top hat electrostatic analyzers more generally.