The specific aspect that this investigation focuses on are the electrons that enter LEMS30.  The instrument has been designed such that these electrons are deflected into the back of the CA, as shown in Figure A9-2.  The detector is able to differentiate four energy ranges of electrons, which are denoted as energy passbands DE1-DE4.  Since it is impossible for the more massive ions to experience such a deflection, the count rates for these channels are purely electrons.  It is the goal of this study to determine the geometric factor for these deflected electrons for the four energy channels.

Figure A9-2  Electrons entering the LEMS30 aperture are deflected into the back of the Composition Aperture.