Electron_spectrometer

Copyright WDC C1 for STP at RAL.

This was supplied by the Rutherford Appleton Laboratory. This instrument used twin electrostatic analysers to measure the electron distribution over the energy range from 6 eV to 25 keV. It could be commanded to operate in a variety of modes, e.g. (i) a full energy scan from 12 eV to 25 keV in one second; (ii) scans from 12 eV to 25 keV and from 12 to 680 eV in alternate seconds. Unlike for the ions, there is no problem of resolving the solar-wind electron distribution since electron thermal velocities are generally higher than the bulk solar-wind velocity. Full details are available in the following paper:

• H M Shah et al., The electron experiment on AMPTE UKS, IEEE Transactions on Geoscience and Remote Sensing, Vol GE-23, No. 3, May 1985, 293-300.

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