6 October 2011 A collimator for measurements of the loss cone flux of energetic electrons
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An energetic electron collimator for the measurement of loss cone fluxes in the Earth's radiation belts is presented. This design addresses the problem of measuring low intensity fluxes in the presence of a large omni-directional background flux. This disc loaded collimator comprises stainless steel baffles and tungsten vanes. Electron rejection is accomplished via baffle spacing with baffles placed more closely deep within the collimator. The collimator was fabricated. Its response was validated at the Goddard Spaceflight Center's Radiation Effects Facility. The baffled design shows an angular cutoff of three orders of magnitude at the geometric cutoff angle for electron energies less than 150 keV.
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James D. Sullivan, James D. Sullivan, Charles W. Parker, Charles W. Parker, } "A collimator for measurements of the loss cone flux of energetic electrons", Proc. SPIE 8148, Solar Physics and Space Weather Instrumentation IV, 814802 (6 October 2011); doi: 10.1117/12.892795; https://doi.org/10.1117/12.892795

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