author = "Melo, Pedro Dousseau Guedes de and Tan, Ing Hwie and Barroso de 
                         Castro, Joaquim Jos{\'e} and Dallaqua, Renato S{\'e}rgio",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Numerical simulation of the geometric factor of a cylindrical 
                         electrostatic analyzer to monitor electron precipitation in the 
                         South Atlantic magnetic anomaly",
              journal = "IEEE Transactions on Plasma Science",
                 year = "2016",
               volume = "44",
               number = "6",
                pages = "1009--1017",
                month = "June",
             keywords = "Cylindrical electrostatic analyzer, geometric factor, SIMION.",
             abstract = "This paper simulates the performance of a cylindrical 
                         electrostatic analyzer specially devised to measure the energy 
                         spectra of electrons precipitating in the South Atlantic Magnetic 
                         Anomaly (SAMA). Unlike its counterparts built to operate in the 
                         auroral region, the dimensions of this analyzer were designed to 
                         maximize the geometric factor, and to be the first experiment 
                         dedicated to measure the much lower fluxes in the equatorial 
                         ionosphere. The geometric factor of the analyzer was calculated 
                         based on the numerical simulation of electron trajectories coming 
                         from a calibration beam using the package SIMION 8.0. Positive and 
                         negative voltages applied to the inner and outer plates were 
                         compared to examine the analyzer's response, showing small but 
                         visible differences. Simulations at the lower and higher ends of 
                         the energy spectrum showed similar geometric factors [G] as 
                         expected with [G]/Epeak 2.9 x 10(-3) (cm(2) . sr) and AE/Epeak 
                         0.29. These results are in good agreement with semianalytical and 
                         empirical estimates. Comparisons with two analyzers designed for 
                         measurements in the auroral region showed that the simulated 
                         geometric factors are about one order of magnitude larger. Flux 
                         estimates based on aeronomic effects over the SAMA indicate that 
                         the number of counts should be sufficiently above noise level with 
                         the present analyzer design.",
                  doi = "10.1109/TPS.2016.2558320",
                  url = "http://dx.doi.org/10.1109/TPS.2016.2558320",
                 issn = "0093-3813",
             language = "en",
           targetfile = "melo_numerical.pdf",
        urlaccessdate = "27 nov. 2020"