@Article{MeloTanBarrDall:2016:NuSiGe,
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 abr. 2024"
}