Examinando por Autor "Hernando, Carlos"

Mostrando 1 - 2 de 2

Restringido
Dosimeter for The Two Towers in SEOSAT-INGENIO Based on the TMP36 Temperature Sensor
(Institute of Electrical and Electronics Engineers, 2013-05-14) González Guerrero, M.; Jiménez Martín, Juan José; Hernando, Carlos; Álvarez, Maite; Guerrero, H.; Instituto Nacional de Técnica Aeroespacial (INTA)
A dosimeter for space applications is presented. It is based on the ionization damage affecting the TMP36 sensors when they are exposed to external radiation, which produces an increase of their output voltages. This work explains the configuration, sensing mechanism and working modes of this device and reports the results obtained in a gamma radiation test carried out in March 2012. The test results allow us to select the mode of operation that provides the highest response to the TID, as well as the most sensitive devices. The highest sensitivity is above 100 μV/rad. This dosimeter is part of The Two Towers radiation monitor that will fly on board of the SEOSAT-INGENIO satellite.
Restringido
Proton monitor las dos torres: First Intercomparison of In-Orbit Results
(Institute of Electrical and Electronics Engineers, 2012-03-09) Jiménez Martín, Juan José; Oter, J. M.; Apéstigue, Víctor; Hernando, Carlos; Ibarmia, S.; Hajdas, W.; Sanchez Péramo, J.; Álvarez, Maite; Arruego, Ignacio; Guerrero, H.; Instituto Nacional de Técnica Aeroespacial (INTA)
A new proton monitor on board NANOSAT-1B-Las Dos Torres (translated: The Two Towers)-and its preliminary results after two years in orbit and its intercomparison to a RadFET and to trapped proton models are presented. This satellite was fully developed by INTA (National Institute of Aerospace Technology, Spain) and was launched on July 29, 2009. The instrument includes two stacks of radiation-sensing elements: the "dark" and "light" towers. The displacement damage was measured, both through the increase of a photodiode dark current ("dark tower") and the decrease of the photocurrent signal in a photodiode optically linked to light emitting diodes ("light tower"). The instrument was also designed to monitor the ionization current of the photodiodes and the variations in the proton flux in the South Atlantic Anomaly.