Title :
RADFET dosimeters in the belt: The Van Allen Probes on day 365
Author :
Holmes-Siedle, A.G. ; Goldsten, J.O. ; Maurer, R.H. ; Peplowski, P.N.
Author_Institution :
REM Oxford Ltd., Oxford, UK
Abstract :
Van Allen Probes spacecraft VAP-A and -B, launched over a year ago [August 2012], carried 16 pMOS RADFETs into an orbit designed by NASA to probe the heart of the trapped-radiation belts. Nearly 350 days of in situ measurements from the Engineering Radiation Monitor (ERM) (a) demonstrated strong variations of dose rates with time, (b) found a critical correlation between its RADFET dosimeter and Faraday cup data on charged particles, and (c) mapped the belts by measuring variation with orbit altitude. This paper provides update on early results given in [1] along with details and discussion of the RADFET dosimetry analysed.
Keywords :
Faraday effect; artificial satellites; dosimeters; radiation belts; radiation monitoring; ERM; Faraday cup; RADFET dosimeter; VAP-A; VAP-B; Van Allen probes spacecraft; charged particles; engineering radiation monitor; in situ measurement; orbit altitude; pMOS RADFET; trapped radiation belts; Belts; Extraterrestrial measurements; Monitoring; Orbits; Probes; Radiation effects; Space vehicles; RADFET; Van Allen Probes; detectors; dosimetry; radiation damage; radiation environment; radiation hardening; spacecraft dielectric charging currents;
Conference_Titel :
Radiation and Its Effects on Components and Systems (RADECS), 2013 14th European Conference on
Conference_Location :
Oxford
DOI :
10.1109/RADECS.2013.6937363
