Title :
Clementine RRELAX SRAM particle spectrometer
Author :
Buehler, M.G. ; Soli, G.A. ; Blaes, B.R. ; Ratliff, J.M. ; Garrett, H.B.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
The Clementine RRELAX radiation monitor chip consists of a p-FET total dose monitor and a 4-Kbit SRAM particle spectrometer. Eight of these chips were included in the RRELAX and used to detect the passage of the Clementine (S/C) and the innerstage adapter (ISA) through the Earth´s radiation belts and the 21-Feb 1994 solar flare. This is the first space flight for this 1.2-/spl mu/m rad-soft custom CMOS radiation monitor. This paper emphasizes results from the SRAM particle detector which showed that it (a) has a detection range of five orders of magnitude relative to the 21-Feb solar flare, (b) is not affected by electrons, and (c) detected microflares occurring with a 26.5 day period.<>
Keywords :
CMOS memory circuits; SRAM chips; integrated circuit testing; radiation effects; solar flares; space vehicle electronics; 1.2 micron; 26.5 d; 4 Kbit; Clementine RRELAX radiation monitor chip; SRAM particle spectrometer; innerstage adapter; microflares; p-FET total dose monitor; rad-soft custom CMOS radiation monitor; radiation belts; solar flare; space flight; Belts; Earth; Electrons; Instruction sets; Moon; Radiation detectors; Radiation monitoring; Random access memory; Space vehicles; Spectroscopy;
Journal_Title :
Nuclear Science, IEEE Transactions on
