Clementine RRELAX SRAM particle spectrometer

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.<>