Editing Advanced Composition Explorer (section)

=== Cosmic-Ray Isotope Spectrometer (CRIS) ===
[[File:ACE-cris sm.jpg|thumb|CRIS]]
The Cosmic-Ray Isotope Spectrometer covers the highest range of the Advanced Composition Explorer's energy coverage, from 50 to 500 MeV/nucleon, with an isotopic resolution for elements from Z ≈ 2 to 30. The nuclei detected in this energy interval are predominantly [[cosmic rays]] originating in our Galaxy. This sample of galactic matter investigates the nucleosynthesis of the parent material, as well as fractionation, acceleration, and transport processes that these particles undergo in the Galaxy and in the interplanetary medium. Charge and mass identification with CRIS is based on multiple measurements of dE/dx and total energy in stacks of [[Semiconductor detector|silicon detector]]s, and trajectory measurements in a scintillating optical fiber trajectory (SOFT) [[hodoscope]]. The instrument has a geometrical factor of {{cvt|250|cm2}}-sr for isotope measurements.<ref name=stone98b>{{cite journal |last=Stone |first=E. C. |title=The Cosmic-Ray Isotope Spectrometer for the Advanced Composition Explorer |journal=Space Science Reviews |date=July 1998 |volume=86 |pages=285–356 |doi=10.1023/A:1005075813033 |bibcode=1998SSRv...86..285S |display-authors=et al. |citeseerx=10.1.1.38.7241 |s2cid=12773394}}</ref>