Solar Isotope Spectrometer
(SIS)


for the Advanced Composition Explorer (ACE)

The Solar Isotope Spectrometer provides isotopically resolved measurements of the elements from lithium to zinc over the energy range 10 - 100 MeV/nucleon. The SIS dectector system consists of two identical telescopes composed of stacks of large-area solid-state detectors. The front two detectors in each telescope are a hodoscope system made up of two-dimensional position-sensitive detectors which determine the trajectory of the particles through the telescope. By combining several measurements of the energy loss, it is possible to determine the charge, mass, and energy of nuclei that stop in the detector stack. The SIS geometry factor is ~40 cm ² sr.

SIS photo stamp gif SIS photo 240 KB GIF

SIS is a new instrument that was developed by:


Caltech ACE/SIS web page
Return to ACE home pageReturn to ACE Home Page
Author and Curator: Eric R. Christian (erc@cosmicra.gsfc.nasa.gov)
Responsible NASA Official: Tycho von Rosenvinge (tycho@lheamail.gsfc.nasa.gov)
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    This file was last modified on Thursday, 15-Feb-2001 11:50:24 EST