Considerations for the Next Compton Telescope Mission
The GRAPWG has identified a high resolution Compton telescope as the highest
priority major mission in gamma ray astrophysics following GLAST. This mission
should provide 25-100 times improved sensitivity, relative to CGRO and INTEGRAL,
for MeV gamma ray lines. It must have good performance for narrow and
broadened lines and for discrete and diffuse emissions. Several alternative
instrumental approaches are being pursued to achieve these goals.
We discuss issues relating to this mission, including alternative detector
concepts, instrumental configurations, background reduction techniques, orbits,
and the need for international participation.
A germanium compton telescope with ~ 1 square meter of position-sensitive
germanium detectors was the basis for one of the GRAPWG concepts.
Preliminary monte carlo estimates for the sensitivies of this instrument are
encouraging. However, can such an instrument be built within current cost limits
for new initiatives? And can the formidable technical challenges of cooling
large volumes of Ge and providing the large number of spectroscopy channels
We have pursued the development of position-sensitive solid-state detectors
(Ge, Si) for a high spectral resolution Compton telescope mission. Recent
progress on the capabilities and technical issues for such a mission will
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.