<B>What Can GLAST Say about the Origin of Galactic Cosmic Rays?</B>
<PRE>Jonathan F. Ormes, Seth Digel, Igor Moskalenko, and Alexander Moiseev, 
	Goddard Space Flight Center, Greenbelt, Maryland
and Roger Williamson 
	Stanford University, Palo Alto, California
on behalf of the GLAST collaboration</PRE>
Gamma rays in the band from 30 MeV to 300 GeV, used in combination with direct 

measurements and with data from radio and X-ray bands, provide a powerful tool 

for studying the origin of galactic cosmic rays.  Gamma-ray Large Area Space 

Telescope (GLAST) will map supernova remnants and the galactic diffuse gamma 

radiation from the collision of cosmic rays with gas and dust on angular scales 

as fine as 10-20 arcmin.  GLAST will be able to look for signatures of the 

acceleration of cosmic-ray nuclei by looking at the spatial and spectral 

structure of the gamma rays from supernova, molecular clouds and other galactic 

concentrations of matter.  GLAST can study the acceleration of energetic 

particles in supernova shocks, their transport in the interstellar medium and 

their penetration into clouds.