This dissertation explores the application of a mechanically collimated imaging device known as a rotating modulation collimator (RMC) to the orphan source search problem. Orphan sources are lost radioactive sources (accidentally or through material diversion) that can pose a threat to both human health and national security when they fall into the wrong hands. The RMC is a simple imaging system that can see through complex background scenes that can often mask these lost sources.This feature is limited however by backlash in the timing belt as well as the fractional conversion factor between the stepper motor and driver tube pulleys. A more elegant solution is the addition a high resolution rotary position encoder deviceanbsp;...
|Title||:||A Rotating Modulation Imager for the Orphan Source Search Problem|
|Publisher||:||ProQuest - 2008|