Double Camera Test for the CMS Muon Barrel Position Monitoring System.

This note describes the preliminary tests for the Compact Muon Solenoid Position Monitoring System and in particular, the testing of a crucial optical component called the double camera. We focus on the computer simulation of this device using the Simulgeo language and the examination of the performance of this model in the laboratory. The ability of the system to reconstruct the positions of various elements in the opto-geometrical set up was found to agree well with the resolutions predicted by error propagation techniques.