FDC Beam hole size
From GlueXWiki
Here is a brief simulation study aimed at helping give insight as to the affect the FDC beam hole size will have on the acceptance of forward going tracks.
A set of 20 simulations were done throwing 1000 events each with 1 π+ per event. The geometry of the FDC was modified to have both the Copper Kapton and the Rohacell backing extend all the way down to the beam line. This was done to allow software cuts on the radius of the beam hole.
The particles were thrown with a momentum of 0.25, 0.5, 1.0, 2.0, and 4.0 GeV/c for each of the following angles: 0.5, 1.0, 2.0, and 4.0 degrees.
