We have a design [special characteristics of the detector] which is entirely based on a single magnet, a high field solenoid. The first thing one actually does in the design of the experiment is actually to figure out the magnetic field configuration for the measurement of muons. That then determines the rest of the design. The detector is built such that [see diagram] the first layer is within a tracker, which is all silicon.

"Discovery machine; Interview with Dr. Jim Virdee," 2010