What is Fermilab? - Run II Newscasts - Analyze the Data - Particle Physics Bibliography
One of the two detectors for colliding particles at Fermilab is called CDF. That originally stood for Colliding Detector Facility, but everyone calls it "CDF." The original detector has been upgraded to give better identification of particles. Usually, you cannot see anything except the surrounding concrete blocks, but these photos show it when it was partially dismantled.

The front of the detector is shown on the left.
Notice the size of the person in this photo.

This sketch shows the layers of the upgraded detector.
The beam pipe for the protons is shown on the right.
More images of CDF.

Anatomy of a Detector - Identifying Particles - D0 Detector - CDF Detector - Links