CDF experiment:
- Example Z events: Two events are
shown, one Z --> two electrons and one Z --> two muons.
Each event has a tracking view showing the charged tracks in the
bend plane (we call this the r-phi view for radius-azimuth) of
the the 1.4 Tesla CDF solenoid magnet. The diameter of the circle
is about 3 meters. The "lego" plot is also shown for
each event -- with "stacks" of electromagnetic (red)
and hadronic (blue) energy seen in the calorimeter towers. Think
of this "lego" plot as the surface of a cylinder around
the solenoid unwrapped into a plane. Note in the Z--> two muon
event the calorimeter energy scale is very small since the muons
penetrate the calorimeter and leave only "minimum ionizing"
pulse height. So we identify the muons from their charged tracks
and hits in the Muon Chambers represented by the square box drawn
outside of the 3 meter tracking circle. This box is not drawn
to scale -- in the experiment the box is about 10 meters by 10
meters. Look closely to see the "hits", drawn as x's
in line with nearly straight (therefore high momentum) tracks
in the circle. In the lego plot we have drawn vertical lines to
represent the energy of the muon tracks. Note the difference in
the Z --> ee event where there are straight tracks pointing
at clumps of red (electromagnetic) energy and no hits in the muon
chambers.
- "GOLDEN" Top Event -
This event has a 109 GeV e+, and 4 Jets of (1) 90, (2) 77,
(3) 64, and (4) 38 GeV. Jets (1) & (4)are tagged
as b-jets by the CDF Silicon Vertex Detector. Jets (1,2,3) are
from top; (2) & (3) are from a W. The event fit gives a Top
Quark Mass of 170 +- 10 GeV.
- CDF Central Detector: In this
closeup of the central part of the CDF detector one can see various
detector elements, as well as some of the cables and electronics
used to collect information from the parts of the detector. The
boxes mounted on the face of the orange structure contain electronics.
The black semicircles to the right and left are the hadronic calorimeters.
They detect particles known as hadrons by causing the particle
to collide many times with iron plates. In these collisions, other
particles are produced. These particles cross sheets of scintillating
plastic where they give off small flashes of light. A measurement
of the total amount of light measures the energy of the hadron.
- CDF Forward Detectors :
The central detector represents about 1/3 of the total detector.
There are also two forward detectors; so named because they are
arranged along the main accelerator beam in front of and in back
of the central detector. In this photograph, one can see these
detectors in the assembly hall area outside the main machine before
they were installed.
- 3-Dimensional COLOR View of CDF
in Collider Run I, 1992-96
- Schematic COLOR Quarter Section
of most of CDF in Collider Run I, 1992-96: Highly schematic
CDF drawing designed for conference talks. Same view as the above
quarter section, but with more emphasis on the central detector
and tower geometry. Note that the position and size of the forward
calorimeter is not to scale.
- Quarter Section of CDF
in Collider Run I, 1992-1996: CDF as configured during
Collider Run I shown as one-quarter of an elevation view. A plan
view would look the same since the detector is nearly symmetric
when rotated about the Tevatron beam line. Note the interaction
point is in the lower left corner.