Entrance to KTeV Hall
The KTeV project deals with the investigation of the neutral kaon.
Experiments in the KTeV project are focusing on the particle interactions that lead to the observed predomiance of matter over antimatter in the universe. The KTeV project is allowing physicits at Fermilab to investigate the origins of CP violation .
The KTeV project will observe four rare kaon (long) decays with branching fractions as small as 10 -11, an improvement of two orders of magnitude over sensitivity.
The KTeV project is broken into two different experiments, Experiment 799 and Experiment 832.
Experiment 799 is the study of the rare, KL or kaon (long) decays. The study will take place in approximately 60 meters of vacuum decay pipe located beneath KTeV Hall.
Experiment 832 is the study of the Re (e'/e) in the neutral KL system. The kaon decay products are detected, identified, and measured through the detector system of this project.
 |
Many people
think the experiment takes place in the building. The
experiment takes place 2 floors below the building. The
blue building houses the main control center for the KTeV
experiment. As you enter the doors, the main control center would be on the right. This is where the physicists stay during the run of the experiment. It allows them to see and monitor the entire experiment. Once the experiment is running, the physicists are not allowed to enter below. Also, found in the blue building are monitors, computers, and data storagers. These instruments allow the physicists to make sure the instruments are running properly throughout the run and to store the data that is collected from the computers. Once the experiment is completed, they will take all the data stored in these computers and start evaluating the data. |
|
|
| The Main Control Center |
All the instruments used in the KTeV project are found underground from the blue building. To get to the instruments, you would have to travel down 2 flights of stairs. Underground, KTeV Hall is approximately 270 meters in length. After traveling through a hole in the shields of the muon filter, located between NM2 and KTeV Hall (also known as NM3), the kaon beam enters KTeV Hall. |
 |
| The Defining Collimator | |
The beams first encounters a defining collimator. This collimator defines the shape and position of the two neutral kaon beams. . The defining collimator can be moved around to position the beam to enter KTeV Hall. It can be tilted and moved into a position the physictics feel is needed once the beams are entering the KTeV Hall. |
|
 |
Then, the beams travel through a final sweeper. It is a magnet and it serves as to sweep away any unwanted muons, electrons or any particles that can interfere with the outcome of the experiment. Notice the color of this magnet is green. |
 |
|
| A Downstream and Upstream View of the Final Sweeper | |
| This
picture below shows where the kaon beams are traveling
from the collimator to the 18 inch decay pipe. Notice,
the kaon beams travel a long distance in this area. This
is where the Experiment 799 starts. The vacuum decay pipes are comprised of steel tubes. In these vacuum decay pipes, 3% of the kaon long (K L) decays, which can be reconstructed by the downstream dector to measure the decay. |
 |
||||
| Downstream View from the Defining Collimator to the Vacuum Tubes | |||||
