Design and construction of the CDF central outer tracker Page: 1 of 3
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t Fermilab FERMILAB-Conf-00/128-E CDF November 2000
Design and Construction of the CDF
Central Outer Tracker
Kevin Burkett
Harvard University
For the CDF Collaboration
Abstract
A new tracking chamber, the Central Outer Tracker (COT), has been built as part
of the upgrade of the CDF detector at the Fermilab Tevatron. The COT is a cylin-
drical open-cell drift chamber, segmented into 96 layers. High voltage and readout
electronics are mounted on the chamber endplates, providing timing and charge
deposition information. The COT is designed to operate in the high luminosity en-
vironment of the upgraded Tevatron. With the addition of the Main Injector and
the Recycler Ring, the Tevatron will be capable of provinding luminosity as high
as 2 x 1032 cm-2 s-1 at a bunch spacing of 132 ns. We discuss the design of the
detector, as well as the assembly. Construction of the COT was completed in Spring
2000, and the first data will be taken during a commissioning run in late Summer
2000.
1 Introduction
As part of the upgrade of the CDF experiment for Run II (1), all of the
tracking detectors are being replaced. The new detector elements and their
readout electronics must be capable of handling the high luminosity and high
repetition rate provided by the Tevatron. At the beginning of Run II, the
bunches will cross at CDF every 396 ns and the luminosity will be as high as
1 x 1032 cm-2s-1. In Run IIb the bunch crossing time will decrease to 132 ns
and the luminosity will be as high as 2 x 1032 cm-2s-1.
The central tracking chamber used in CDF until 1996 was known as the CTC.
The upgraded design, the Central Outer Tracker (COT), is based on the de-
sign of the CTC but improves upon known deficiencies and accomodates the
environment in Run II. The COT is a cylindrical open-cell drift chamber span-
ning from 44 to 132 cm in radii. It operates inside a 1.4 T solenoidal magneticPreprint submitted to Elsevier Preprint
19 May 2000
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Burkett, Kevin. Design and construction of the CDF central outer tracker, article, November 14, 2000; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc717981/m1/1/: accessed April 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.