Tevatron bunch length studies at CDF Page: 1 of 17
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Fermilab
FERMILAB-TM-2172 May 2002
FERMILAB-TM-2172
CDF/DOC/CDF/CDFR/5951
Version 1.0
May 6, 2002
Tevatron Bunch Length Studies at CDF
Matthew Jones
University of Pennsylvania, Philadelphia, PA 19104
Bob Kephart, Rick Vidal
Fermilab, Batavia, IL 60510
1 Introduction
A luminous interaction region can be described by the distribution in (x, y, z) over
which pp interactions are observed in a detector. The spatial size of this distribution
can be written in terms of expressions that involve only combinations of the proton
and anti-proton bunch sizes. Hence, it is not possible to determine the sizes of the
proton and anti-proton bunches independently by fitting the distribution of (x, y, z)
from the recorded events.
If, in addition to the coordinates (x, y, z) at which pp interactions occur, the times
at which the interactions took place are also measured, then it becomes possible to
measure the lengths of the proton and anti-proton bunches separately. This sensitivity
is due to a correlation between z and t that arises from the fact that the proton and
anti-proton bunches travel in opposite directions.1
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Jones, Matthew; Kephart, Bob & Vidal, and Rick. Tevatron bunch length studies at CDF, report, May 29, 2002; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc743182/m1/1/: accessed March 29, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.