Switchyard in the Main Injector era conceptual design report Page: 3 of 23
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Switchyard in the Main Injector Era
Conceptual Design Report
C. Brown, T. Kobilarcik, P. Lucas,
A. Malensek, C.T. Murphy and M.-J. Yang
Introduction
This report presents elements of a design of the Switchyard and of the present fixed target
beamlines in the era of the Main Injector (MI). It presumes that 800 GeV Tevatron beam
will be transported to this area in the MI era, and permits it to share cycles with 120 GeV
Main Injector beam if this option is desired. Geographically, the region discussed extends
from the vicinity of AO to downstream points beyond which beam properties will be
determined by the requirements of specific experiments. New neutrino lines not utilizing
the present Switchyard (NuMI, BooNE) are not addressed. Similarly Main Injector beams
upstream of AO are described fully in MI documentation and are unaffected by what is
presented here.
The timing both of the preparation of this report and of its recommendations for proceeding
with construction relate to a desire to do required work in Transfer Hall and Enclosure B
during the Main Injector construction shutdown (September 1997 - September 1998). As
these areas are off-limits during any Tevatron operation, it is necessary for the fixed target
program that work be completed here during this extended down period.
The design presented here enables the operation of all beamlines in the manner specified in
the current Laboratory plans for future fixed-target physics. The current plans are specified
in Table I.
Table I
Anticipated utilizations of fixed-target beamsProton 800 GeV
No 120 GeV
Not necessarily 3-way split
Muon (NM2) 120 GeV and 800 GeV with a changeover period
Neutrino Program moves to new areas being designed
Recycle components
Meson No 800 GeV
120 GeV
Maintain 3-way splitThe period 1998-1999
The assumption for this time frame is that the Main Injector will be feeding the Tevatron for
the continuation of the 800 GeV fixed target run in KTeV and perhaps the Proton area.
Therefore, 800 GeV transport and splitting between Proton and NM2 (the targeting
enclosure for KTeV/KAMI) are maintained. However, even with this task plus perhaps that
of antiproton stacking, the new machine will have the capacity to accelerate still more
protons. We intend to use this capability to commission MI slow extraction and beamAugust 27, 1997
1
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Brown, C.; Kobilarcik, T.; Lucas, P.; Malensek, A.; Murphy, C. T. & Yang, M. J. Switchyard in the Main Injector era conceptual design report, report, August 1, 1997; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc698224/m1/3/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.