Request for a Test Exposure of OPERA Targets in the NuMI Beam Page: 2 of 24
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We request to use the Fermilab NuMI neutrino beam in the MINOS
Near Detector Hall to produce neutrino interactions in two separate
detector arrangements using prototype target bricks designed for the
OPERA experiment. OPERA is scheduled to begin taking data in
the CERN Neutrinos to Gran Sasso (CNGS) beam in 2006.
The proposed test set up would be located just upstream of the
MINOS Near Detector. The data will be used to validate the OPERA
analysis scheme and to study backward particle production in neu-
trino interactions, which is of interest to the OPERA collaboration as
well as the neutrino community in general. In addition, we contend
that the data taken in this exposure may also be useful to the MINOS
collaboration as additional input to the understanding of the initial
composition of the neutrino beam. Ideally, this exposure could begin
in early to mid-2005 and remain in place throughout 2005. We an-
ticipate providing timely feedback to both the OPERA and MINOS
The advantages of using nuclear emulsion as a particle detector are well
known. The high resolution of emulsion has made it a medium of choice for
a number of applications where the required spatial and angular resolution
are paramount and its limitations due to the lack of timing information are
less important. Emulsions are commonly used in cosmic ray detectors and
have found applications in high energy experiments for detecting short lived
particles such as charm, beauty and tau. The addition of electronic detectors
to emulsion experiments solved the problem of the lack of timing information
in the emulsion, but it was the development of automatic scanning machines
that revolutionized the use of these hybrid detectors, making them capable
of performing even in high rate environments. Most recently, the DONUT
experiment (FNAL E-872), used a hybrid emulsion spectrometer to make the
first direct observation of tau neutrino interactions .
The CNGS facility is being constructed to deliver a v, beam from the
CERN SPS to the Gran Sasso Laboratory. Since it is believed that v, -+ v
oscillations explain the observed atmospheric v, deficit, the CNGS beam,
coupled to a detector capable of observing r appearance is an important
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Kodama, K.; U., /Aichi; Tzanakos, G.; U., /Athens; Baller, B.; Lundberg, B. et al. Request for a Test Exposure of OPERA Targets in the NuMI Beam, report, November 1, 2004; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1013457/m1/2/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.