10 research outputs found
The NuMI Neutrino Beam at Fermilab
The Neutrinos at the Main Injector (NuMI) facility at Fermilab is due to
begin operations in late 2004. NuMI will deliver an intense muon neutrino beam
of variable energy 2-20 GeV directed into the Earth at 58 mrad for short (~1
km) and long (~700-900 km) baseline experiments. Several aspects of the design
are reviewed, as are potential upgrade requirements to the facility in the
event a Proton Driver is built at Fermilab to enhance the neutrino flux.Comment: Paper given at the ICFA Workshop on High Intensity Hadron Beams
(HB2004), Bensheim, Germany, 18-22 October, 200
Accelerator Neutrino Beams
Neutrino beams at from high-energy proton accelerators have been instrumental
discovery tools in particle physics. Neutrino beams are derived from the decays
of charged pi and K mesons, which in turn are created from proton beams
striking thick nuclear targets. The precise selection and manipulation of the
pi/K beam control the energy spectrum and type of neutrino beam. This article
describes the physics of particle production in a target and manipulation of
the particles to derive a neutrino beam, as well as numerous innovations
achieved at past experimental facilities.Comment: submitted to Physics Reports, notes from lectures given at the NuFact
Summer Schoo
Beam Tests of Ionization Chambers for the NuMI Neutrino Beam
We have conducted tests at the Fermilab Booster of ionization chambers to be
used as monitors of the NuMI neutrino beamline. The chambers were exposed to
proton fluxes of up to 10 particles/cm/1.56s. We studied space
charge effects which can reduce signal collection from the chambers at large
charged particle beam intensities.Comment: submitted to IEEE Trans Nucl. Sc
The NuMI Neutrino Beam and Potential for an Off-Axis Experiment
The Neutrinos at the Main Injector (NuMI) facility at Fermilab is under
construction and due to begin operations in late 2004. NuMI will deliver an
intense beam of variable energy 2-20 GeV directed into the Earth at
58 mrad. Several aspects of the design are reviewed, and potential limitations
to the ultimate neutrino flux are described. In addition, potential
measurements of neutrino mixing properties are described.Comment: talk given at NuFact '02, Imperial College London, proceedings to
appear in J. Phys. G, revised to add a referenc
The Long-Baseline Neutrino Experiment: Exploring Fundamental Symmetries of the Universe
The preponderance of matter over antimatter in the early Universe, the
dynamics of the supernova bursts that produced the heavy elements necessary for
life and whether protons eventually decay --- these mysteries at the forefront
of particle physics and astrophysics are key to understanding the early
evolution of our Universe, its current state and its eventual fate. The
Long-Baseline Neutrino Experiment (LBNE) represents an extensively developed
plan for a world-class experiment dedicated to addressing these questions. LBNE
is conceived around three central components: (1) a new, high-intensity
neutrino source generated from a megawatt-class proton accelerator at Fermi
National Accelerator Laboratory, (2) a near neutrino detector just downstream
of the source, and (3) a massive liquid argon time-projection chamber deployed
as a far detector deep underground at the Sanford Underground Research
Facility. This facility, located at the site of the former Homestake Mine in
Lead, South Dakota, is approximately 1,300 km from the neutrino source at
Fermilab -- a distance (baseline) that delivers optimal sensitivity to neutrino
charge-parity symmetry violation and mass ordering effects. This ambitious yet
cost-effective design incorporates scalability and flexibility and can
accommodate a variety of upgrades and contributions. With its exceptional
combination of experimental configuration, technical capabilities, and
potential for transformative discoveries, LBNE promises to be a vital facility
for the field of particle physics worldwide, providing physicists from around
the globe with opportunities to collaborate in a twenty to thirty year program
of exciting science. In this document we provide a comprehensive overview of
LBNE's scientific objectives, its place in the landscape of neutrino physics
worldwide, the technologies it will incorporate and the capabilities it will
possess.Comment: Major update of previous version. This is the reference document for
LBNE science program and current status. Chapters 1, 3, and 9 provide a
comprehensive overview of LBNE's scientific objectives, its place in the
landscape of neutrino physics worldwide, the technologies it will incorporate
and the capabilities it will possess. 288 pages, 116 figure
Long Baseline Neutrino Physics in the U.S
Long baseline neutrino oscillation physics in the U.S. is centered at the Fermi National Accelerator Laboratory (FNAL), in particular at the Neutrinos at the Main Injector (NuMI) beamline commissioned in [2004][2005]. Already, the MINOS experiment has published its first results confirming the disappearance of νµ's across a 735 km baseline. The forthcoming NOνA experiment will search for the transition νµ → νe and use this transition to understand the mass heirarchy of neutrinos. These, as well as other conceptual ideas for future experiments using the NuMI beam, will be discussed. The turn-on of the NuMI facility has been positive, with over 310 kW beam power achieved. Plans for increasing the beam intensity once the Main Injector accelerator is fully-dedicated to the neutrino program will be presented