336 research outputs found
Performance Of A Liquid Argon Time Projection Chamber Exposed To The WANF Neutrino Beam
We present the results of the first exposure of a Liquid Argon TPC to a
multi-GeV neutrino beam. The data have been collected with a 50 liters
ICARUS-like chamber located between the CHORUS and NOMAD experiments at the
CERN West Area Neutrino Facility (WANF). We discuss both the instrumental
performance of the detector and its capability to identify and reconstruct low
multiplicity neutrino interactions.Comment: 14 pages, 12 figures. Submitted for publication to Physical Review
Implications of CHOOZ results for the decoupling of solar and atmospheric neutrino oscillations
We have considered the results of solar and atmospheric neutrino oscillation
experiments in the scheme of mixing of three neutrinos with a mass hierarchy.
It is shown that the recent results of the CHOOZ experiment imply that
|U_{e3}|^2<<1 (U is the neutrino mixing matrix), that the oscillations of solar
neutrinos are described by the two-generation formalism and that the
oscillations of solar and atmospheric neutrinos decouple. It is also shown that
if not only |U_{e3}|^2<<1 but also |U_{e3}|<<1, then the oscillations of
atmospheric neutrinos do not depend on matter effects and are described by the
two-generation formalism. In this case, with an appropriate identification of
the mixing parameters, the two-generation analyses of solar and atmospheric
neutrino data provide direct information on the mixing parameters of three
neutrinos. We discuss the possibility to get information on |U_{e3}|^2 in
long-baseline neutrino oscillation experiments.Comment: 12 pages, no figure
The Yale Lar TPC
In this paper we give a concise description of a liquid argon time projection
chamber (LAr TPC) developed at Yale, and present results from its first
calibration run with cosmic rays.Comment: 4 pages, 3 figures, NuInt07 Conference Proceeding
Measurement of Through-Going Particle Momentum By Means Of Multiple Scattering With The ICARUS T600 TPC
The ICARUS collaboration has demonstrated, following the operation of a 600
ton (T600) detector at shallow depth, that the technique based on liquid Argon
TPCs is now mature. The study of rare events, not contemplated in the Standard
Model, can greatly benefit from the use of this kind of detectors. In
particular, a deeper understanding of atmospheric neutrino properties will be
obtained thanks to the unprecedented quality of the data ICARUS provides.
However if we concentrate on the T600 performance, most of the
charged current sample will be partially contained, due to the reduced
dimensions of the detector. In this article, we address the problem of how well
we can determine the kinematics of events having partially contained tracks.
The analysis of a large sample of atmospheric muons collected during the T600
test run demonstrate that, in case the recorded track is at least one meter
long, the muon momentum can be reconstructed by an algorithm that measures the
Multiple Coulomb Scattering along the particle's path. Moreover, we show that
momentum resolution can be improved by a factor two using an algorithm based on
the Kalman Filtering technique
Conceptual design of a scalable multi-kton superconducting magnetized liquid Argon TPC
We discuss the possibility of new generation neutrino and astroparticle
physics experiments exploiting a superconducting magnetized liquid Argon Time
Projection Chamber (LAr TPC). The possibility to complement the features of the
LAr TPC with those provided by a magnetic field has been considered in the past
and has been shown to open new physics opportunities, in particular in the
context of a neutrino factory. The experimental operation of a magnetized 10 lt
LAr TPC prototype has been recently demonstrated. From basic proof of
principle, the main challenge to be addressed is the possibility to magnetize a
very large volume of Argon, corresponding to 10 kton or more, for future
neutrino physics applications. In this paper we present one such conceptual
design.Comment: 4 pages, 1 figure, invited talk at 7th International Workshop on
Neutrino Factories and Superbeams (NUFACT05), LNF, Frascati (Rome
First operation of a liquid Argon TPC embedded in a magnetic field
We have operated for the first time a liquid Argon TPC immersed in a magnetic
field up to 0.55 T. We show that the imaging properties of the detector are not
affected by the presence of the magnetic field. The magnetic bending of the
ionizing particle allows to discriminate their charge and estimate their
momentum. These figures were up to now not accessible in the non-magnetized
liquid Argon TPC.Comment: 9 pages, 3 figure
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