Abstract
We present a new design study of the neutrino Super Beam based on the Superconducting Proton Linac at CERN. This beam is aimed at megaton mass physics, a large water Cherenkov detector, proposed for the Laboratoire Souterrain de Modane in France, with a baseline of 130 km. The aim of this proposed facility is to study CP violation in the neutrino sector. In the study reported here, we have developed the conceptual design of the neutrino beam, especially the target and the magnetic focusing device. Indeed, this beam presents several unprecedented challenges, related to the high primary proton beam power (4 MW), the high repetition rate (50 Hz), and the low kinetic energy of the protons (4.5 GeV). The design is completed by a study of all the main components of the system, starting from the transport system to guide the beam to the target up to the beam dump. This is the first complete study of a neutrino beam based on a pebble-bed target capable of standing the large heat deposition of MW class proton beams.24 MoreReceived 5 December 2012DOI:https://doi.org/10.1103/PhysRevSTAB.17.031001This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.Published by the American Physical Society
Highlights
In the study reported here, we have developed the conceptual design of the neutrino beam, especially the target and the magnetic focusing device
The recent discovery of neutrino oscillations [1] implies that neutrinos have a nonzero mass and that the mass eigenstates are different from the flavor eigenstates
We present a first complete study of a novel target for a neutrino beam, a pebble-bed target composed of small titanium spheres, cooled by a transversal flow of helium
Summary
The recent discovery of neutrino oscillations [1] implies that neutrinos have a nonzero mass and that the mass eigenstates are different from the flavor eigenstates. The first studies of this facility [5,6,7,8] were performed assuming a 2.2 GeV proton beam and a liquid mercury jet target associated with a single conic horn with a pulsed current of 300 kA Later it was proposed [9] to supplement the system with an auxiliary horn (called reflector) enclosing concentrically the first horn and operated at 600 kA in order to focus pions produced at larger angles. We present a first complete study of a novel target for a neutrino beam, a pebble-bed target composed of small titanium spheres, cooled by a transversal flow of helium Such a setup simplifies the engineering complexity of the system avoiding difficult issues such as the containment of the mercury jet in a magnetic field free region, the challenge of a power supply operating at 600 kA, and the constraints related to mechanical stresses on the horn-reflector system induced by the high frequency current pulsing. The beam line, with a total length of 30 m, is composed of two kickers, and one dipole and three quadrupoles on each of the four separate transport lines
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