nuSTORM - Neutrinos from STORed Muons: Letter of Intent to the Fermilab Physics Advisory Committee

Kyberd, P. ; Smith, D.R. ; /Brunel U. ; Coney, L. ; /UC, Riverside ; Pascoli, S. ; /Durham U., IPPP ; Ankenbrandt, C. ; Brice, S.J. ; Bross, A.D. ; Cease, H. ; Kopp, J. ; Mokhov, N. ; Morfin, J. ; /Fermilab /Yerkes Observ. /Glasgow U. /Imperial Coll., London /Valencia U. /Jefferson Lab /Kyoto U. /Northwestern U. /Osaka U.

关键词: ACCURACY;    ADVISORY COMMITTEES;    CROSS SECTIONS;    DECAY;    DESIGN;    ELECTRONS;    FERMILAB;    FOCUSING;    IMPLEMENTATION;    LITHIUM;    MUONS;    NEUTRINO BEAMS;    NEUTRINO OSCILLATION;    NEUTRINOS;    OSCILLATIONS;    PERFORMANCE;    PHYSICS;    PIONS;    PROTONS;    STORAGE RINGS Experiment-HEP;   

DOI  :  10.2172/1043054
RP-ID  :  FERMILAB-PROPOSAL-1028
PID  :  OSTI ID: 1043054
Others  :  Other: arXiv eprint number arXiv:1206.0294
Others  :  TRN: US1203081

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来源: SciTech Connect

【 摘 要 】

The idea of using a muon storage ring to produce a high-energy ({approx_equal} 50 GeV) neutrino beam for experiments was first discussed by Koshkarev in 1974. A detailed description of a muon storage ring for neutrino oscillation experiments was first produced by Neuffer in 1980. In his paper, Neuffer studied muon decay rings with E{sub {mu}} of 8, 4.5 and 1.5 GeV. With his 4.5 GeV ring design, he achieved a figure of merit of {approx_equal} 6 x 10{sup 9} useful neutrinos per 3 x 10{sup 13} protons on target. The facility we describe here ({nu}STORM) is essentially the same facility proposed in 1980 and would utilize a 3-4 GeV/c muon storage ring to study eV-scale oscillation physics and, in addition, could add significantly to our understanding of {nu}{sub e} and {nu}{sub {mu}} cross sections. In particular the facility can: (1) address the large {Delta}m{sup 2} oscillation regime and make a major contribution to the study of sterile neutrinos, (2) make precision {nu}{sub e} and {bar {nu}}{sub e} cross-section measurements, (3) provide a technology ({mu} decay ring) test demonstration and {mu} beam diagnostics test bed, and (4) provide a precisely understood {nu} beam for detector studies. The facility is the simplest implementation of the Neutrino Factory concept. In our case, 60 GeV/c protons are used to produce pions off a conventional solid target. The pions are collected with a focusing device (horn or lithium lens) and are then transported to, and injected into, a storage ring. The pions that decay in the first straight of the ring can yield a muon that is captured in the ring. The circulating muons then subsequently decay into electrons and neutrinos. We are starting with a storage ring design that is optimized for 3.8 GeV/c muon momentum. This momentum was selected to maximize the physics reach for both oscillation and the cross section physics. See Fig. 1 for a schematic of the facility.