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Emulsion Chamber with Big Radiation Length for Detecting Neutrino Oscillations | | A.E. Asratyan
; G.V. Davidenko
; A.G. Dolgolenko
; V.S. Kaftanov
; M.A. Kubantsev
; V.S. Verebryusov
; | | Date: |
7 Feb 2000 | | Journal: | Nucl.Instrum.Meth. A450 (2000) 1-11 | | Subject: | hep-ex | | Abstract: | A conceptual scheme of a hybrid-emulsion spectrometer for investigating various channels of neutrino oscillations is proposed. The design emphasizes detection of $ au$ leptons by detached vertices, reliable identification of electrons, and good spectrometry for all charged particles and photons. A distributed target is formed by layers of low-Z material, emulsion-plastic-emulsion sheets, and air gaps in which $ au$ decays are detected. The tracks of charged secondaries, including electrons, are momentum-analyzed by curvature in magnetic field using hits in successive thin layers of emulsion. The $ au$ leptons are efficiently detected in all major decay channels, including xedec. Performance of a model spectrometer, that contains 3 tons of nuclear emulsion and 20 tons of passive material, is estimated for different experimental environments. When irradiated by the $
u_mu$ beam of a proton accelerator over a medium baseline of $ sim 1$ km/GeV, the spectrometer will efficiently detect either the omutau and omue transitions in the mass-difference region of $Delta m^2 sim 1$ eV$^2$, as suggested by the results of LSND. When exposed to the neutrino beam of a muon storage ring over a long baseline of $ sim$ 10-20 km/GeV, the model detector will efficiently probe the entire pattern of neutrino oscillations in the region $Delta m^2 sim 10^{-2}-10^{-3}$ eV$^2$, as suggested by the data on atmospheric neutrinos. | | Source: | arXiv, hep-ex/0002019 | | Services: | Forum | Review | PDF | Favorites | |
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