51 research outputs found

    Sub MeV Particles Detection and Identification in the MUNU detector ((1)ISN, IN2P3/CNRS-UJF, Grenoble, France, (2)Institut de Physique, Neuch\^atel, Switzerland, (3) INFN, Padova Italy, (4) Physik-Institut, Z\"{u}rich, Switzerland)

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    We report on the performance of a 1 m3^{3} TPC filled with CF4_{4} at 3 bar, immersed in liquid scintillator and viewed by photomultipliers. Particle detection, event identification and localization achieved by measuring both the current signal and the scintillation light are presented. Particular features of α\alpha particle detection are also discussed. Finally, the 54{54}Mn photopeak, reconstructed from the Compton scattering and recoil angle is shown.Comment: Latex, 19 pages, 20 figure

    Limits on the neutrino magnetic moment from the MUNU experiment

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    The MUNU experiment was carried out at the Bugey nuclear power reactor. The aim was the study of electron antineutrino-electron elastic scattering at low energy. The recoil electrons were recorded in a gas time projection chamber, immersed in a tank filled with liquid scintillator serving as veto detector, suppressing in particular Compton electrons. The measured electron recoil spectrum is presented. Upper limits on the neutrino magnetic moment were derived and are discussed.Comment: 9 pages, 7 figures Added reference: p.3, 1st col., TEXONO Added sentence: p.4, 1st col., electron attachement Modified sentence: p.5, 1st col., readout sequence Added sentence: p.5, 1st col., fast rise time cu

    Low energy tracking and particles identification in the MUNU Time Projection Chamber at 1 bar. Possible application in low energy solar neutrino spectroscopy

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    In this paper we present the results from the measurements made with the MUNU TPC at 1bar pressure of CF4 in the energy region below 1 MeV. Electron events down to 80 keV are successfully measured. The electron energy and direction are reconstructed for every contained single electron above 200 keV. As test the 137Cs photopeak is reconstructed by measuring both the energy and direction of the Compton electrons in the TPC.Comment: 19 pages, 9 figures (6 figures in color); Figure 10 has been deleted from [v1]. Additional paragraph has been included; Manuscript is submitted to Nuclear Inst. and Methods in Physics Research,

    Neutrino and antineutrino electron scattering

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    Dilepton production by neutrinos at CERN PS

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    A FAST TRIGGER PROCESSOR FOR LIMITED STREAMER TUBES

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    An electronic device has been realized which provides the total number of firing limited streamer tubes (LST) in different sectors as well as in the whole detector. These numbers are available a few microseconds after the read-out of the LST front-end electronics and can be used for trigger purposes

    AN ANALOG MEAN TIMER FOR LONG SCINTILLATION COUNTERS

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    An analog mean-timer has been designed and tested with 3 m long scintillation counters. It provides the mean time of two ECL signals with better than 100 ps precision and can operate at up to 16 MHz
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