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Stefano PANEBIANCO stefano.panebianco@cea.fr – 06 24 03 73 99

Stefano PANEBIANCO stefano.panebianco@cea.fr – 06 24 03 73 99. Neutron-gamma discrimination in fission reactions (1 or 2 teams) Micromegas detector characterization: from X to cosmic rays Gamma spectrometry for material characterization

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Stefano PANEBIANCO stefano.panebianco@cea.fr – 06 24 03 73 99

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  1. Stefano PANEBIANCOstefano.panebianco@cea.fr – 06 24 03 73 99 • Neutron-gamma discrimination in fission reactions (1 or 2 teams) • Micromegasdetector characterization: from X to cosmic rays • Gamma spectrometry for material characterization • Muon lifetime measurement (organic scintillators or Water tank) • Spectrometry and solar light

  2. Spontaneous fission source: Emission of fission fragments, gammas and neutrons Neutron-gamma discrimination γ • Aim of the game: discriminate neutrons from gammas • Two complementary techniques: • Time Of Flight (TOF) • Pulse Shape Discrimination (PSD) • Tools of the game: scintillators + PMT • Inorganic: NaI(Tl); BaF2 • Plastics: NE213 • Organic liquid doped with Gd/Hf γ • Data acquisition and analysis • DAQ card: MATACQ (signal sampling) • Analysis: ROOT code Supervisors: Stefano Panebianco, Vincent Andrieux

  3. Micromegas detector caracterization : from X rays to cosmic rays Micromegas : gas detector invented in 1996 for particle physics • Goals: • Physics of gas detectors • Measure of homogeneity and efficiency of a micromegas prototype for the CLAS12 (JLab) experimentwith a « cosmicbench » CLAS12 Micromegas prototypes electronics and acquisition system, « cosmic bench » Supervisors: David Attié, Francesca Belloni, Mariam Kebbiri

  4. Gamma spectrometry for material characterization Physics : γ-matter interaction (photoelectric peak, Compton effect…) Radioactive source Analysis of Excitation energy spectra Goals: Characterization of a germanium detector Calibration Estimation of efficiency Background noise reduction Use of NIM electronics “Modern” acquisition system Supervisors: Magdalena Kielinska, Jean-François Lemaître

  5. Muon lifetime measurement: organic scintillators Supervisors:Philippe Schune, Julie Malclès, Emmanuel Moulin, Maxime Pequignot

  6. Muon lifetime measurement: Water tank Supervisors:Philippe Schune, Julie Malclès, Emmanuel Moulin, Maxime Pequignot

  7. Main topics : Optical system CCD camera, signal, noise, signal-to-noise ratio Spectrometry, gratings, spectral resolution, light scattering Information processing, data reduction, spectral analysis, calibration Equipment : High resolutiongratingspectrometer Large array CCD detector Acquisition computer Equatorial mount Laboratorydevices : spectral lamps, filters,… The main goal is to produce a calibrated spectrum of the Sun in the visible (400 nm to 800 nm) and to analyse it (temperature, spectral class, abundances…) Spectrometry and Solar light Supervisors:, Pascal Gallais, Samuel Ronayette

  8. Stefano PANEBIANCOstefano.panebianco@cea.fr – 06 24 03 73 99 • Neutron-gamma discrimination in fission reactions (1 or 2 teams) • Micromegasdetector characterization: from X to cosmic rays • Gamma spectrometry for material characterization • Muon lifetime measurement (organic scintillators or Water tank) • Spectrometry and solar light A car may be convenient even though not required. Buses are available from “Le Guichet” RER station

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