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Results from Pilot Run for MEG II Positron Timing Counter

  • M. Nakao
  • A. De Bari
  • M. Biasotti
  • G. Boca
  • P. W. Cattaneo
  • M. Francesconi
  • M. De Gerone
  • L. Galli
  • F. Gatti
  • A. Mtchedilishvili
  • D. Nicoló
  • M. Nishimura
  • W. Ootani
  • S. Ritt
  • M. Rossella
  • M. Simonetta
  • Y. Uchiyama
  • M. Usami
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 213)

Abstract

The MEG II experiment at Paul Scherrer Institut in Switzerland will search for the lepton flavour violating muon decay, \(\mu ^+\rightarrow e^+\gamma \), with a sensitivity of \(4\times 10^{-14}\) improving the existing limit of an order of magnitude. In 2016, we finished the construction of the MEG II Timing Counter, the subdetector dedicated to the measurement of the positron emission time. The first one-fourth of it was installed in the experimental area and we performed a pilot run with the MEG II beam of \(7\times 10^{7}\mu ^+/\)s. The timing resolution reached the design value improving by a factor of two compared to MEG.

Keywords

Scintillation counter Timing resolution Silicon photomultiplier (SiPM) Muon physics 

References

  1. 1.
    Baldini, A.M., et al., (MEG Collaboration): Search for the lepton flavour violating decay \(\mu ^+\rightarrow \rm e^+\gamma \) with the full dataset of the MEG experiment. Eur. Phys. J. C 76, 434 (2016)Google Scholar
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    Ritt, S.: The DRS chip: cheap waveform digitizing in the GHz range. Nucl. Instr. Meth. A 518, 470–471 (2004)ADSCrossRefGoogle Scholar
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    Bardelli, L., Poggi, G., Bini, M., et al.: Time measurements by means of digital sampling techniques: a study case of 100 ps FWHM time resolution with a 100MSample/s, 12 bit digitizer. Nucl. Instr. Meth. A 521, 480–492 (2004)ADSCrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd.  2018

Authors and Affiliations

  • M. Nakao
    • 1
  • A. De Bari
    • 2
    • 3
  • M. Biasotti
    • 4
    • 5
  • G. Boca
    • 2
    • 3
  • P. W. Cattaneo
    • 2
  • M. Francesconi
    • 6
    • 7
  • M. De Gerone
    • 4
    • 5
  • L. Galli
    • 6
  • F. Gatti
    • 4
    • 5
  • A. Mtchedilishvili
    • 8
  • D. Nicoló
    • 6
    • 7
  • M. Nishimura
    • 1
  • W. Ootani
    • 9
  • S. Ritt
    • 8
  • M. Rossella
    • 2
  • M. Simonetta
    • 2
    • 3
  • Y. Uchiyama
    • 9
  • M. Usami
    • 1
  1. 1.Department of PhysicsThe University of TokyoTokyoJapan
  2. 2.INFN Sezione di PaviaPaviaItaly
  3. 3.Dipartimento di FisicaUniversitá degli Studi di PaviaPaviaItaly
  4. 4.INFN Sezione di GenovaGenovaItaly
  5. 5.Dipartimento di FisicaUniversitá degli Studi di GenovaGenovaItaly
  6. 6.INFN Sezione di PisaPisaItaly
  7. 7.Dipartimento di FisicaUniversitá degli Studi di PisaPisaItaly
  8. 8.Paul Scherrer Institut PSIVilligenSwitzerland
  9. 9.ICEPPThe University of TokyoTokyoJapan

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