Dr. Hexi SHI

Dr. Hexi SHI (Kaku)
  • March 2023 - Present (Wissenschaftlicher Mitarbeiter)
  • Focus of research:
  • Sensitivity study of geoneutrino and neutrino mass ordering; Geant4 Monte Carlo simulation for the background in JUNO experiment; analysis algorithm development; JUNO detector commissioning.
  • Phone: +49 2461 616334
  • E-mail: h.shi_AT_gsi.de


Past Research topics

  • Precision spectroscopy for exotic atoms, at DAFNE electron-positron collider in Italy and at J-PARC in Japan.
  • Rare event search for Pauli Exclusion Principle violation in VIP-2 experiment at Gran Sasso, Italy.
  • Development of low-noise silicon detectors with sub-electron equivalent noise charge for direct dark matter detection.

Positions and research activities

  • April 2010 - March 2013
    Special Research Fellow of the Japan Society for the Promotion of Science (DC1), The University of Tokyo.
    Worked on precision X-ray spectroscopy of kaonic atoms at DAFNE in Italy.
  • April 2013 - July 2013
    Research fellow, School of Science, University of Tokyo.
  • August 2013 - October 2014
    Post-doc, Stefan-Meyer-Institut, Austrian Academy of Sciences.
    Responsible for the overall preparation of VIP-2 experiment at Gran Sasso, INFN, searching for violation of Pauli Exclusion Principle.
  • November 2014 - October 2016
    INFN Post-doc fellowship for non-Italian citizens, Laboratori Nazionale di Frascati, INFN.
    Continuation of work as the main contributor to the VIP-2 experiment.
  • November 2016 - July 2017
    Service researcher of Stefan-Meyer-Institut, Austrian Academy of Sciences.
    Worked at LNF-INFN, responsible for the overall operation and data analysis of VIP-2 experiment.
  • July 2017 - September 2019
    Post-doc, Institute of High Energy Physics, Austrian Academy of Sciences.
    Worked on the R&D of a new concept on the application of silicon detectors in the direct search of low mass dark matter candidate.
  • March 2020 - February 2022
    Post-doc, Stefan-Meyer-Institut, Austrian Academy of Sciences.
    Worked for kaonic atom X-ray experiments: on data analysis at DAFNE in Italy and on Geant4 MC simulation for J-PARC E57 experiment.


  • Instrumentation for nuclear/particle physics and radiation detection, signal processing, trigger logic implementation(NIM and FPGA),
    and data acquisition system construction.
  • Applications of semiconductor detectors under cryogenic environment, solid scintillator detectors, drift chamber detectors, and readout electronics.
  • Programming in C/C++ for data analysis with CERN ROOT, Monte Carlo simulation with Geant4 tool kit, and data acquisition.
  • In-depth knowledge of multi-dimensional data analysis for nuclear/particle physics experiments.
  • Experienced in building and programming data acquisition system under Unix or Windows using C/C++, NI Labview, Python, and various softwares;
    structure design, managing, and processing experimental data from raw level.
  • Experienced on building high-vacuum system for cryogenic applications(down to 10s of Kelvin).
  • Solid experience in mechanical component design using FreeCAD software.
  • Two years of first-hand experience in application and programming of the ASIC and FPGA modules on PCBs for particle detectors.
  • Experience in electronics PCB designing with CADENCE toolkit, in production and assembly processes with manufacturers.

Selected publications

Selected events

  • Febrary 2024: Talk at 23nd JUNO collaboration meeting, Kaiping, China;
    ''Simulation of the background from ($\alpha$, n) reactions in the JUNO scintillator''.
  • October 2023: Talk at JUNO EU-AM collaboration meeting Fall 2023, Munich, Germany;
    ''Simulation for the background from 13C($\alpha$, n)16O reactions in JUNO''.
  • July 2023: Talk at 22nd JUNO collaboration meeting, Kaiping, China;
    ''Preliminary MC energy spectra of AlphaN background in JUNO''.
  • July 2019: Talk at 15th International Workshop Dark Side of the Universe, Buenos Aires, Argentina;
    on the developement of the DANAE exepriment.
  • July 2018: Talk at 39th International Conference on High Energy Physics ICHEP 2018, Seoul, Republic of Korea;
    on the new experimental search for direct detection of dark matter.
  • June 2018: Invited seminar talk, Laboratori Nazionale di Frascati, INFN, Italy;
    on the new experimental search for direct detection of dark matter in DANAE experiment.
  • April 2018: Talk at 22nd International Workshop on DEPFET Detectors and Applications, Ringberg Castle, Germany,
  • August 2017: Poster presentation at 6th International Conference on Neww Frontiers in Physics ICNFP 2017, Crete, Greece;
    on the experimental search for the Violation of Pauli Principle.
  • September 2016: Talk at International Conference on Kaon Physics, KAON 2016, Birmingham University, UK;
    on high precision spectroscopy experiments of kaonic atoms.
  • September 2015: Talk at 14th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2015, Torino, Italy;
    on the experimental search for the Violation of Pauli Principle in VIP-2 experiment at LNGS.
  • August 2015: Talk at 4th International Conference on New Frontiers in Physics, ICNFP 2015, Crete, Greece;
    on kaonic atom experiments in SIDDHARTA.
  • June 2013: Poster presentation at INPC 2013, Firenze, Italy;
    on kaonic hydrogen X-ray measurement in SIDDHARTA.