Dr. Hexi SHI
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Dr. Hexi SHI (Kaku)
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Education
- Doctor of Science
Graduate School of Science, The University of Tokyo
PhD thesis: Precision spectroscopy of kaonic hydrogen atomic X-rays - M.Sc. in Physics
Graduate School of Science, The University of Tokyo
Master thesis: Energy calibration method and performance evaluation of silicon drift detectors for precision spectroscopy of kaonic atom x rays - B.Sc. in Physics
The University of Tokyo
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.
Expertise
- 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
- M. T\"{u}chler, H. Shi et al. (SIDDHARTA Collaboration),
The SIDDHARTA-2 Veto-2 system for X-ray spectroscopy of kaonic atoms at DA$\Phi$NE,
JINST (2023) 18 P11026 - L. Abbene, A. Scordo, H. Shi et al. (SIDDHARTA Collaboration),
New opportunities for kaonic atoms measurements from CdZnTe detectors,
Eur. Phys. J. Spec. Top. (2023) 232:1487-1492 - F. Sgaramella, M. T\"{u}chler, C. Amsler, H. Shi et al. (SIDDHARTA Collaboration),
Measurements of high-n transitions in intermediate mass kaonicatoms by SIDDHARTA-2 at DA$\Phi$NE,
Eur. Phys. J. A (2023) 59:56 - D.L. Sirghi, H. Shi(second author) et al. (SIDDHARTA Collaboration),
New measurements of kaonic helium-4 L-series X-rays yields in gas with the SIDDHARTINO setup,
Nucl. Phys. A (2022) 122567 - T. Hashimoto et al. (J-PARC E62 Collaboration),
Measurements of Strong-Interaction Effects in Kaonic-Helium Isotopes at Sub-eV Precision with X-ray Microcalorimeters,
Phys. Rev. Lett. 128 (2022) 112503 - H. Shi et al. (6 co-authors, DANAE Collaboration),
DANAE - a new experiment for direct dark matter detection with DEPFET silicon detectors,
PoS Proceedings of Science, ICHEP2018(589) - H. Shi et al. (VIP-2 Collaboration),
Experimental search for the violation of Pauli Exclusion Principle,
Eur. Phys. J C(2018) 78:319 - A. Scordo, H. Shi et al. (6 co-authors),
VOXES: a high precision X-ray Spectrometer for diffused sources with HAPG crystals in the 2-20 keV range,
JINST, (2018), 13 C04002 - C. Curceanu, H. Shi(corresponding author) et al. (VIP-2 Collaboration),
Test of the Pauli Exclusion Principle in the VIP-2 underground experiment,
Entropy, 19(2017), 300 - M. Bazzi, H. Shi(corresponding author) et al. (SIDDHARTA Collaboration),
K-series X-ray yield measurement of kaonic hydrogen atoms in a gaseous target,
Nucl. Phys. A 954 (2016) 7-16 - M. Bazzi et al. (SIDDHARTA Collaboration),
A new measurement of kaonic hydrogen X-rays,
Phys. Lett. B 704 (2011) 113-117
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.