Welcome to the High-Energy Multi-Messenger group!

 

Our group is conducting experimental research activities in high-energy astroparticle physics. Our main research projects include the data analysis of high-energy neutrino events with the IceCube neutrino telescope, and the contribution to the the next generation ground-based VHE gamma-ray instruments, namely the Cherenkov Telescope Array Observatory (CTAO) and Large High-Altitude Air-Shower Observatory (LHAASO). Specifically, we are involved in the construction and commissioning of the Large Size Telescope (LST), including simulations and first data analysis. The first telescope, LST-1, is about to be ready to be provided to CTAO! We also work on the CalibPipe of the DPPS software of the CTAO.

Our group created the SST-1M project for the realisation of a single-mirror small-size Cherenkov telescope. This has been considered as possible implementation of the SSTs at the Southern site in Chile but was not ultimately selected. Two telescopes have been built and are installed at the Ondroyev science for dedicated observations of blazars and other > 1 TeV sources  in the sky. The SST-1M is a mini-array that can offer a platform for tests of new technologies.

The camera of the SST-1M has been built by the UNIGE group, proving excellent performance with a quite innovative fully digital phylosophy. It employs SiPMs, directly designed by our group. The same technology used for the SST-1M project for the photo-detection plane has also been adopted for the LHAASO Cherenkov/Fluorescence Telescopes (WFCTA). Since then we are members of LHAASO.

We are also responsible of the photosensing plane of a satellite-based experiment called NUSES. We work on the payload TERZINA that will measure UHECR events beyond 100 PeV detecting for the first time Cherenkov light from the limb of the atmosphere. The project is financed by the Italian Ministry as a joint effort with THALES Alenia space Italy. This is a prototype for the future on UHECRs and neutrino skimming from Earth at > PeV energies.

Our group also works on other applications of photosensors, and particularly on SiPMs, e.g. in medical diagnostics. In our laboratory, we are equipped with instruments to test the photosensors and their light guides. Some of us are also involved in research projects concerning the phenomenon of Humbury Brown and Twiss (stellar intensity interpherometry).

We participated to the H2020 project with the SENSE FET-OPEN project, on the development of the ultimate low level sensing sensors, and we were active in gender and diversity issues through the H2020 project GENERA.

Our group offers exciting opportunities for PhD and Bachelor and Master level thesis projects.

 

 

IceCube project

                      

The IceCube Neutrino Observatory is the world largest particle detector buried in the Antarctic ice located at the South Pole at the depth of 1.5-2.5 km. It is especially tailored to search for neutrinos of energy > 100 GeV from the most violent astrophysical sources: events like exploding stars, gamma ray bursts, and cataclysmic phenomena involving black holes and neutron stars.

Our group contributed significantly to one of the most recent breaktrought papers in IceCube: the 10 year data analysis where we found a significant excess from the source NGC1068 and the TXS 0506+056 evidence from blazar flare oh high energy neutrinos also in confidence with gamma-rays. 

The sample we analysed represents a milestone data set of IceCube and is publicly released from this page.

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Cherenkov Telescope Array (CTA) project

 

The Cherenkov Telescope Array (CTA) project will be the world largest observatory composed by Cherenkov telescopes. This new generation of ground-based very-high-energy gamma-ray instruments will improve notably our capabilities of studying the most extreme phenomena in the Universe.

Our group is part of the worldwide community working on this project, and is mainly involved in the construction and first data analysis of the first telescope of the CTA array, the first Large Size Telescope (LST). We lead also two working packages: one on the system engineering and one on the R&D development of a future camera with SiPM.

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