Daniele DE GRUTTOLA Curriculum

Author or co-author of 397 published papers on international peer reviewed journals, with 17578 total citations, 44.28 average number of citations per paper, and a h-index of 71 (taken from ISI Web Of Science on 16/01/2021).
Daniele De Gruttola is Associate Professor at Department of Physics at University of Salerno, since 02.03.2020. His research activity is in the field of experimental particle physics, in particular: particle physics at colliders (ALICE), cosmic rays (EEE) and dark matter (DS-20k). He received his master degree in Physics at University of Salerno in 2004, with the thesis “Costruzione e test delle Multigap Resistive Plate Chambers per la rivelazione di radiazione cosmica ad altissima energia”. His activity during the thesis work was devoted to the study of Multigap Resistive Plate Chambers (MRPC), in two experiments, the Extreme Energy Events (EEE) and A Large Ion Collider Experiment (ALICE) at the CERN LHC.
ALICE is a general-purpose, heavy-ion detector which focuses on QCD, with the aim to study the physics of strongly interacting matter and the Quark-Gluon Plasma (QGP) at extreme values of energy density and temperature in nucleus-nucleus collisions. The MRPC are used in ALICE as Time Of Flight (TOF) system to provide crucial measurements to the track distribution (to complete the barrel tracking system) and to the Particle IDentification.
EEE is a project with the aim to build a network of muon telescopes (each composed of three 2x1 m/sup2 MRPCs) installed in INFN and Centro Fermi (CREF) laboratories and Italian High Schools to measure cosmic rays.
De Gruttola received his PhD in Physics at University of Salerno in 2008, with the thesis “Development and construction of a Time Of Flight (TOF) system for charged hadron identification in ALICE at LHC”. During his PhD work De Gruttola was co-responsible of the ALICE TOF group, for the test, assembling and installation of the 18 MRPC “supermodules” composing the TOF system, with the duty to coordinate the hardware activities and the first studies of the performance of the system.
On the 30th of December 2016, De Gruttola got a permanent position at CREF in Rome as Researcher in Physics. He left this position on March 2020, in order to become Associate Professor at Department of Physics at University of Salerno.

ALICE studies heavy-ion collisions at a centre of mass energy up to 5.02 TeV per nucleon pair, to probe deconfined matter in the QGP, where quarks and gluons are free. Extreme conditions in terms of temperature and energy density of QGP are believed to have existed a fraction of the second after Big Bang before the hadronization phase of quark and gluons and may still exist in the nucleus of collapsing startsor other astrophysical objects. The results obatined by ALICE corroborate the understanding of color confinement and chiral symmetry restoration. The mechanism behind the QGP is complex and dependent on the energy of the collision system: ALICE results added important pieces of information to previous experiments performed at CERN and RHIC and the ALICE upgrade, currently ongoing to cope with higher LHC collsion rate and luminosity, will be crucial to deeply understand matter deconfinement.
He spent 12 years at CERN (as postdoc positions in University of Salerno, CREF and INFN-CERN fellowship) with several tasks:

•R&D on MRPC to study different geometries and electronics configurations to be used in ALICE TOF system (2004-2006);
•Beam-tests data taking to complete the TOF R&D phase (2004-2006);
•responsible of the test chain of the front-end cards for the distribution of trigger and LV of TOF, performed in Salerno laboratories (2006-2007);
•MRPC mass production in Bologna laboratories: responsible for quality assurance of production processes, in particular for gaps monitoring during construction (2005-2008);
•assembling, test and commissioning of TOF, including data analysis with comisc rays (2007-2008);
•TOF expert during data taking in pp and Pb-Pb collisions (2008-2011);
•optimization of the code used for physics selection in ALICE, Period ALICE Run Coordinator and study of the trigger for rare events (in particular Ultra Peripheral Collisions - UPC) (2011);
•main data analyser of UPC in Pb-Pb, Xe-Xe and p-Pb collisions to probe gluon shadowing and gluon saturation in the proton: observe photo-production of vector mesons (J/ψ and ψ’) in collisions where two relativistic nuclei collide with impact parameter larger than twice their radius; ions interact via their clouds of virtual photons and give the possibility to study γ+proton and γ+A collisions. UPCs allow to study the electromagnetic processes in the absence of hadronic interactions and they are a powerful tool to probe the gluon distribution function in the nuclei in Pb-Pb and Xe-Xe collisions; UPCs also allow to study the gluon distribution in the proton (and access very low-x region 10-3,10-5) in p-Pb collisions (2011-2014);
•Data Quality Monitor (DQM) System Run Coordinator with the task to coordinate around 200 researchers to setup and mantain the code to monitor data taking for all ALICE sub-detectors (2014 - 2018);
•De Gruttola is currently responsible of the new data taking monitor system (Quality Check - QC) in view of the ALICE upgrade for data taking in LHC RUN 3 (2019 - now).

The muon telescopes of the EEE experiment are based on MRPC. The EEE network is composed, so far, of 56 telescopes, each made of three MRPCs; it is organized in clusters and single telescope stations distributed all over the Italian territory and installed in High Schools, covering an area larger than 3×105 km2. The study of Extensive Air Showers (EAS), that is one of the goal of the project, requires excellent performance in terms of time and spatial resolution, efficiency, tracking capability and long term stability.
De Gruttola is technical coordinator since 2017 and local responsible of 5 telescopes since 2006. Futhermore his activity in EEE includes data analysis (in particular on detector performance) and teaching activity with High Schools students involved in the project. One of his main activity is the construction, test and maintenance of the telescopes during the data taking in coordinated Runs.

Darkside-20k is an experiment for direct search of dark matter. It aims at the detection of WIMPs using a dual phase Liquid Argon Time Projection Chamber (LArTPC) . DarkSide-20k is now in the R&D phase and it will start taking data in 2024 at Laboratori Nazionali del Gran Sasso (LNGS), using a fiducial mass liquid argon of 20 tonnes. In order to detect photons produced in the WIMP-Argon interaction, DS-20k will use the Silicon PhotoMultipliers (SIPMs). This kind of photo-sensors will permit a higher photo-detection efficiency and a lower background, compared to standard PMs (used in the previous experiments, i.e. Darkside 50). The TPC will be outfitted with about 200k SiPMs grouped into 8200 single readout channels, 25 cm2 Photo Detection Module (PDM). Salerno group is member of the Global Argon Dark Matter Collaboration (GADMC) since 2018.
De Gruttola is local INFN responsible for Salerno group, that cooperates with Bologna group for testing SiPM boards that will be used in the experiment. De Gruttola is the outreach reponsible of the experiment.
He is local responsible for the dark matter outreach INFN project, DARK.
Additional information:
•member of Paper Committee for ALICE UPC physics;
•scientific associate at CERN since 2005;
•scientific associate at INFN since 2005;
•member of the organizing and scientific committee of 2° Convegno Nazionale sulla Fisica di ALICE - Vietri (Sa) in 2006;
•supervisor of a CERN Summer Student for the project “Set up and programming of an ALICE Time-Of-Flight trigger facility and software implementation for its Quality Assurance (QA) during LHC Run 2”, proposed by De Gruttola and selected in 2016;
•member of the organizing and scientific committee of the 27th International Conference Quark Matter - Venice in 2018;
•Principal Investigator of a selected MAECI project of cooperation Italy-Korea “Development of MRPC with Ecological Gas (DMEG)”: new MRPC geometry, configuration and gas mixtures are studied in order to replace the C2F4H2-based gas mixture which has very high Global Warming Potential (GWP) value;
•masterclass author Darkside and EEE;
•software skills: c++ (root and aliroot), html, php, MySQL;
•referee activiry for JINST and EPJ C;
•qualified as full professor;
•talk contributions in 20 conferences to report ALICE results (6 invited talks) and 2 conferences to report EEE results (1 invited talk);
•invited talks:
1.J/ψ photoproduction in Pb-Pb and p-Pb ultra-peripheral collisions with ALICE at LHC, 9-11 July 2011 DESY, Hamburg Germany, Physics in Intense Fields;
2.Recent ALICE results and plans, 10-14 February 2013, Cairo (Egypt), Primordial QCD Matter in Early Universe;
3.J/ψ photoproduction in Pb-Pb ultra-peripheral collisions at √sNN = 2.76 TeV with ALICE at LHC, 20-24 May 2013, Paris France, Photon 2013;
4.J/ψ photoproduction in Pb-Pb and p-Pb ultra-peripheral collisions with ALICE at LHC, 8-14 September 2013, Illa da Toxa, Galizia Spain, International Conference on the Initial Stages in High-Energy Nuclear Collisions (IS2013);
5.Physics of Ultra-peripheral collisions with ALICE at LHC, 9-11 April 2014, LNGS Assergi and GSSI L’Aquila, Congresso IFAE;
6.Ultra-peripheral collisions and photoproduction with ALICE at the LHC: results and perspectives, 7-11 September 2015, Palaiseau France, POETIC 6 - Physics Opportunities at Electron-Ion Collider, Ecole Polythecnique;
7.First results from coordinated data taking by the Extreme Energy Events experiment, 14-15 September 2015, Gallipoli, CRIS 2015 - Cosmic Ray International Seminar
•several outreach contributions at CERN, Italian Univerities and other public events.