The Hellenic Society for the Study of High Energy Physics (HeSSHEP) continuously participates in international research projects. Some major examples to mention are the ALICE and ATLAS experiments applied at CERN.
NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS (NKUA)
The main goal of the ALICE Collaboration is to study the physics of strongly interacting matter at the highest energy densities reached so far in the laboratory. In such condition, an extreme phase of matter – called the quark-gluon plasma – is formed. Our universe is thought to have been in such a primordial state for the first few millionths of a second after the Big Bang. The properties of such a phase are key issues for Quantum Chromodynamics, the understanding of confinement-deconfinement and chiral phase transitions. In contrast to the expectations that the QGP would have properties similar to an almost ideal, weakly coupled gas of quarks and gluons, experimental results from Relativistic Heavy Ion Collider (RHIC) have shown that a hot, strongly interacting, nearly perfect and almost opaque liquid was produced in central Au–Au collisions at the top RHIC energy. The first collisions of lead nuclei, delivered by the CERN Large Hadron Collider (LHC) at the end of 2010, at a centre-of-mass energy per nucleon pair = 2.76 TeV, marked the beginning of a new era in ultra-relativistic heavy-ion physics.
University of West Attica (UNIWA)
The ATLAS group of the Electronics and Computer Technologies Laboratory (ECTLab), Department of Electrical and Electronics Engineering, UNIWA, is involved in the design and development of the test bench for the configuration and testing of the Level-1 Data Driver Cards (L1DDC) designed for the ATLAS Muon Spectrometer upgrades (New Small Wheel Micromegas and sTGC detectors.
The L1DDCs will serve as intermediate boards that will accept Level-1 electrical bit streams coming from up to 8 front end electronics transmit them optically to the off-detector network interface system and distribute trigger time and configuration data to the front ends. The ECTLab’s test bench will test a large number of L1DDCs at the production phase along with Athens-NTUA, Athens-NKUA, Aegean University and Athens-NCSR test stations.