Daniele Cortis

INFN - Istituto Nazionale di Fisica Nucleare | INFN · Laboratori Nazionali del Gran Sasso LNGS

Vertical overloads and imbalances in the composition of a railway vehicle can result in damage to the track and in a non-conformity regarding safety of operation. On the other hand, wheel-rail lateral contact forces are more directly involved in the running safety and deserve a special focus. In this paper, an experimental approach to estimate late...

A high brightness electron Linac is being built in the Compton Gamma Source at the ELI Nuclear Physics facility in Romania. To achieve the design luminosity, a train of 32 bunches, 16 ns spaced, with a nominal charge of 250 pC will collide with the laser beam in two interaction points. Electron beam spot size is measured with optical transition rad...

Considering the safety against derailment, it is essentially that a vehicle respects the force limits imposed by standards. This paper presents an experimental wayside measurement system for the measurement of the wheel-rail lateral contact force. While there are several well-known solutions for the monitoring of the vertical force, the measurement...

CuCrZr alloy plays a fundamental role for the production of critical components because it is characterized by good thermal and electrical conductivity and by high mechanical strength after precipitation hardening treatment. In the framework of a wider research on the mechanical behaviour of additively manufactured CuCrZr alloy, this study focuses...

CuCrZr alloy is used to produce actively cooled components for high heat flux elements of beamlines and for heat sink of plasma facing components in nuclear fusion devices such as ITER and DEMO. It has an excellent thermal conductivity and specific mechanical strength, together with a high electrical conductivity that is giving high push to its use...

Selective laser melting (SLM) is the most widely used laser powder-bed fusion (L-PBF) technology for the additive manufacturing (AM) of parts from metallic powders. The surface quality of the SLM parts is highly dependent on many factors and process parameters. These factors include the powder grain size, the layer thickness, and the building angle...

Thanks to Laser Powder Bed Fusion (L-PBF) technology, SCALMALLOY® was the first aluminum powder material designed for Additive Manufacturing (AM), achieving a fine microstructure with high performance that is comparable to other cast materials. Despite the mechanical properties that can be achieved, there are some inherent factors that can impede c...

CuCrZr alloys achieve high mechanical properties by thermal (e.g., supersaturated temper and aging), mechanical (e.g., ECAP), or thermomechanical treatments (solution annealing, cold working, and aging). This alloy can be considered a functional material, and it can be exploited in different application fields, thanks to a combination of thermal, e...

The most discussed topic in direct search for dark matter is arguably the verification of the DAMA claim. In fact, the observed annual modulation of the signal rate in an array of NaI(Tl) detectors can be interpreted as the awaited signature of dark matter interaction. Several experimental groups are currently engaged in the attempt to verify such...

Additive Manufacturing (AM) techniques give to designer great freedom as the possibility to rethink the classic geometrical shapes of common objects and it is well suitable for experimental physics research, where components production is based on unique prototype with high specialization and characteristics. In this paper, an AM design process of...

In the field of Additive Manufacturing (AM), interest in the production of pure copper parts is growing. The excellent thermal and electrical properties of this material make it irreplaceable in many industrial and scientific applications. Combining these aspects with the advantages provided by AM in terms of design and geometry optimization, the a...

ASTAROTH is a novel R&D project which aims at improving the physics reach of future direct dark matter detection experiments based on NaI(Tl) scintillating crystals. There is a strong need to test the long standing DAMA positive observation of an annual modulation that could be due to Dark Matter (DM), with the same target material and in a model i...

In the field of diagnostics applied to particle accelerators, and more specifically when it comes to linear electron accelerators, OTR screens represent one of the most widespread and used techniques for beam monitoring. These devices must be able to withstand the thermal stress that the several bunches induce by hitting the surface at high frequen...

Nowadays, wayside measurement systems of wheel-rail contact forces have acquired great relevance for the monitoring of rolling stock, especially for freight trains. Thanks to these solutions, infrastructure managers can check and monitor the status of rolling stock and, when necessary, impose corrective actions for the railway companies. On the oth...

The structural analysis and knowledge of the forces acting between the wheel and the rail, can give important information about the safety of the operation and the track maintenance of railways. The complexity of the analysis comes from the variability of the wheel-rail contact point modelled by the use of multi-body simulations. The theoretical c...

Negli ultimi anni i sistemi di monitoraggio delle forze di contatto tra ruota e rotaia, verticali (Q) e trasversali (Y), hanno attratto l’interesse dei diversi soggetti operanti nel settore Ferroviario, Gestori dell’Infrastruttura (GI) ed Imprese Ferroviarie (IF). Tale interesse è legato essenzialmente alla possibilità di monitorare il parco rotabi...