Tag Archives: Evento scientifico

Overview ICFDT is an interdisciplinary conference, jointly organized by INFN and ENEA Frascati laboratories, aimed at bringing together scientists, engineers and also experts from industries. Contributions are welcome from the frontiers of diagnostics in different areas of research: high energy and accelerator physics and technology, nuclear fusion plasmas, space and astrophysics research, medical applications, lasers physics and technology, etc., to discuss common interests in concepts and realization of measurement systems. Special focus of this 5th ICFDT edition will be on proposals/projects/ideas for novel measurement systems with a high degree of reliability and innovation to mark significant progress in the diagnostic techniques for Advanced Accelerators, Innovative Nuclear Fusion Devices, Metamaterials and the Detection of Fast and Ultra-fast Events. The ICFDT5 will have seven special and regular plenary sessions, a satellite meeting and a poster session (see Scientific Programme). Poster dim. 841 x 1.189 mm (A0) vertical. Important dates: 15 July 2018    Talk Acceptance Notification 31 July 2018    Early Registration Deadline 10 Sept. 2018  Poster Abstract Submission Deadline 14 Sept. 2018  Late Registration Deadline 3-5 Oct. 2018  Conference Convened

Almost one hundred years ago the Russian biologist A. Gurwitsch found that a weak ultra-violet radiation comes out from the living tissues and influences the mitotic activity of the neighboring organisms. He called this radiation “mitogenetic radiation”. However, this interesting result has been forgotten by the scientific community and the mitogenetic radiation was then considered as an artifact. With the improvement of the methods to detect weak level of radiation and the increase of understanding of quantum optics, there has been a renewed interest in this phenomenon with the works of Colli and Facchini in the 50s and F.A. Popp in the 80s. At the present this research is a new field called “biophotonics”. Biophotons are an endogenous production of ultra-weak photon emission in and from cells and organisms and this emission is characteristic of alive organisms. The essential characteristics of biophoton emission are the following: 1. The total intensity of the emission goes from several to some hundred photons per cm2 surface of the living system. 2. The spectral intensity seems to be quite flat within the range of at least 300 and 800 nm and does not show any defined peaks around some specific frequencies. 3. After excitation by white and/or monochromatic light the emission increases of almost a factor ten and relaxes to the normal values quite slowly following a hyperbolic function rather than an exponential low. 4. The photocount statistics that account for the probability of having n photons within some time interval seems to follow …

I will discuss the reach on Leptoquarks of the future high-luminosity LHC program. In particular, I will present a search strategy in the t-tbar plus missing energy channel. This is one of the most powerful channel to detect third-generation Leptoquarks and offers an important test of models which explain recent flavor anomalies.

We discuss the most important features of a BSM model with extra gauge symmetries, the so called 331 model, which yields the presence of extra gauge bosons, both charged and neutral. We present the relevant phenomenology of doubly-charged gauge bosons, which are a distinctive feature of a version of the 331 model.

    Overview The objective of LODES is to carry out a study and deliver a report on enablers, obstacles, policies and recommendations for the setup of a cross-country federation of standard-based, multi-domain Linked Open Data repositories leveraging as well as addressing the concept of Open Science. The workshop is linked to work that the OECD Global Science Forum is carrying out on Open Data. The participation is free but the registration through the online registration form is required. We invite participants to register by the deadline of August 25th. We also suggest to take care of the hotel accommodation as soon as possible (see the Accommodation page for more information). The workshop will be held in the Bruno Touschek Auditorium (bldg. n. 36) of the Laboratori Nazionali di Frascati (LNF) of INFN. See LNF Map. This page has  URL http://agenda.infn.it/event/lodes2018 For an immediate view of the agenda go to https://agenda.infn.it/conferenceOtherViews.py?confId=15716&view=standard

Intense femtosecond laser pulses, spanning a large range of photon energies from the X-ray to the THz regime, allow for controlled excitations (“pump”) and monitoring (“probe”) of the nonequilibrium dynamics of all the relevant microscopic degrees of freedom in solids. The field of ultrafast materials science is currently evolving from measuring time constants – for instance for the decay of hot electrons via phonon emission – towards ultrafast laser engineering of nonthermal phases of matter with novel properties. Notable examples include light-induced superconducting-like behavior [1], ultrafast switching to hidden ordered states [2], or time-reversal symmetry-broken Floquet states in topological insulators [3]. I will discuss recent theoretical progress in understanding these diverse phenomena from microscopic models and nonequilibrium simulations. I will show examples of light-enhanced superconductivity in an electron-phonon system from classical nonlinear phononics [4,5] and laser-controlled order competition between superconductivity and charge-density waves [6]. I will discuss laser engineering of microscopic couplings in graphene [7] based on quantum nonlinear phononics [8,9]. I will also show ab initio time-dependent density functional theory results for laser-engineered Hubbard U in NiO [10], with a recent application to light-induce the elusive magnetic Weyl semimetal in pyrochlore iridates [11]. I will also highlight some recent developments towards cavity quantum electrodynamical environments enhancing electron-phonon coupling in 2D materials [12], and efforts to make nonequilbrium Green’s functions fast for correlated ordered phases (excitonic condensates) using the generalized Kadanoff-Baym ansatz [13].

The talk will present the second aspect of the concept – non-specific accumulation of radionuclides by microorganisms based on similarity of ionic radii of radionuclides and metal ions with macro elements. The first part will include an overview about ion interactions with surface cell structures and of mechanisms of ion transport into microbial cells. In the next part will be presented a principle for classification of elements according to similarity of ionic radii and comprehensive table rearranging the periodic table of elements according to this principle. After that, three groups consisting of macro elements and their metal and radionuclide analogues will be discussed in details to understand and analyze mechanisms of non-specific radionuclide accumulation. The last part of the seminar will discuss ways for application of natural mechanisms of ion sorption and transport to provide efficient radionuclide extraction from waste waters and methods for enhancing bioaccumulation capacity in various environmental conditions. Also, few examples of application of combination of microbial non-specific reduction and non-specific accumulation will be given to demonstrate an efficiency of established theoretical approach.

The talk will tell about the fundamentals of the concept – application of electrochemical approach to multi-component systems that include aqueous medium, radionuclides, organic matter and living organisms. These will include explanation of basic electrochemical notions and terminology, analysis of multi-component systems and characteristics of their element as well as detection of their key electrochemical properties. The result of these considerations will be justification of an idea about non-specific nature of microbial/radionuclide redox interactions, which will provide the scope and background for the further in-depth discussion. The second part of the seminar will be dedicated to presentation of the first tool of the concept – Pourbaix diagrams and their adaptation to analysis of radionuclide behavior in biological environment which will include explanation of limits for biological systems, transformation of stability fields into reaction equation towards metal ions and radionuclides, identification of essential conditions for running redox reaction and use of the pH – Eh coordinates to determine the characteristics of the reaction under various environmental conditions. Finally, few examples will be given to demonstrate the application of the approach to detect conditions for non-specific reduction of radionuclides and radioactive metal isotopes.

R&D activity on Cu photo-cathodes is under development at the SPARC_LAB test facility to fully characterize each stage of the photocathode ‘‘life’’ and to have a complete overview of the photoemission properties in high brightness photo-injectors. The nano (n)-machining process presented here consists in diamond milling, and blowing with dry nitrogen. This procedure reduces the roughness of the cathode surface and prevents surface contamination introduced by other techniques, such as polishing with diamond paste or the machining with oil. Both high roughness and surface contamination cause an increase of intrinsic emittance and consequently a reduction of the overall electron beam brightness. To quantify these effects, we have characterized the photocathode surface in terms of roughness measurement, and morphology and chemical composition analysis by means of Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), and Atomic Force Microscopy (AFM) techniques. The effects of n-machining on the electron beam quality have been also investigated through emittance measurements before and after the surface processing technique. Finally, we present preliminary emittance studies of yttrium thin film on Cu photo-cathodes.

The design of specific fuel targets represents the crucial point of the Inertial Confinement Fusion scheme. In fact during the laser-matter interaction, due to the irradiation in homogeneities both parametric and hydrodynamic instabilities could be generated, leading to target pre-heating and compression inefficiency. In order to avoid these drawbacks it was considered of interest to coat fusion pellet with light foams, which can act as absorbers of the laser radiation, providing a more homogeneous irradiation and enhancing the efficiency of conversion of laser energy into shock wave energy [1,2]. The presentation will concern the results of 2016 experimental campaign, developed at ENEA research center in Frascati (Rome), in which we studied the behavior of a porous material (Polystyrene Foam) interacting with an high energy Nd laser pulse (duration 3 ns, 30J energy, focal spot dimension 100 µm). From streak camera images we estimated the volume involved in absorption and from the measurement of plasma expansion velocity it was possible to roughly estimate the plasma temperature. With semiconductor detectors we were able to get information about the X-ray emission. In particular we observed that porous materials present an X-ray emission higher than the respective solid material, being comparable to the amount emitted by an Aluminum target. Concerning the density profile, the interferometric images highlighted the presence of second harmonic emission, when irradiating solid material and its absence during the irradiation of porous plastic, which can be symptomatic of a plasma characterized by smoother density gradients [3]. References 1. R. De Angelis, …