Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target

The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 1011 muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07) × 1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill

Track reconstruction and matching between emulsion and silicon pixel detectors for the SHiP-charm experiment

In July 2018 an optimization run for the proposed charm cross section measurement for SHiP was performed at the CERN SPS. A heavy, moving target instrumented with nuclear emulsion films followed by a silicon pixel tracker was installed in front of the Goliath magnet at the H4 proton beam-line. Behind the magnet, scintillating-fibre, drift-tube and RPC detectors were placed. The purpose of this run was to validate the measurement's feasibility, to develop the required analysis tools and fine-tune the detector layout. In this paper, we present the track reconstruction in the pixel tracker and the track matching with the moving emulsion detector. The pixel detector performed as expected and it is shown that, after proper alignment, a vertex matching rate of 87% is achieved

Piero Manzoni : Achromes: linea infinita

Catalogo della mostra tenuta a Londra nel 2016

Solo : Piero Manzoni

Solo : Piero Manzoni / ideazione e direzione artistica: Sergio Risaliti ; mostra e catalogo a cura di Gaspare Luigi Marcon

Small molecules | Microbial secondary metabolites

More than 20. 000 bioactive, so-called microbial secondary metabolites are known today. In nature, they can play many different roles, such as antibiotics, toxins, ionophores, bioregulators, and in intra- and interspecific signaling. Their most versatile producers are differentiating filamentous fungi and actinomycetes, followed by other bacteria, such as Bacillus, Pseudomonas, myxobacteria, and cyanobacteria. From a biotechnological point of view, bioactive metabolites have been mainly studied as potential anti-infectives (antibacterials, antifungals, antivirals, and antiparasitics). Many of them, originally discovered for their antibiotic activity, were developed further to become leading anticancer drugs, immunosuppressive agents for organ transplantation, successful pharmaceuticals targeting metabolic and cardiovascular diseases, or products to be used in agriculture and animal husbandry. Due to the diversity and complexity of their structures and biosynthetic pathways, fermentation on industrial scale remains the preferred method for their production. The development of large-scale production processes, first for penicillin, and then for a large variety of antibacterials and other bioactive molecules, has stimulated the development of the fermentation industry and contributed to the evolution of modern biotechnology, including the application of recombinant DNA techniques for improving the performances of the producing strains