Bobine sottili per elettromagneti, e relativi metodi e dispositivi per produrle

L'invenzione riguarda bobine sottili ottenute avvolgendo un unico filo materiale superconduttore in due strati avvolti contemporaneamente in modo che ogni spira di uno strato sia a contatto almeno di una spira dell'altro strato una sola volta. L'invenzione riguarda inoltre metodi e dispositivi per l'avvolgimento e la finizione di tali bobine. La bobina da formare è fissata su un mandrino basculante. Due carrelli avvolgono la bobina ruotando attorno al mandrino basculante e inseguendosi lungo una guida anulare - fissa rispetto al telaio portante della macchina - mentre una navetta , recante il mandrino, trasla con moto alternato lungo una guida rettilinea sottostante e trasversale alla guida anulare - o seguendo due movimenti rotatori di senso opposto attorno al mandrino basculante fisso rispetto al telai

The mechanism inserting the target cell of the Hermes experiment

Consiglio Nazionale delle Ricerche - Biblioteca Centrale - P.le Aldo Moro, 7 Rome / CNR - Consiglio Nazionale delle RichercheSIGLEITItal

Very light tracking detector for jet target experiment in high energy physics

The detector here described constitutes the inner tracking part of the experiment E760 wich will study charmonium spectroscopy on antiproton accumulator at FNAL . It is composed of a multiwire proportional chamber and radial projection chamber on the same mechanical structure with cylindrical symmetry . Some special features are described to get field shaping , to minimize spare charge effect, multiple scattering and photon conversio

The LHCspin project

The goal of LHCspin is to develop, in the next few years, innovative solutions and cutting-edge technologies to access the field of spin physics by exploring a unique kinematic regime and by exploiting new reaction processes. In fact, a polarized gaseous target, operated in combination with the high-energy, high-intensity LHC beams and the highly performing LHCb particle detector, has the potential to open new physics frontiers and deepen our understanding of the intricacies of the strong interaction in the non-perturbative regime of QCD. This configuration, with center of mass energies up to 115 GeV, using both proton and heavy-ion beams covers a wide backward rapidity region, including the poorly explored high x-Bjorken and high x -Feynman regimes. This ambitious task poses its basis in the recent installation of an unpolarized gas target (SMOG2) in the LHCb spectrometer resulting not only in a unique project itself, but also in an invaluable playground for its polarized upgrade. An overview of the physics potential, a description of the LHCspin experimental setup, and the first output the of SMOG2 system are presented

An automatic winding machine making superconducting coils foe the LHC correction magnets

An automatic winding machine has been designed and some experimental tests have been performed in view of the production of 21600 superconducting coils for the LHC correction magnets. The main purpose of this development is to understand the problems related to the automatic winding process and find out the best solution for the required needs. The requirements in terms of rapid prototyping and system reconfiguration needs have been demanded innovative solution for the electrical and control motion part. This paper describes the machanical configuration of the machine and the motion control system as wel

The SMOG2 project

"A proposal for an upgraded version of the existing gas injection system for the LHCb experiment (SMOG) is presented. The core idea of the project, called SMOG2, is the use of a storage cell for the injected gas to be installed upstream of the VELO detector. The main advantage of the proposed system is to increase by up to two orders of magnitude the effective target areal density, thus resulting in a significant increase of the luminosity for fixed-target collisions. Other important advantages are the possibility to inject additional gas species, including H$_2$ and D$_2$, a better defined interaction region, displaced with respect to the nominal interaction point, and thus possibly compatible with running in parallel to the collider mode (resulting in a further huge increase in luminosity). A technical design of the target system is presented together with a description of the installation procedure. Impedance properties and Electron Cloud effects have been studied for the proposed system, and the possible beam instabilities estimated. The geometry of the system has been integrated into the GEANT4 model of the LHCb detector in order to validate the target design with reliable simulation studies, and to ensure that the near-beam material budget has negligible effects in terms of beam-induced background. The loss in reconstruction efficiency with respect to SMOG for selected physics channels, due to the displaced interaction region with respect to the nominal interaction point, is found to be of the order 10%, thus largely over-compensated by the expected increase in luminosity. The installation of the system is proposed for the LHC Long Shutdown 2. This will open new physics frontiers at LHCb already from the LHC Run-3.

LHC fixed target experiments: Report from the LHC Fixed Target Working Group of the CERN Physics Beyond Colliders Forum

Several fixed-target experiments at the LHC are being proposed and actively studied. Splitting of beam halo from the core by means of a bent crystal combined with a second bent crystal after the target has been suggested in order to study magnetic and electric dipole moments of short-lived particles. A similar scheme without the second crystal or other schemes with more conventional solid or gas target have been proposed to study the hadronic matter and the quark-gluon plasma, as well as to provide inputs to cosmic ray physics. Most notably, an upgrade of the existing and already productive LHCb gas target (SMOG), which would make use of a storage cell, has been proposed, designed, and extensively reviewed. The implementation in LHCb of a polarised gas target, based on the storage cell technique, was also discussed, motivated by the nucleon-spin study. The status of these proposals, their technical feasibility and impacts on the LHC machine have been studied in the LHC fixed-target working group of the Physics Beyond Collider forum at CERN. The status and outcome of these studies are presented here

The new CGEM Inner Tracker and the new TIGER ASIC for the BES III Experiment

A new detector exploiting the technology of Gas Electron Multipliers is under construction to replace the innermost drift chamber of BESIII experiment, since its efficiency is compromised owing the high luminosity of Beijing Electron Positron Collider. The new inner tracker with a cylindrical shape will deploy several new features. The analogue readout and two complementary algorithms to reconstruct the position will allow achieving a spatial resolution of 130 µm in a 1 T magnetic field. For this purpose, TIGER, a new custom 64-channel ASIC, providing time and charge measurements, has been developed. Here, a summary of the most recent results on detector and electronics prototypes is given

NA62 Technical Design

NA62 technical design repor

The beam and detector of the NA62 experiment at CERN

NA62 is a fixed-target experiment at the CERN SPS dedicated to measurements of rare kaon decays. Such measurements, like the branching fraction of the K(+) → π(+) ν bar nu decay, have the potential to bring significant insights into new physics processes when comparison is made with precise theoretical predictions. For this purpose, innovative techniques have been developed, in particular, in the domain of low-mass tracking devices. Detector construction spanned several years from 2009 to 2014. The collaboration started detector commissioning in 2014 and will collect data until the end of 2018. The beam line and detector components are described together with their early performance obtained from 2014 and 2015 data.NA62 is a fixed-target experiment at the CERN SPS dedicated to measurements of rare kaon decays. Such measurements, like the branching fraction of the $K^{+} \rightarrow \pi^{+} \nu \bar\nu$ decay, have the potential to bring significant insights into new physics processes when comparison is made with precise theoretical predictions. For this purpose, innovative techniques have been developed, in particular, in the domain of low-mass tracking devices. Detector construction spanned several years from 2009 to 2014. The collaboration started detector commissioning in 2014 and will collect data until the end of 2018. The beam line and detector components are described together with their early performance obtained from 2014 and 2015 data