A5078287635- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Gyrotron and Vacuum Electronics Research
- Particle physics theoretical and experimental studies
- Advanced Measurement and Metrology Techniques
- Electric Motor Design and Analysis
- Astronomical Observations and Instrumentation
- Muon and positron interactions and applications
- Magnetic Properties of Alloys
- Advancements in Photolithography Techniques
- Distributed and Parallel Computing Systems
- Physics of Superconductivity and Magnetism
- Scientific Measurement and Uncertainty Evaluation
- High-Energy Particle Collisions Research
- Laser Material Processing Techniques
- Magnetic Properties and Applications
- Radioactive contamination and transfer
- Advanced MEMS and NEMS Technologies
- Molten salt chemistry and electrochemical processes
- Laser and Thermal Forming Techniques
- Electrical Fault Detection and Protection
- Laser Design and Applications
- Geodetic Measurements and Engineering Structures
European Organization for Nuclear Research
2011-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2002
This contribution describes the experimental program already undergoing and to be completed on High Luminosity LHC (HL-LHC) IT String, an important intermediate milestone of HL-LHC project at CERN. First, it magnet circuits String. Afterwards, different systems installed perform are detailed. The proposed tests defined for validation cryogenic system, full remote alignment powering protection schemes all magnets working in unison. strategy will allow a verification integrated system before...
A strong candidate for the Standard Model Scalar boson, H(126), has been discovered by Large Hadron Collider (LHC) experiments. In order to study this fundamental particle with unprecedented precision, and perform precision tests of closure Model, we investigate possibilities offered An e+e- storage ring collider. We use a design inspired B-factories, taking into account performance achieved at LEP2, imposing synchrotron radiation power limit 100 MW. At most relevant centre-of-mass energy...
Two novel designs have been generated for permanent magnet-based quadrupoles the Compact Linear Collider (CLIC) drive beam. The advantages of reduced heat load in accelerator tunnel and very low operating costs over conventional electromagnets are significant to project, hence motivation developing these designs. beam lattice requirements can be met using two magnet higher strength design, which reaches 60 T/m, has successfully prototyped, this paper will report on measured mechanical...
Big science and ambitious industrial projects continually push technical requirements forward beyond the grasp of conventional engineering techniques. An example these are extremely tight micrometric assembly alignment tolerances required in field celestial telescopes, particle accelerators, aerospace industry. Achieving such extreme for large assemblies is limited, largely by capability metrology used, namely, its uncertainty relation to tolerance required. The current work described here...
The Large Hadron Collider (LHC) contains eight main dipole circuits, each of them with 154 magnets powered in series. These 15-m-long are wound from Nb–Ti superconducting Rutherford cables, and have active quench detection triggering heaters to quickly force the transition coil normal conducting state case a quench, hence reduce hot spot temperature. During reception tests 2002–2007, all these been trained up at least 12 kA, corresponding beam energy 7.1 TeV. After installation accelerator,...
In 2015, the 1232 Nb-Ti dipole magnets in Large Hadron Collider (LHC) have been commissioned to 7.8 T operational field, with 172 quenches. More than 80% of these quenches occurred one three cold mass assemblers (3000 series), confirming what was already observed 2008. this paper, recent analysis carried out on quench performance is reported, including individual reception tests and 2008 2015 commissioning campaigns, better understand above-mentioned anomaly give an outlook for future...
Several state-of-the-art metrology measurement methods have been investigated and combined for a fiducialization of accelerator components in the micrometric regime. The PACMAN project at CERN applied stretched-wire to Compact Linear Collider quadrupole cavity beam position monitor prototypes, locate their magnetic, respectively, electromagnetic, axis using dedicated test stand determine wire with respect external alignment targets (fiducials) testing different methods, such as coordinate...
Micrometric assembly and alignment requirements for future particle accelerators, especially large assemblies, create the need accurate uncertainty budgeting of measurements. Measurements uncertainties have to be accurately stated traceable, international standards, metre-long sized in range tens µm. Indeed, these hundreds assemblies will produced measured by several suppliers around world, integrated into a single machine. As part PACMAN project at CERN, we proposed studied practical...
The beam alignment requirements for the next generation of lepton colliders have become increasingly challenging. As an example, three major collider components CLIC linear are as follows. Before first circulates, Beam Position Monitors (BPM), Accelerating Structures (AS)and quadrupoles will to be aligned up 10 μm w.r.t. a straight line over 200 m long segments, along 20 km linacs. PACMAN is study on Particle Accelerator Components' Metrology and Alignment Nanometre scale. It Innovative...
The series production of the LHC main dipole magnets was completed in November 2006. This paper presents organization implemented at CERN and milestones fixed to fulfill technical requirements respect master schedule machine installation. for follow-up, quality assurance magnet testing, as well three contractors will be described. A description design work procurement most specific heavy tooling key components given with emphasis on advantages drawbacks.
A novel type of highly tunable permanent magnet (PM) based quadrupole has been designed by the ZEPTO collaboration. prototype design (ZEPTO-Q1), intended to match specification for CLIC Drive Beam Decelerator, was built and magnetically measured at Daresbury Laboratory CERN. The utilises two pairs PMs which move in opposite directions along a single vertical axis produce gradient variable between 15 60 T/m. meets CLIC's challenging terms strength tunability magnet.
A tunable hybrid quadrupole magnet design has been proposed for the final focus in Compact Linear Collider (CLIC) that is currently under study. The a combination of an iron dominated electromagnetic with bore diameter 8.25 mm permanent blocks placed between poles made soft magnetic CoFe alloy “Permendur”. possibility using Sm <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Co xmlns:xlink="http://www.w3.org/1999/xlink">17</sub> and Nd Fe...
The objectives of the PACMAN* project are to improve precision and accuracy alignment accelerator components. Two steps concerned: fiducialisation, i.e. determination reference axis components w.r.t targets, initial on a common support assembly. main considered for study quadrupoles, 15 GHz BPM RF structures from Compact LInear Collider (CLIC) project. Different methods have been developed determine these with micrometric accuracy, as well position this in coordinate frame tools validated...
A critical magnet family for the future Compact Linear Collider (CLIC) is Main Beam Quadrupole (MBQ) one. These magnets, placed along two main linacs, will be actively stabilized in nanometre range and are one of key elements reaching outstanding nanometric dimensions luminosity colliding beams. In framework CLIC R&D prototypes procurement Test Facility under construction at CERN, several MBQ were procured. The has a classical electro-magnetic design. challenging aspect design extremely high...
This paper reports about the program of six LHC superconducting main dipole final prototypes and steps towards series manufacture. The above program, launched in summer 1998, relies on collared coils manufactured by industry cold masses assembled at CERN Magnet Assembly Facility. Following design, stability robustness studies, magnet design for manufacture features a "6-block" coil austenitic steel collars. A general description with its components is given working parameters most important...
The large hadron collider (LHC) at CERN has been operating and generating physics experimental data since September 2008, following its first long shut down, it entered a second, 4-year-long run. It is to date the largest superconducting installation ever built, counting over 9000 magnets along 27-km circumference. A significant operational experience accumulated, including occurrence consequences of electrical faults level magnets, as well their protection instrumentation circuits. purpose...
Within the LHC cryo-dipole program, six full-scale superconducting prototypes of final design were built in collaboration between Industry and CERN, followed by launching manufacture pre-series magnets. Five first magnets tested at CERN. This paper reviews main features performance cryo-dipoles 4.2 K 1.8 K. The results quench training, conductor performance, magnet protection, sensitivity to ramp rate field characteristics are presented discussed terms parameters.
The LHC ring will contain 1232 main dipole and 382 quadrupole double aperture magnets. All magnets are superconducting employ Nb-Ti/Cu Rutherford type cables operated at 1.9 K. production has reached the equivalent of almost three octants cold masses nearly four collared coils. 75 over 150 bare ramping up large scale magnet posed several challenges which be discussed, like: coil size uniformity, pre-stress control, mass welding technique geometrical shape issues. magnetic measurement results...
The normal and superconducting magnets for the LHC ring have been carefully examined to insure that each of about 1900 assemblies is suitable operation in accelerator. Hardware experts accelerator physicists contributed this work consisted magnet acceptance, sorting according geometry, field quality quench level. This paper gives a description approval mechanism has running since four years, reporting concise summary main results achieved.