A5069467598- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Fusion materials and technologies
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Electronic Packaging and Soldering Technologies
- Advanced ceramic materials synthesis
- Epoxy Resin Curing Processes
- Mechanical Behavior of Composites
- Advanced materials and composites
- Superconductivity in MgB2 and Alloys
- Non-Destructive Testing Techniques
- Synthesis and properties of polymers
- Electron and X-Ray Spectroscopy Techniques
- Radiation Detection and Scintillator Technologies
- Metal and Thin Film Mechanics
- Spacecraft and Cryogenic Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Advancements in Photolithography Techniques
- Boron and Carbon Nanomaterials Research
- Surface and Thin Film Phenomena
- Advanced X-ray and CT Imaging
- Hydrocarbon exploration and reservoir analysis
- Nuclear Physics and Applications
- Nuclear materials and radiation effects
European Organization for Nuclear Research
2010-2024
Universitat Jaume I
1999
Abstract The future of particle accelerators is strongly linked to the development high—field magnets. European Organization for Nuclear Research (CERN) currently developing Nb 3 Sn-based magnets high-luminosity upgrade large hadron collider (HL-LHC), fully exploit its potential and surpass intrinsic performance limitations Nb–Ti-based fabrication Sn a challenging process as it requires managing brittle strain sensitive conductor after reaction heat treatment generate superconducting phase....
The LHCb VELO Upgrade I, currently being installed for the 2022 start of LHC Run 3, uses silicon microchannel coolers with internally circulating bi-phase \cotwo thermal control hybrid pixel modules operating in vacuum. This is largest scale application this technology to date. Production was completed July 2019 and assembly into cooling structures September 2021. paper describes R\&D path supporting production motivation design choices. have excellent peformance, low uniform mass, no...
The Super Proton Synchrotron (SPS) is the last stage in injector chain for CERN’s Large Hadron Collider, and it also provides proton ion beams several fixed-target experiments. SPS has been operation since 1976, upgraded over years. For to operate safely, its internal beam dump must be able repeatedly absorb energy of circulating without sustaining damage that would affect function. latest upgrades led requirement with a momentum spectrum from 14 <a:math...
By the end of October 2022, US HL-LHC Accelerator Upgrade Project (AUP) had completed fabrication ten MQXFA magnets and tested eight them. The are low beta quadrupole to be used in Q1 Q3 Inner Triplet elements High Luminosity LHC. This AUP effort is shared by BNL, Fermilab, LBNL, with strand verification tests at NHMFL. An important step QA plan testing a vertical cryostat BNL. acceptance criteria that could BNL were all met first four production (MQXFA03-MQXFA06). Subsequently, two (MQXFA07...
The phase transformations that occur during the reaction heat treatment (HT) of Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn superconductors depend on overall elemental composition strand subelements. In case modern high <i xmlns:xlink="http://www.w3.org/1999/xlink">Jc</i> strands with a relatively low Cu content, liquid phases are present large temperature intervals and can be detrimental for microstructural microchemical...
The High Luminosity Large Hadron Collider (HL-LHC) is a major upgrade to the existing (LHC) at CERN, aimed increasing integrated luminosity of collider by factor ten [1]). A key component HL-LHC are superconducting Nb3Sn quadrupole magnets, known as MQXF, whose purpose focus particle beam [3]). In order ensure proper operation and structural reliability MQXF quadrupoles, it essential qualify welds their cold mass, used He container magnets. This paper describes process qualification involved...
The new generation internal beam dump of the Super Proton Synchrotron (SPS) at CERN will have to dissipate approximately 270 kW thermal power, deposited by primary proton beam. For this purpose, it is essential that cooling system features a very efficient heat evacuation. Diffusion bonding assisted hot isostatic pressing (HIP) was identified as promising method joining circuits and materials dumps core in order maximize transfer efficiency. This paper presents investigation HIP diffusion...
Amperostatic coulometry was applied for the thickness measurement of Sn-Ag hot dip coatings, which comprise an extended Sn-Cu interdiffusion layer. Complementary measurements, notably weight loss, X-ray photoelectron spectroscopy, energy-dispersive fluorescence (XRF), and dynamic secondary ion mass spectroscopy were performed in order to obtain a better interpretation results. Based on experimental results presented this article, three potential changes observed during measurements are...
The CERN Large Hadron Collider is currently being upgraded to operate at a stored beam energy of 680 MJ through the High Luminosity upgrade. LHC performance dependent on functionality collimation systems, essential for safe cleaning and machine protection. A dedicated experiment Radiation Materials facility created under HRMT-23 experimental campaign. This investigates behavior three jaws having novel composite absorbers made copper diamond, molybdenum carbide graphite, carbon fiber carbon,...
Alumina dispersion-strengthened copper, Glidcop, is used widely in high-heat-load ultra-high-vacuum components for synchrotron light sources (absorbers), accelerator (beam intercepting devices), and nuclear power plants. Glidcop has similar thermal electrical properties to oxygen free (OFE) but superior mechanical properties, thus making it a feasible structural material; its yield ultimate tensile strength are equivalent those of mild-carbon steel. The purpose this work been develop brazing...
Some of the bronze-route Nb3Sn wires produced for ITER toroidal field magnets have values Cu residual resistivity ratio (RRR) lower than specification (RRR > 100) when reacted with longest heat treatment cycle (cycle A: high-temperature plateau 200 h at 650 °C). As low RRR value was suspected to be due Cr plating, CERN has carried out extensive investigations on two different Cr-plated in order assess how is influenced by plating. Each type wire three treatments differing duration (from 100...
A new approach to photo detection using pixel Hybrid Photon Detectors (pixel-HPD's) has been adopted for the LHCb-RICH detector. These devices use a hybrid detector inside an evacuated tube providing high-precision, low noise of Cherenkov radiation. The takes advantage modern CMOS technology offering many advantages over more traditional techniques. include extremely high sensitivity, and fast readout. major technological challenge was encapsulation tube. fabrication HPD involves packaging...
The central solenoid (CS) is the backbone of ITER magnet system. It consists six independent coils held together by a vertical precompression structure that must react to tensile loads and provide sufficient preload maintain coil-to-coil contact during all stages plasma operation. Material selection specifications applicable structural components are particularly demanding. These include large forgings manufactured from high-strength austenitic stainless steel (FXM-19) with stringent...
The Beam Dump Facility (BDF) is a planned fixed-target installation in CERN's North Area, set to start operating 2031. A proton beam of 400 GeV/c will be delivered 1 s pulses 4e13 protons every 7.2 s, amounting 4e19 on target (PoT) per year, with an average thermal power deposition 305 kW. experiment requires high-Z and high-density materials involves challenging thermomechanical conditions; hence, water-cooled refractory metal core proposed. To prevent corrosion erosion, the - tungsten...
Particle-producing targets in high-energy research facilities are often made from refractory metals, and they typically require dedicated cooling systems due to the challenging thermomechanical conditions experience. However, direct contact of water with target blocks can induce erosion, corrosion, embrittlement, especially tungsten (W). One approach overcoming this problem is cladding tantalum (Ta). Unfortunately, Ta generates high decay heat when irradiated, raising safety concerns event a...
Large structural forgings of complex shape are required for several components the precompression structure ITER Central Solenoid, consisting a stack six electrically independent modules and featuring total height 18 m diameter over 4 m. The allows vertical tensile loads to be reacted adequate preload maintained, in order insure contact between during plasma operation. Several such as tie plates, lower upper key blocks, machined from open die an unprecedented combination large size. selected...
The ITER Tokamak will include the largest superconducting magnet system ever built, with 50 GJ of stored energy. A series structural elements guarantee its integrity under extreme load and temperature conditions. Key components to support coils are Toroidal Field Gravity Supports (TFGS), which not only must sustain deadweight magnetic (11000 tonnes), but also withstand large electromagnetic forces during operation accelerations induced by possible seismic events. Each 18 TFGS is secured...
The main superconducting dipoles for the LHC are being stored outdoors periods from a few weeks to several years after conditioning with dry nitrogen gas. Such storage before installation in 27 km circumference tunnel may affect not only mechanical and cryogenic functionality of cryodipoles but also their quench field performance. A dedicated task force was established study all aspects long term behavior cryodipoles, particular emphasis on electrical vacuum integrity, training behavior,...