The European share of the ITER magnet superconductors includes the supply of around 20 km of Toroidal Field and 7 km of Poloidal Field conductors. This represents 20% and 11% of the total conductor ...amounts respectively needed for all ITER Toroidal Field (TF) and Poloidal Field (PF) coils. For TF conductor, around 97 tons of superconducting niobium tin strand and 60 tons of copper wire are needed to be purchased, cabled and inserted within a stainless steel jacket tube to form the Cable-In-Conduit-Conductor (CICC). For PF conductor, about 45 tons of superconducting multifilamentary niobium titanium wire need to be cabled and jacketed. Altogether, Fusion for Energy (F4E) placed 4 supply contracts for the European TF and PF coil conductors (one for copper strand, two for niobium tin strand and a single contract for cabling and jacketing). In addition, the PF conductor procurement is based on a bi-lateral agreement with the Russian Federation Domestic Agency (RF DA) where NbTi cables are supplied by RF DA and their jacketing is provided by F4E. In this article, the procurement strategy and the current procurement status are reported for the European contribution of TF and PF conductors.
Status of the F4E Procurement of the EU ITER TF Coils Barbero Soto, E.; Bellesia, B.; Bonito Oliva, Alessandro ...
IEEE transactions on applied superconductivity,
06/2012, Letnik:
22, Številka:
3
Journal Article, Conference Proceeding
Recenzirano
The ITER magnetic system includes 18 Toroidal Field (TF) Coils using Nb3Sn cable-in-conduit superconductor. Each TF coil, about 300-t in weight, is made by a Winding Pack (WP) composed by 7 Double ...Pancakes (DP) modules stacked together, impregnated and inserted in stainless steel coil case. Each DP is made by a Radial Plate (RP), a very large D-shaped stainless steel plate with grooves machined on a spiral path on both sides, in which the insulated conductor is inserted after the heat treatment. The procurement of the TF coils will be carried out by Fusion for Energy (the European Domestic Agency (DA)), responsible for 10 coils (including 1 spare coil) and the Japanese DA, responsible for 9 coils. The conductors will be produced by 6 different DAs, while the coil cases only by the Japanese DA. In July 2008 the Procurement Arrangement was signed between the ITER Organization (IO) and F4E defining the scope, technical and management requirements for the procurement of such coils. F4E has developed a procurement strategy aimed to minimize costs and risks, consisting of subdividing the procurement into three main procurement packages, each foreseeing an initial R&D qualification phase. One procurement package is related to the construction of 72 RP (including 2 prototypes), another to the fabrication of the 10 WP and a third to the cold test and coil-case insertion of 10 WP. So far F4E has signed 5 contracts. In 2009, we placed 2 contracts for the procurement of RP prototypes and 1 contract for the development and qualification of the welding and the Ultrasonic Test technologies for the coil case welding. In 2010 1 contract has been placed for the construction of 10 WP and 1 contract for the engineering optimization of the cold test and coil insertion.
Progress in the F4E Procurement of the EU ITER TF Coils Bonito Oliva, A.; Barbero Soto, E.; Batista, R. ...
IEEE transactions on applied superconductivity,
06/2014, Letnik:
24, Številka:
3
Journal Article, Conference Proceeding
Recenzirano
The ITER magnetic system includes 18 Toroidal Field (TF) Coils constructed using Nb 3 Sn cable-in-conduit superconductor. Each TF coil comprises a Winding Pack (WP) composed of 7 Double Pancake (DP) ...modules stacked together, impregnated and inserted into a stainless steel coil case. Fusion for Energy the European Domestic Agency (DA) is responsible for the procurement of the ten while the Japanese DA is responsible for remaining nine coils. The conductors are being produced by 6 different DAs, while the coil cases only by the Japanese DA. F4E has implemented a procurement strategy aimed to minimize costs and risks, consisting of subdividing the procurement into three main procurement packages, each foreseeing first an R&D and qualification phase. One procurement package is related to the construction of 72 radial plates (RP), another to the fabrication of the ten WP, and a third to the cold test and coil-case insertion of ten WP. In collaboration with industry, F4E has successfully produced two RP prototypes. Regarding the DP, the construction of the first DP prototype has started. In this paper, we will report on the results achieved so far and the status of each of the procurement packages.
In this paper, we will report on the manufacturing of 6 helium inlet mock-ups for the EU ITER TF coils, and on the results of the mock-up tests and other qualification activities carried out in the ...European industry on this subject.
Magnetic shielding studies of the LHCb rich photon detectors Patel, M.; Losasso, M.; Gys, T.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2005, Letnik:
553, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The LHCb experiment will use two RICH detectors to provide particle identification. The Hybrid Photon Detectors (HPDs) adopted for these detectors are required to operate in the fringe field of the 4
...Tm LHCb dipole magnet. In fields in excess of 15
G, photoelectrons are lost from the active area of an HPD. Shielding the HPDs from the fringe field is therefore essential for the efficient operation of the RICH detectors. This paper describes the technique used to calculate the residual field inside the relevant magnetic shields. The size of the problem, together with the disparity in the geometric scales involved, makes the calculations intractable using a finite element model of the entire magnetic environment. As a result, a sub-modelling method has been used. The model indicates that the photon detectors will operate efficiently.
Progress on the ITER TF Coil Winding Pack in EU Soto, E. B.; Batista, R.; Bellesia, B. ...
IEEE transactions on applied superconductivity,
06/2012, Letnik:
22, Številka:
3
Journal Article, Conference Proceeding
Recenzirano
A principal part of the ITER fusion reactor is the Toroidal Field magnet system which consists of 18 "D" shaped coils. Fusion for Energy, (F4E), the European Domestic Agency for ITER, is responsible ...for the procurement of 10 such coils. The completed coils, measuring approximately 14 m × 9 m and weighing 300 tons, comprise an outer structural case into which a "winding pack", itself made up of 7 conductor double pancake and radial plate assemblies, is inserted. The winding packs will be the largest ever built using Nb 3 Sn conductor and their manufacture, using a wind, react and transfer process, presents significant technological challenges. In particular, the conductor double pancakes must be wound with high accuracy and their change in dimension during heat treatment correctly predicted in order to facilitate the transfer to their associated radial plates. These processes require novel and sophisticated tooling to be constructed on a large scale. The contract for the manufacture of 10 ITER TF Coil Winding pack was awarded in July 2010 by F4E to a consortium of three main partners-Iberdrola IC, ASG Superconductors and Elytt Energy and in this paper we present the progress made to date. Particular reference is made to the design and procurement of major items of tooling, including the winding line, heat treatment furnace and transfer tool, and the steps taken to minimize risk by design are described.
In the United States, 20% to 30% of the employed population does shift work. Neonatal nurse practitioners are a part of this group. Yet, there are no guidelines in place regarding shift length. ...Fatigue among shift workers is well documented and carries risks to both patients and health care providers. It is crucial to analyze this problem so that the neonatal nurse practitioner profession can move forward with establishing guidelines for practice; so safe, quality care to patients is assured and the health as well as the role satisfaction of the neonatal nurse practitioner is optimized.
This paper describes a dedicated device to map the magnetic field of the T2K near detector (ND280) magnet, which runs at a nominal field value of 0.2 T, with an accuracy of the order of a Gauss. A ...high accuracy mapping is a key ingredient in order to provide the required momentum accuracy in the ND280 time projection chambers (TPCs) allowing T2K to measure precisely the PMNS matrix parameters Delta m super(2) sub(23) and theta sub(23) This paper describes the design and realization of the device as well as its performance during operation. The reported results show that the aimed at goals are reached.
The ISOLDE Scientific Infrastructure at CERN offers a unique range of post-accelerated radioactive beams. The scientific program can be improved with the “Isolde Superconducting Recoil Separator” ...(ISRS), an innovative spectrometer able to deliver unprecedented (A, Z) resolution. In this paper we present an overview of the physics and ongoing technical developments.
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