131 research outputs found
Design and Assembly of a Large-aperture Nb3Sn Cos-theta Dipole Coil with Stress Management in Dipole Mirror Configuration
The stress-management cos-theta (SMCT) coil is a new concept which has been
proposed and is being developed at Fermilab in the framework of US Magnet
Development Program (US-MDP) for high-field and/or large-aperture accelerator
magnets based on low-temperature and high-temperature superconductors. The SMCT
structure is used to reduce large coil deformations under the Lorentz forces
and, thus, the excessively large strains and stresses in the coil. A
large-aperture Nb3Sn SMCT dipole coil has been developed and fabricated at
Fermilab to demonstrate and test the SMCT concept including coil design,
fabrication technology and performance. The first SMCT coil has been assembled
with 60-mm aperture Nb3Sn coil inside a dipole mirror configuration and will be
tested separately and in series with the insert coil. This paper summarizes the
large-aperture SMCT coil design and parameters and reports the coil fabrication
steps and its assembly in dipole mirror configuration
Guidelines for a common port noise impact assessment: the ANCHOR LIFE project
The paper reports the main contents of the guidelines developed in the framework of the project ANCHOR, acronym of Advanced Noise Control strategies in HarbOuR, which is a European Project funded as part of the announcement Life 2017. The guidelines represent an updated version of those elaborated in the NoMEPorts project named 'Good Practice Guide on Port Area Noise Mapping and Management'; the aim is to define a common approach in port noise monitoring and assessment, considering the outcomes of previous EU funded projects and the algorithms defined by the European Directive 2015/996, in order to produce Port Noise Impact Assessments to be included in ports Environmental Management Systems (EMS). The procedures described in the guidelines will guide professionals in organizing and managing geographical data, in characterizing noise sources and defining, for each of them, the correct noise emission power level, in evaluating noise propagation and people exposure to noise and, finally, in selecting the most efficient mitigation action by means of a cost benefit analysis. Moreover, the paper reports the results of a comparison between noise mapping outcomes obtained using the new noise mapping algorithms defined by the 2015/996 Directive and the old 2002/49/EC Annex II ones; especially at long distances from the source the differences between the two methodologies are not negligible
Accelerator Magnet Development Based on COMB Technology with STAR Wires
This paper reports progress in the development of COMB magnet technology with
STAR wires. A two-layer dipole magnet with 60 mm clear bore has been recently
fabricated and tested in liquid nitrogen. The purpose of the test was to
determine what kind of critical current degradation occurs in the process of
winding the STAR wire into the COMB structure.Comment: CEC/ICMC2
Magnetic Mirror Structure for Testing Shell- type Quadrupole Coils
Abstract-This paper presents magnetic and mechanical designs and analyses of the quadrupole mirror structure to test single shell-type quadrupole coils. Several quadrupole coils made of different Nb 3 Sn strands, cable insulation and pole materials were tested using this structure at 4.5 and 1.9 K. The coils were instrumented with voltage taps, spot heaters, temperature sensors and strain gauges to study their mechanical and thermal properties and quench performance. The results of the quadrupole mirror model assembly and test are reported and discussed
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Development of TQC01, a 90 mm Nb3 Sn Model Quadrupole for LHC Upgrade Based on SS Collar
As a first step toward the development of a large-aperture Nb{sub 3}Sn superconducting quadrupole for the Large Hadron Collider (LHC) luminosity upgrade, two-layer technological quadrupole models (TQS01 at LBNL and TQC01 at Fermilab) are being constructed within the framework of the US LHC Accelerator Research Program (LARP). Both models use the same coil design, but have different coil support structures. This paper describes the TQC01 design, fabrication technology and summarizes its main parameters
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