The superconducting fragment separator (Super-FRS) of facility for antiproton and ion research (FAIR) located in Darmstadt, Germany, requires three branched superferric dipoles which are more complex than the 21 standard dipoles already designed by Commissariat l'Energie Atomique et aux nergies alternatives (CEA). The 50-ton branched dipoles allow the beam of particles to be directed towards the different branches of the separator. The final design proposed by CEA Paris-Saclay for these dipoles integrates features required for the installation of the Y-shaped vacuum chamber which have an impact on the magnetic and mechanical design of the magnet. The coil casing design was modified and the cold-to-warm supports had to be reorganized to contain the Laplace forces acting on the weakened mechanical structure. Cryogenic experiments have been conducted to characterize the behavior of the active thermosiphon concept and to validate the cryogenic design proposed last year. We present in this paper the final design for the FAIR Super-FRS branched dipole magnets along with the design simulation results (magnetic, cryogenic, and mechanical analyses) and the main results of the active thermosiphon tests conducted recently.

In the context of the HL-LHC project, a NbTi double aperture quadrupole magnet called MQYY is being developed. This 90-mm-aperture quadrupole magnet has a magnetic length of 3.67 m and an operating gradient of 120 T/m at 1.9 K. Its development is done along two parallel paths: 1) the design, fabrication, and test of a short model; 2) the design and fabrication of two full-scale prototypes in industry within the H2020 EU Pre-Commercial Procurement project QUACO implemented by CERN, CEA, CIEMAT, and NCBJ. We report here on the short-model design choices the status of its fabrication and the preparation of the tests. In particular, we describe the magnetic and mechanical design relying on self-supporting collars, the protection aspects, the fabrication, and the cold test preparation. Finally, we present the unusual scheme of the QUACO project leading to the prototypes fabrication.

CEA has the responsibility of the design studies for the superferric 1.6Tdipole magnets of the Superconducting FRagment Separator (Super-FRS) which is part of the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany. After completing the study for the 21 superferric Super-FRS standard dipole magnets, CEA is currently analysing conceptual solutions for the three superferric branched dipole magnets. Branched dipole magnets are necessary to allow the separated particles to be directed along each of the three branches of the separator. The branched dipoles will keep most of the features incorporated in the standard dipole magnet design but they will have increased complexity to make them compatible with the vacuum chamber layout at the branches locations (Y-shape). The magnetic design of the yoke will be slightly modified whereas a new cryogenic design is required. This paper presents the design concepts envisioned for the FAIR Super-FRS branched dipole magnets and focuses on preliminary electromagnetic and electro-mechanical simulation results. Concepts for the mechanical and cryogenic designs are also described.

The CMS electromagnetic calorimeter (ECAL) barrel consists of 36 supermodules containing a total of 61,200 lead tungstate crystals. For the ECAL barrel integration it is necessary to develop a dedicated tool to insert the 36 supermodules into the Hadron calorimeter (HCAL) barrel via the rails that are fixed on the inner bore of the HCAL. The requirements on the insertion-tooling design are stringent the supermodules are fragile so all the operations, including the rotations to the right phi-positions, should be smooth; the tooling should have fine-adjustment facilities to avoid any kind of distortion on the supermodules. The CEA Saclay is responsible for the design and manufacturing of the CMS ECAL insertion tooling. The successful insertions of the first two supermodules carried out at the CMS experiment site in April 2006 showed that all the design requirements are fulfilled. (c) 2006 Elsevier B.V. All rights reserved.