CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Reactions with Relativistic Radioactive ions Beams GSI Large Acceptance Dipole R 3 B-Glad Status Bernard Gastineau DSM Irfu, CEA Saclay R3B Technical Board Meeting GSI April 27, 2009

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Magnet design : –Cold Mass new design –Cryostat new design Experimental area Fabrication of the magnet Schedule R3B - Large acceptance dipole magnet

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Last coil configuration – 5.2 tons Large acceptance dipole The six trapezoidal racetrack coils are tilted with respect to the beam direction. There are two main coils and four lateral coils which are connected in series in a butterfly-like shape.

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Aluminium 20 tons 3.1 m (length) x 4.6 m (width) x 2.8 m (height) Large acceptance dipole Cold mass Previous design

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Magnet Cryostat Previous design Large acceptance dipole Overall size : Length4 m Width6 m Height4 m Mass45 t

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Helium tank Linking plate Cooling pipes Cold Mass New design Total weight 22 tons 3.5 m (length) x 4.8 m (width) x 2.5 m (height) Large acceptance dipole

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Helium tank Fixed support Mobile support Cold Mass New design Large acceptance dipole

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Cryostat study Many parts of reinforcements

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Large acceptance dipole Global thickness = 15 mm Magnet Cryostat New design 50 mm 30 mm

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, External vacuum vessel Total strain < 4.5 mm Loads: Cryostat weight Cold mass weight ~ 25 tons Pressure = 0.1 MPa Buckling analysis Large acceptance dipole

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, External vacuum vessel Total strain ~ 1.5 mm Internal vacuum vessel Total strain ~ 1.2 mm max Handling of the whole Magnet Total weight : Cold mass + Cryostat Large acceptance dipole

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, CryostatPrevious designNew designWith satellite Length4 m with exit flange 4.4 m with exit flange Width6 m5.5 m7 m Height4 m3.6 m Mass45 t Large acceptance dipole

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Experimental area (not final) Geb #6a (Betriebsgebäude) Geb #6b (Low-Energy cave) Geb #6 (High-Energy cave) CR/NESR Source GSI-FAIR Janvier 2009

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, To install the magnet in the hall, we need in particular : - Precise location of power lines, control and power cabinets, this should be define now to prepare the order of the power supply. - Precise location of cryogenic lines and feed-box, the same lines could be used for the tests at Saclay. - System of rotation of the magnet on air-pads (~ 50 tons), Bertin company give the advice to install a fixed axis linked to the magnet, coupled with a mirror resin floor. Large acceptance dipole Experimental area

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, R3B-GLAD Control room - Power supply - Magnet Control System Large acceptance dipole This location must be approved permanently - on the right side - Power supply : lines < 50 m - Local MCS < 10 m to the magnet

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Large acceptance dipole Fabrication of the magnet Cold mass (coil winding + coil casings + integration of coils in their casings) : - the thermo-mechanical study is completed at the nominal level of forces - consequences of default values of coil positions have been studied - the cold mass has been ordered in January and is now under construction - The cold mass cooling calculations are underway in 3D, being updated with new parameters. Due to the presence of eddy currents, the time necessary to establish the nominal current (~4000 A) could be longer than expected. Cryostat (Vacuum vessel + thermal screens + satellite + supports) The Cryostat study is under progress, and a PRR review will be organised next month. The interfaces with the hall and the experiments are now defined by some features recently decided : - for ex., the satellite position will be changed and placed on the right side. For this, we have already modify the joints in the cold mass drawings. - The entrance and the exit flanges of the of the vacuum vessel windows are now fixed.

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Schedule Answers to the Cold Mass call for tender are waited this week Large acceptance dipole Station d’essai

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, The R3B-GLAD magnet construction 1) Superconducting cable definition: June ) Reception of the first cable from the manufacture: June ) Complete delivery & test of the cable: April ) Cold mass design study (thermal, magnetic & mechanical): June ) R3B-GLAD set-up interface definition: Quarter 4, ) First coil winding: 2nd quarter ) First integration of the six coils in the cold mass: 1st quarter ) Cold-mass tests in Saclay: 2nd quarter ) Second integration of the complete magnet: end of ) End of full test in Saclay: 3rd quarter ) Installation at GSI/FAIR: end of 2011 Large acceptance dipole

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, As previously decided : - Power lines and power supply. - Cryogenic lines and Feed-box to connect GLAD to FAIR - System of rotation of the magnet on air-pads, and Specific floor - Vacuum pumping system Moreover CEA Irfu is asking for the funding of : - Magnetic measurements, and tests at Saclay, If they are required because of the FAIR delay. Large acceptance dipole R3B Collaboration Funding

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4,

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4,

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4,

CEA DSM Irfu - Bernard GASTINEAU - R3B Technical Board Meeting -April 4, Tests of the delivered SC cable lengths - OK After cold mass complete design, finalisation of cryostat study Engineering design review Call for tender and ordering to the industry of : – the winding & impregnation of the coils, – the coil casing fabrication, – and the integration in the cold boxes Ordering of the cryostat Assembly and local test of the MSS