CEA DSM Dapnia

DIRAC-Phase-1 Annual Report meeting

Status of theR3B-GLAD Magnet

DIRAC-Phase-1

Annual Report Meeting26 September 2006

Bernard Gastineau

CEA DSM DAPNIA

- Bernard GASTINEAU - R3B-GLAD Magnet - DIRAC-Phase-1 Annual Report meetingCEA DSM Dapnia26 September 2006 2

DIRAC-Phase-1 Annual Report meeting

Superconducting coils

Main coil

Lateral coil

- Bernard GASTINEAU - R3B-GLAD Magnet - DIRAC-Phase-1 Annual Report meetingCEA DSM Dapnia26 September 2006 3

DIRAC-Phase-1 Annual Report meeting

2006 – First Year main points

•Preliminary Interface meeting with GSI-FAIR – 27 March •Magnet Protection study and Instrumentation – March & April•Preliminary Superconducting cable specification – April•Mechanical studies – beginning in February

– Cold mass – behaviour with magnetic forces – Cryostat mechanical studies – behaviour with pressure forces

•Magnetic design optimisation (peakfield)•Superconducting cable specification – May-June

•Technical Design Review 1 (Conductor validation) – 4 July•Check of the Large Acceptance of the present cryostat design – September

•Superconducting cable Order - (October)

- Bernard GASTINEAU - R3B-GLAD Magnet - DIRAC-Phase-1 Annual Report meetingCEA DSM Dapnia26 September 2006 4

DIRAC-Phase-1 Annual Report meeting

Check of the Large Acceptance (September 2006):

In order to get the acceptance of the magnet, we have to respect several geometrical conditions difficult to put together :

-A beam size of +/- 80 mrad horizontally and vertically from the target,

-transparency to Neutrons & to 1 GeV Proton trajectories in a 2.4 T field,

-a free space of 1 meter around the target, for detectors,

-A vacuum connection between the beam pipe and the cryostat,

-Thermal screen and thick inner vacuum vessel to resist to the pressure,

-And thick cold casing around the coils to maintain the magnetic forces.

The geometrical optimisation has given the following new parameters:

-Distance from the Target to the magnetic entrance face = 1.450 m,

-A fixed horizontal angle of beam incidence / magnet axis = 14 degrees,

-vertical and horizontal angles of the main and lateral coils = 5° and 18.6°,

And we have to verify that the fringe field is < 20 mT around the target.

- Bernard GASTINEAU - R3B-GLAD Magnet - DIRAC-Phase-1 Annual Report meetingCEA DSM Dapnia26 September 2006 5

DIRAC-Phase-1 Annual Report meeting

2006/2007 – Next Year Main Tasks

•Magnetic design optimisation - October– Mechanical sensitivity study & Optical resolution optimisation

•Interface Definition meeting with GSI-FAIR - (October) •Cold Mass mechanical studies

– Cold Casing : further coil pre-stress study – 2006 Q4

– Detailed winding & Integration study - 2007 Q1-Q2•Technical Design Review 2 (Industrial specification) - January 2007 •Superconducting cable delivery and test – (March & Q4 2007)•Cold Casing Order - 2007 Q1 & Q2•Winding & Integration 1 Order – 2007 Q3

- Bernard GASTINEAU - R3B-GLAD Magnet - DIRAC-Phase-1 Annual Report meetingCEA DSM Dapnia26 September 2006 6

DIRAC-Phase-1 Annual Report meeting

CEA DSM Dapnia

DIRAC-Phase-1 Annual Report meeting