Superconducting dipole magnet for Superconducting dipole magnet for CBM.CBM.

The status of the SCThe status of the SC dipole magnet for dipole magnet for project CBM.project CBM.

E.A. Matyushevskiy, P.G. Akishin, A.V. Alfeev, V.S. E.A. Matyushevskiy, P.G. Akishin, A.V. Alfeev, V.S. Alfeev, Alfeev,

V.V. Borisov, V.V. Ivanov, E.I. Litvinenko, A.I. V.V. Borisov, V.V. Ivanov, E.I. Litvinenko, A.I. Malakhov.Malakhov.

Authors present the engineering project of superconducting Authors present the engineering project of superconducting dipole magnet for dipole magnet for СБМ СБМ experiment. Parameters of the magnet experiment. Parameters of the magnet corresponds to last requirements of project CBMcorresponds to last requirements of project CBM to magnetic to magnetic

system on formation of the working aperture and sizes of a field system on formation of the working aperture and sizes of a field in a gap of the magnet and the minimal the field in area RICH.in a gap of the magnet and the minimal the field in area RICH.

Tarulinna, Sortavala, Karelia Tarulinna, Sortavala, Karelia 02.06.2009 y.02.06.2009 y.

SC dipole magnet with the aperture 1.3x1.6 m in a SC dipole magnet with the aperture 1.3x1.6 m in a gap of the magnet and length along a beam equal gap of the magnet and length along a beam equal 1 m is shown.1 m is shown.

Geometrical parameters of the SC dipole magnet.Geometrical parameters of the SC dipole magnet.(The energy reserved in a magnet at a working current makes 3.4 (The energy reserved in a magnet at a working current makes 3.4

MJ)MJ)

The is a cryostatThe is a cryostat system of a winding of the dipole system of a winding of the dipole magnet with the coils executed from a magnet with the coils executed from a superconducting cable.superconducting cable.

The is a block from external and internal screens The is a block from external and internal screens with elements of installation and fastening to an with elements of installation and fastening to an yoke of the magnet.yoke of the magnet.

The scheme of calculation under codes The scheme of calculation under codes ANSYS, TOSCA and RADIA ANSYS, TOSCA and RADIA

is shown.is shown.

Distribution lBl inside a gap of the magnet on distance Distribution lBl inside a gap of the magnet on distance from a target up to 1.6 m along a beam and from a target up to 1.6 m along a beam and

distribution of the field along the beam on distance distribution of the field along the beam on distance from 1.6 m up to 4.0 m from a target is shown.from 1.6 m up to 4.0 m from a target is shown.

/code ANSYS/ /code TOSCA//code ANSYS/ /code TOSCA/

Distribution of the field in a gap of the magnet Distribution of the field in a gap of the magnet and integral of the field on distance from -1.0 m and integral of the field on distance from -1.0 m

up to 5.0 m from a target along a beam is shown. up to 5.0 m from a target along a beam is shown. /code TOSCA/ /code TOSCA/

Distribution of the field in cross-section of the magnet inside Distribution of the field in cross-section of the magnet inside of a gap of the magnet and in an yokeof a gap of the magnet and in an yoke of the magnet is of the magnet is

shown. /code RADIA/shown. /code RADIA/

Distributions of the field in cross-section of the magnet inside Distributions of the field in cross-section of the magnet inside of a gap of the magnet (a left picture) and in yokeof a gap of the magnet (a left picture) and in yoke of the of the magnet (a right picture) are shown. /code RADIA/magnet (a right picture) are shown. /code RADIA/

Distributions of a field in longitudinal section inside of the gap Distributions of a field in longitudinal section inside of the gap of the magnet (a left picture) and in the yokeof the magnet (a left picture) and in the yoke of the magnet of the magnet

(a right picture) are shown. /code RADIA/(a right picture) are shown. /code RADIA/

Distribution |Bxy| of a field inside of volume (area of Distribution |Bxy| of a field inside of volume (area of photo detectors of the RICH) and distribution in the photo detectors of the RICH) and distribution in the

form of equipotent surfaces of theform of equipotent surfaces of the field are field are shown. /code ANSYS/shown. /code ANSYS/

The picture of distribution of the field in a plane Х-Y The picture of distribution of the field in a plane Х-Y on distance of 1.6 m from a target (beginning of on distance of 1.6 m from a target (beginning of area of photo detectors of the RICH) is shown. area of photo detectors of the RICH) is shown. /code ANSYS//code ANSYS/

Distribution of componentsDistribution of components BxBx,, ByBy andand Bz Bz of the fieldof the field along the along the bottom edge of the plane X-Y depending on length for area of bottom edge of the plane X-Y depending on length for area of

photo detectors RICH is shown. The height changes from 1.0 m photo detectors RICH is shown. The height changes from 1.0 m up to 1.5 m and on distance of 1.6 m from a target. up to 1.5 m and on distance of 1.6 m from a target.

/code RADIA//code RADIA/

Pictures of distribution of a field in a plane Х-Y Pictures of distribution of a field in a plane Х-Y with coordinates with coordinates X X (0, 1.6); Y (0.5 m, 1.5) on (0, 1.6); Y (0.5 m, 1.5) on distance of 1.6 m and 1.7 m from a target distance of 1.6 m and 1.7 m from a target accordingly (area of photo detectors) are accordingly (area of photo detectors) are

shown. /code TOSCA/shown. /code TOSCA/

Distributions of a field in a plane Х-Y with coordinates Distributions of a field in a plane Х-Y with coordinates X X (0, 1.6); Y (0.5 m, 1.5) on distance of 1.6 m and 1.7 m from (0, 1.6); Y (0.5 m, 1.5) on distance of 1.6 m and 1.7 m from

a target accordingly (area of photo detectors) are shown. a target accordingly (area of photo detectors) are shown. /code RADIA/./code RADIA/.

Pictures of distribution of a field in a plane Х-Y with Pictures of distribution of a field in a plane Х-Y with coordinates coordinates X X (0, 1.6); Y (0.5 m, 1.5) on distance of 1.8 (0, 1.6); Y (0.5 m, 1.5) on distance of 1.8 m and 1.9 m from a target accordingly (area of photo m and 1.9 m from a target accordingly (area of photo

detectors) are shown. /code TOSCA/detectors) are shown. /code TOSCA/

Distributions of the field in a plane Х with coordinates Distributions of the field in a plane Х with coordinates X X (0, (0, 1.6); Y (0.5 m, 1.5) on distance of 1.8 m and 1.9 m from a 1.6); Y (0.5 m, 1.5) on distance of 1.8 m and 1.9 m from a target accordingly (area of photo detectors) are shown. target accordingly (area of photo detectors) are shown.

/code RADIA//code RADIA/

Distributions of a field at area of photo detectors Distributions of a field at area of photo detectors RICH of dependence of size of a current inside coils RICH of dependence of size of a current inside coils of excitation of windings of a magnet are resulted. of excitation of windings of a magnet are resulted. /code RADIA/ /code RADIA/

Distributions of a field at area of photo detectors RICH of Distributions of a field at area of photo detectors RICH of dependence of size of a current inside coils of excitation of dependence of size of a current inside coils of excitation of

windings of a magnet are resulted. /code RADIA/windings of a magnet are resulted. /code RADIA/