KEK Hiroshi Yamaoka

Task list for Magnet/Iron yokeTask list for Magnet/Iron yoke

Solenoid magnetSolenoid magnet

Iron yokeIron yoke

Experimental hall and other facilitiesExperimental hall and other facilities

May 11, ’05

SolenoidIron Yoke

B=3T

Coil/superconductor design - Optimize coil configuration2 layers coil+ Al support cylinder + Correction coil? → Calculation: Magnetic force on the coil - Superconductor designConductor size, Material(Al?, Cu?) → Calculation: Load line, Quench simulationCoil support systemConfiguration(Rod?, triangle shape?, string?), size? → Calculation: De-centering/shifted force Self-weight, Thermal load Coil supports have to withstand these forces.Cryostat design - Calculate required wall thickness. Calorimeter is supported on the inner vacuum wall.Assembly/Installation - Assembling procedure.- How install the magnet into iron yoke.Cooling schemeThermal designCryogenics systemPower Supply

Task list for MagnetTask list for Magnet

Tesla

Correction coil

R4.

0m

Magnetic field calculation - Optimize iron yoke configuration Field uniformity<2mm +Correction coil Try to loose amount of ironSupport structure for iron yoke (barrel yoke/end yoke) How support the yoke against forces. Fixture, Bolts? Configuration, Size → Calculation: Self-weight, magnetic force, seismic force? The size of support → Minimize as possibleYoke assembling Weight of one layer >1000 tones. → Assembled from several piece of segments due to a limit of crane capacity.Segment configuration with keeping stiffness as complete one structure has to be considered.Construction Make a construction procedure → Easy/quick construction with high assembling accuracy. Adjust way to the beam line/levelMaintenance procedures Design: Easy/quick access mechanism to the inner detector.

Cable

Earthquake

Self-weight

Mag. force

Solenoid

Barrel Yoke

BUniformity

Task list for Iron YokeTask list for Iron Yoke

Tesla

End Yoke

Space for Solenoid/Yoke assembling Estimation of required space for;- Coil winding- Cryogenic system- Yoke assembling. Required crane capacity

Experimental hall and other facilitiesExperimental hall and other facilities