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Oct. 29, ’04 KEK H. Yamaoka. Cryostat design. Model-1. 2000tons. Load condition Weight of the calorimeter: 2000tons Weight of the solenoid : ~ 140tons Vacuum : 0.1MPa. Fixed. Fixed. Model-2. Thickness of ・ Inner vacuum vessel ・ End plates
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Oct. 29, ’04 KEK H. Yamaoka Cryostat design Model-1 2000tons Load condition Weight of the calorimeter: 2000tons Weight of the solenoid : ~140tons Vacuum : 0.1MPa Fixed Fixed Model-2 Thickness of ・Inner vacuum vessel ・End plates were optimized. SUS304 sallow=140MPa • Outer vac. vessel • 40mm Fixed Fixed p: Buckling pressure 0.1MPa x 2(safety factor) 2000tons
2000tons Fixed Fixed 2000tons x0.3G Fixed Fixed 2000tons Fixed Fixed Model-1 Model-2 t=40mm t=40mm t=60mm t=60mm t=100mm t=100mm 274MPa>140MPa 118MPa<140MPa Material: SUS304 9mm 15mm Stiffness: D 125MPa E: Young’s modulus I: Moment of Inertia 9mm
R4400 t=50mm 4930(Half) R4000 t30mm, 2 layers 5250(Half) R3720 Demands to calorimeter structure; - Calorimeter is divided to several pieces in the axial direction. - One piece of calorimeter is stiff enough. Detail design is not yet done.