Thermal analysis of the cold mass of the 2T solenoid for the PANDA detector at FAIR

[摘要] The superconducting solenoid of the PANDA experiment at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt (Germany) is designed to provide a magnetic field of 2 T over a length of about 4 m in a bore of 1.9 m. To allow a warm target feed pipe oriented transversely to the solenoid axis and penetrating through the cryostat and solenoid cold mass, the magnet is split into 3 inter-connected coils fitted in a common support cylinder. During normal operation, cooling of the cold mass to the working temperature of 4.5 K will be achieved through the circulation by natural convection of two-phase helium in cooling pipes attached to the Al-alloy support cylinder. Pure aluminium strips acting as heat drains and glued to the inner surface of the three coils and thermally bonded to the cooling pipes allow minimizing the temperature gradient across the 6-layers coils. In this paper the thermal design of the cold mass during normal operation and current ramps up and down is validated using an analytical approximation and numerical simulation.

[发布机构] CERN, Geneve 23; CH-1211, Switzerland^1;Joint Institute for Nuclear Research, Dubna, P.O. Box 79, Moscow; 101000, Russia^2;Gesellschaft fur Schwerionenforschung GmbH, Planckstrasse 1, Darmstadt; D-64291, Germany^3

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Analytical approximation;Facility for antiproton and ion research;Normal operations;PANDA detectors;Superconducting solenoids;Thermal designs;Two phase helium;Working temperatures