Vacuum Tests of a very large Component: The Final Test Cryostat System for the ITER Central Solenoid Modules

摘要

The ITER Central Solenoid system is composed of 6 individual Central Solenoid Modules (CSMs) that are assembled together at the ITER site to form a 18 m high superconducting magnet. General Atomics (GA) is currently under contract to fabricate and test the ITER Central Solenoid Modules (CSMs). The contract is managed by the US ITER at Oak Ridge National Laboratory, under the sponsorship of the Department of Energy Office of Science. The Final Test Cryostat System (FTCS) is used in conjunction with other subsystems to perform final testing of the CSMs before shipping. In particular, final testing includes testing under vacuum conditions including leak testing at ambient and cryogenic temperatures and electrical tests under vacuum and cryogenic conditions. In order to satisfy the different boundary conditions and requirements of the test program, the FTCS components need to conform not only to the usual requirements but must also be suitable for an environment in which high magnetic fields occur. The major steps in design and fabrication of the FTCS are described and results of the test during commissioning are provided.