TESTS OF THE SUPERCONDUCTING MAGNETS DURING MANUFACTURING PROCESS AND OPERATION
Journal Title: Proceedings of Electrotechnical Institute Prace Instytutu Elektrotechniki - Year 2014, Vol 61, Issue 265
Abstract
Superconducting magnets produce high magnetic field with low energy losses. They are used in state-of-the-art devices such as the LHC accelerator, MRI tomography, magnetic separators or SMES devices. The superconducting magnets are designed with low margin due to high costs of the superconductor used. The superconducting magnet requires a special design due to the large forces acting on its coil and bobbin. It also requires special materials to work in low temperatures. A minor movement of the winding, which is as a result of forces during operation, causes a release of heat and may lead to a quench. Failure of the superconducting magnet leads to long and costly repairs, so it is essential to test superconducting magnets during their manufacture process and operation. This paper discusses the main issues concerning the construction of superconducting magnets, their cooling as well as testing. The author presents the tests setup and measurements equipment for SC magnet testing, and testing methods and procedures for LTS superconducting magnets. He presents protection systems of superconducting magnets and testing methods of the protection systems, and also investigates methods to locate faults and defects in supe-conducting magnets, testing and monitoring of the installed superconducting magnets. The tests of a superconducting HTS magnet made of high-temperature superconductors were performed. The HTS magnets are still in the development stage at this time, and their technology requires intensive research.The development of a method for testing HTS superconducting magnets, together with software written in LabView environment to control devices on the test stand and for data acquisition and signals analysis, enabled the performance of tests in accordance with the elaborated method and determination of parameters of superconducting magnets, as well as the area of its stable operation over a wide range of cryogenic temperatures.The results represent a contribution to the measurement techniques at cryogenic temperatures and to the issue of the protection and stability of the superconducting coils, necessary in the design of superconducting magnets.<br/><br/>
Authors and Affiliations
Janusz Kozak
Keywords
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