Quench protection of the BabyIAXO magnet

Autor:	Nikolay Bykovskiy, Helder Pais Da Silva, Alexey Dudarev, H. Ten Kate
Rok vydání:	2020
Předmět:	History Materials science Busbar business.industry Direct current Electrical engineering Cryocooler Accelerators and Storage Rings Computer Science Applications Education law.invention Conductor Electromagnetic coil law Electrical network Magnet business Voltage
Zdroj:	Journal of Physics: Conference Series. 1559:012127
ISSN:	1742-6596 1742-6588
DOI:	10.1088/1742-6596/1559/1/012127
Popis:	BabyIAXO, a 20 m-long twin-bore helioscope aiming for search of axion like particles, is currently in the engineering design phase and its construction is to be completed within the next 4 years. In addition to X-ray detectors and focusing optics, the system is equipped with a 50 MJ magnet with a common coil layout, containing two 10 m-long NbTi flat racetrack coils cooled by a group of cryocoolers. It has to operate at 10 kA, preferably in persistent mode with disconnected power supply, allowing to simplify the sun-tracking rotation system of BabyIAXO. A direct current mode is possible as well. Hence, quench protection is a high priority. Here, we present the electrical circuit of the BabyIAXO magnet and its protection layout when operated in persistent mode. The quench process is calculated using a 3-D thermo-electrical model of the coil windings, also accounting for the presence of the coil casing and the quench-back effect. Impact of the operating current, conductor properties, voltage detection threshold and location of hot-spot on the peak temperature is discussed. Quench protection aspects of the HTS busbars and persistent mode switch are also addressed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::406d4da7032fbaa85666a83edeb198b1 https://doi.org/10.1088/1742-6596/1559/1/012127 Zobrazit plný text záznamu