Active Protection of an MgB(2) Test Coil.
Active Protection of an MgB(2) Test Coil.
复制标题
MgB(2) 测试线圈的主动保护。
DOI：
10.1109/tasc.2010.2095812
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Iwasa,Yukikazu
中科院分区：
文献类型：
--
作者：
Park,DongKeun;Hahn,Seungyong;Bascuñán,Juan;Iwasa,Yukikazu
This paper presents results of a study, experimental and computational, of a detect-and-activate-the-heater protection technique applied to a magnesium diboride (MgB2) test coil operated in semi-persistent mode. The test coil with a winding ID of 25 cm and wound with ~500-m long reacted MgB2wire was operated at 4.2 K immersed in a bath of liquid helium. In this active technique, upon the initiation of a “hot spot” of a length ~10 cm, induced by a “quench heater,” a “protection heater” (PH) of ~600-cm long planted within the test coil is activated. The normal zone created by the PH is large enough to absorb the test coil's entire initial stored energy and still keeps the peak temperature within the winding below ~260 K.
