A New Method for Measurement of Helium Mass Flow Rate in the Cryogenic System of TORE SUPRA

作     者：欧阳峥嵘 Pascal Reynaud 

作者机构：Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China Centre d'Etude de Cadarache Association EURATOM-CEA sur la fusion Département de Recherches sur la Fusion Contr(o|^)lée 13108 Saint Paul-Lez-Durance France 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2005年第7卷第3期

页      面：2825-2827页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

主　　题：mass flow rate valve measurement helium 

摘      要：The TORE SUPRA Tokamak was built by EURATOM-CEA association. The NbTi conductor of superconducting coils is inserted in a tight enclosure filled with pressurized superfluid helium of 0.125 MPa at 1.8 K. The thick casing is cooled to 4.5 K by 1.8 MPa in 4.5 K supercritical helium circulation. Around this thick casing, a 80 K thermal shield protects the parts at very low temperatures from the thermal radiation, which is cooled by pressurized helium at 80 K and 1.8 MPa. A new measurement method for helium mass flow rate of 80 K shield and 4.5 K casing is described in this paper. The commissioning was done on the two helium loops of the cryoplant: the supercritical 4.5 K thick casing and 80 K shields. The purpose is to improve control of the 4.5 K and 80 K refrigeration loops.