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1、华中科技大学硕士学位论文超导直接冷却二元电流引线特性的研究姓名：谢江波申请学位级别：硕士专业：制冷及低温工程指导教师：王惠龄20070114华中科技大学硕士学位论文ABSTRACTInthesuper-conductivemagnetsystem,comparedwiththeuseofliquidsubstance,theconductioncooledtechnologyhasgreatadvantagestocoolthemagnet.Thecurrentleadswhichcombinethepowersupplyandthesuper-conductivemagnetsys
2、temarethemainthermalleakagesource.TakingthetechnologyofHTScurrentleadscaneffectivelyreducethethermalleakagesource.AccordingtotheNationalHigh-techDevelopmentProgram(863),InstituteofCryogenicsofHUSTbeginstostudyanddesigncoolingsystemofSMESbycryocooler.Basedonthisbackground,thecharactersofconducti
3、oncooledHTSCisdiscussedinthepaper.Firstlytheclass、structureandpropertymanufacturingmethodsofHTS,whichrelatingwithdesignofbinarycurrentleads,wouldbeintroduced.TherelationshipofthecoveredsilverlayersandtheHTScurrentleadsarediscussedtoo.Secondly,theconductionmodelofthebinarycurrentleadsisbuilt.the
4、coppercurrentleadsarefabricatedtomakesuretheheatcurrentcrossingthecut-offpointisleast.ThedetailedparameterofHTScurrentleadssuppliedbytheNorthwestInstituteforNonferrousMetalResearchareintroduced,andtherelationshipofthethermalinterfaceresistancearediscussedtoo.Thirdly,thecryogenicsystemofHighTemp
5、eratureSuperconductiveMagneticEnergystorage(SMES)isintroduced.ItincludesthecoolingplanoftheGMcryocoolertheinsulationandanalysisoftheheatleak.Lastlytheexperimentwasdoneinthecryogenicsystem.Wegetaanalysisreportoftheexperimentdata.Inthispaper,wedesignandfabricatethebinarycurrentleadswhichwereusedi
6、ntheSMESsystemandoperatewell.Keywords:Binarycurrentleads,Refrigerator,Conduction-cooled,ThermodynamicanalysisII华中科技大学硕士学位论文主要符号表2A面积或横截面积，mT温度，K-3-1c比热，JmK∆T温差,K-2-1hc界面热导，WmKW输入功率,WI电流，Ax长度坐标,m-2-1k热导率，WmKdx长度方向微元,m-3L电流引线长度，mρ密度,kg.mp压力，Pa电阻率,Ω.m-2q热流密度，WmσStefan-Bolzmanm常数-8-1Q热量，W5.67×10WK-
7、1S熵，WKε表面黑度，辐射率-1Sgen熵增，WKU电压,V2Jc临界电流密度，A/cmHTSC高温超导电流引线上标、下标H高温端RRR残余电阻率L低温端Cu铜r环境1st一级冷头AIN氮化铝2nd二级冷头min最小值max最大植III独创性声明本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果。尽我所知，除文中已经标明引用的内容外，本论文不包含任何其他个人或集体已经发表或撰写过的研究成果。对本文的研究做出贡献的个人和集体，均已在
