基于碳纳米管的场离子发射的研究

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1、ABSTRACTMeanwhile,wealsocomparedthedifferentlengthsofcarbonnanotubestoinvestigatetheperformanceoffieldionemissioninthehydrogenenvironment.Moreover,wealsoexaminedthestabilityatdifferentionemissioncurrentataconstanceanodevoltage.(4)Weproposedfieldionemissioncathodecomponentb

2、asedonaouter-gatestructure.Thiscomponentcaneffectivelyavoidthetinderandbreakdownoftraditionalcone-basedSpindtcathodearray.Andwesimulatedthetransistorstructure.(5)Wepreparedthefieldionemissoncathodecomponent,andweldedthegridonthegatesuccessfully,followedbyaassemblingofthewh

3、olecomponent.Keywords:neutrontube,ionemission,carbonnanotubes,simulationdesign,triodestructureIII目录目录第一章绪论....................................................................................................................11.1课题背景、价值和意义.....................................

4、...................................................11.2课题的研究历史、现状及存在的问题................................................................31.3本论文的结构安排................................................................................................6第二章碳纳米管和场致离子发射...............

5、.................................................................82.1碳纳米管简述........................................................................................................82.2碳纳米管的制备...................................................................................

6、...............102.2.1直接电弧放电法...........................................................................................112.2.2激光蒸发法...................................................................................................112.2.3气相沉积法..............................

7、....................................................................122.3碳纳米管的场致电子发射机理..........................................................................122.4场致离子发射机理..............................................................................................132.4.

8、1离子源简介...................................................................................