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Variations in properties of Mo-Re sheet — Effects on dispenser cathode fabrication Mo-Re片材性能的变化-对分配器阴极制作的影响
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264203
J. Tarter, P. Swartzentruber, J. Balk, A. Fryman, C. Rabek, A. Batts
{"title":"Variations in properties of Mo-Re sheet — Effects on dispenser cathode fabrication","authors":"J. Tarter, P. Swartzentruber, J. Balk, A. Fryman, C. Rabek, A. Batts","doi":"10.1109/IVESC.2012.6264203","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264203","url":null,"abstract":"Moly Rhenium 50-50 alloy sheet commonly used in cathode and other high temperature compatible structures was evaluated using XRD, tensile testing, micro hardness, and metallography. The results were correlated with observed mechanical properties. Material condition and properties can be optimized for manufacturing.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125949606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Research on sintering and fabrication of advanced cathodes 先进阴极的烧结与制备研究
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264207
L. Falce, L. Ives, G. Collins, D. Marsden
{"title":"Research on sintering and fabrication of advanced cathodes","authors":"L. Falce, L. Ives, G. Collins, D. Marsden","doi":"10.1109/IVESC.2012.6264207","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264207","url":null,"abstract":"The latest generation of high current density cathodes is placing greater demands on sintering procedures and fabrication techniques. As cathode size decreases, greater demands are placed on porosity control, materials, and bonding techniques and procedures. This research is focused on improving the processes and procedures used in production of high current density cathodes.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126011464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced field emission density current of a planar triode structure with double cathodes 双阴极平面三极管结构的增强场发射密度电流
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264193
L. Zheng, Zhuoya Zhu, W. Lei, Xiaobing Zhang, Huan Feng, Yajun Sun, Zheng Hu
{"title":"Enhanced field emission density current of a planar triode structure with double cathodes","authors":"L. Zheng, Zhuoya Zhu, W. Lei, Xiaobing Zhang, Huan Feng, Yajun Sun, Zheng Hu","doi":"10.1109/IVESC.2012.6264193","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264193","url":null,"abstract":"Field emission properties of a planar triode structure with double cathodes have been investigated. ZnO nanotetrapod emitters mixed with carbon nanotubes(CNTs) were fabricated by the screen-printing method. The potential distribution, electron trajectoryies distribution and current density distribution were simulated in detail with CST PARTICLE STUDIO code. A higher field emission density current was obtained in the double-cathode structure. We found the gate played an important role in the anode current enhancement by focusing effect.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125447838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of outgassing on the field emission property of screen-printed CNTs 出气对网印碳纳米管场发射性能的影响
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264209
Yunkang Cui, Xiaobing Zhang, W. Lei, Y. Di, Jing Chen, Qilong Wang
{"title":"Effect of outgassing on the field emission property of screen-printed CNTs","authors":"Yunkang Cui, Xiaobing Zhang, W. Lei, Y. Di, Jing Chen, Qilong Wang","doi":"10.1109/IVESC.2012.6264209","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264209","url":null,"abstract":"To study the mechanism of current degradation of a cold cathode, the outgassing measurement of a field emission diode with screen-printed CNTs cathode has been taken with a quadrupole mass spectrometer (QMS) in an ultra-high vacuum (UHV) system. It was found that the H2, CO2, and CO were outgassed from the diode during the working process. The field emission properties of the cold cathode, such as turn-on field, threshold field and the emission current density, were largely related to the pressure of the outgases. From the outgassing experimental results, the relations between the emission current degradation and the outgassing of field emission devices have been found.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131307251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DC emission characteristic of Sc- Doped Impregnated Dispenser cathodes 掺钪浸渍分点阴极的直流发射特性
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264176
Xi Wang, W. Liu, Yiman Wang, Yuntao Cui, Jinshu Wang
{"title":"DC emission characteristic of Sc- Doped Impregnated Dispenser cathodes","authors":"Xi Wang, W. Liu, Yiman Wang, Yuntao Cui, Jinshu Wang","doi":"10.1109/IVESC.2012.6264176","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264176","url":null,"abstract":"Emission properties of Scandia Doped Impregnated (SDI) cathodes tested at DC model has been investigated in close-spaced diodes with water-cooled copper anodes. Space Charge Limited (SCL) current density of over 40 A/cm2 has been measured at 950°Cb after temperature compensation for electron cooling. The life test has lasted for more than 500 hours and is going on.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130322377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
100 A/cm2 high emission current density oxide cathode 100 A/cm2高发射电流密度氧化物阴极
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264160
Xiaoxia Wang, Min Zhang, X. Liao, J. Luo, Qinglan Zhao, Yun Li, Qi Zhang
{"title":"100 A/cm2 high emission current density oxide cathode","authors":"Xiaoxia Wang, Min Zhang, X. Liao, J. Luo, Qinglan Zhao, Yun Li, Qi Zhang","doi":"10.1109/IVESC.2012.6264160","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264160","url":null,"abstract":"In this paper we mainly describes the research progress in a kind of plasma spraying coating oxide cathode, which includes the preparation of Ni-Sc sponge layer and plasma spraying Sc doped coating and the properties testing. The testing results show that the dc emission current density of the cathode is over 4A/cm2 and the pulse emission current density reaches 103 A/cm2 with a 1μs pulse width at a temperature of 850°C br.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"23 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122505915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Improved electron emission from W-Ir dispenser cathodes 改进了W-Ir分配器阴极的电子发射
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264198
M. Ravi, K. Kumar, P. D. Devi, K. S. Bhat, L. Kumar
{"title":"Improved electron emission from W-Ir dispenser cathodes","authors":"M. Ravi, K. Kumar, P. D. Devi, K. S. Bhat, L. Kumar","doi":"10.1109/IVESC.2012.6264198","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264198","url":null,"abstract":"W-Ir dispenser cathodes have been fabricated with lithium oxide doped impregnant mix and tested for their emission characteristics in a closely spaced diode configuration. With Li2O doping, emission current density improved from 7.5 to 32 A/cm2 at 1075°C. 32000 hours of life as on date has been measured.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134250921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
“Much ado about nothing”: Electron sources and transport in vacuum “无事生非”:真空中的电子源和输运
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264157
K. Jensen
{"title":"“Much ado about nothing”: Electron sources and transport in vacuum","authors":"K. Jensen","doi":"10.1109/IVESC.2012.6264157","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264157","url":null,"abstract":"How electron emission is generated from photo, secondary, field and thermionic sources affects their vacuum transport characteristics and therefore their utility for differing Vacuum Electronic applications. Complications associated with emission processes will be related to desirable features of the beams produced in terms of current density, lifetime, space charge, beam halo, emittance, and response time, as well as limitations imposed by the emission mechanisms.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122436543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced field emission from ZnO-CNTs composite emitters with CsI nanoparticles 纳米CsI增强ZnO-CNTs复合发射体的场发射
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264165
Zhuoya Zhu, Xiaofei Hao, W. Lei, Xiaobing Zhang, Huan Feng, Yajun Sun
{"title":"Enhanced field emission from ZnO-CNTs composite emitters with CsI nanoparticles","authors":"Zhuoya Zhu, Xiaofei Hao, W. Lei, Xiaobing Zhang, Huan Feng, Yajun Sun","doi":"10.1109/IVESC.2012.6264165","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264165","url":null,"abstract":"CsI nanoparticles were introduced to ZnO-CNTs composite field emitters through screen-printing process. Enhanced field emission properties were obtaind after coating or mixing CsI during ZnO-CNTs composite emitters fabrication. Further improved field emission properties from CsI-mixed ZnO-CNTs emitters are observed, and a low turn on electric field of 1.6V/um is achieved.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128673070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of scandate cathode and its prospect_ a review 钪阴极的研究进展及展望
IVESC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVESC.2012.6264158
Yiman Wang, Jinshu Wang, W. Liu
{"title":"Development of scandate cathode and its prospect_ a review","authors":"Yiman Wang, Jinshu Wang, W. Liu","doi":"10.1109/IVESC.2012.6264158","DOIUrl":"https://doi.org/10.1109/IVESC.2012.6264158","url":null,"abstract":"Summary form only given. High current density scandate cathodes have aroused great interest in recent years. In this paper the emission performances of scandate cathodes and the possible chemical and physical processes occurred during cathode manufacturing and operation are summarized. Emission mechanisms are further discussed. The major problems of this kind of cathode and its application prospects are reviewed.","PeriodicalId":249267,"journal":{"name":"IVESC 2012","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131725152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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