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Compact gyrotron systems for Dynamic Nuclear Polarization NMR spectroscopy 用于动态核极化核磁共振波谱的紧凑型回旋管系统
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262185
J. Sirigiri, T. Maly, L. Tarricone
{"title":"Compact gyrotron systems for Dynamic Nuclear Polarization NMR spectroscopy","authors":"J. Sirigiri, T. Maly, L. Tarricone","doi":"10.1109/IVEC.2012.6262185","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262185","url":null,"abstract":"We will present the theoretical design and experimental results from a fundamental cyclotron mode 198 GHz, 5 W and a second harmonic 395 GHz, 20 W gyrotrons being developed for application in Dynamic Nuclear Polarization (DNP) enhanced NMR spectroscopy.","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"216 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":"130211695","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: 2
A 250 GHz photonic band gap gyrotron traveling wave amplifier 250 GHz光子带隙回旋管行波放大器
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262218
E. Nanni, M. Shapiro, R. Temkin
{"title":"A 250 GHz photonic band gap gyrotron traveling wave amplifier","authors":"E. Nanni, M. Shapiro, R. Temkin","doi":"10.1109/IVEC.2012.6262218","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262218","url":null,"abstract":"A 250 GHz gyrotron traveling wave tube (gyro-TWT) for nanosecond pulse amplification with 1 kW peak power and gain exceeding 50 dB has been designed and is under construction. The amplifier uses a novel photonic band gap (PBG) interaction circuit that confines a TE03-like mode while providing lower-order mode suppression. Cold test results for the transmission line, input coupler, PBG waveguide and mode converter are presented. A triode electron gun designed for this amplifier has been constructed. Ongoing experimental installation and cold test results for the photonic structure will be discussed.","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"15 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":"115692583","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: 4
2.8 MWp 352 MHz long pulse klystron for proton linac 2.8 MWp 352 MHz质子直线加速器长脉冲速调管
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262180
A. Beunas, R. Marchesin, E. Rampnoux, J. Lesrel
{"title":"2.8 MWp 352 MHz long pulse klystron for proton linac","authors":"A. Beunas, R. Marchesin, E. Rampnoux, J. Lesrel","doi":"10.1109/IVEC.2012.6262180","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262180","url":null,"abstract":"Thales has designed and is currently manufacturing a prototype of a high power, long pulse 2.8 MW 210 kW 1.5 ms klystron operating at 352.2 MHz, for use in proton linac and in accelerator cavities test stands. Details of the design and test results will be presented.","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"9 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":"114455209","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: 3
An investigation of sustainable machining performance for controlled surface quality requirements in high temperature and refractory alloys, setting a new direction for machining research and development — Cryogenics (LIN) 高温和难熔合金可控表面质量要求的可持续加工性能研究，为加工研究和发展开辟新方向——低温(LIN)
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262241
M. Effgen, I. Jawahir
{"title":"An investigation of sustainable machining performance for controlled surface quality requirements in high temperature and refractory alloys, setting a new direction for machining research and development — Cryogenics (LIN)","authors":"M. Effgen, I. Jawahir","doi":"10.1109/IVEC.2012.6262241","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262241","url":null,"abstract":"This paper reports on the ongoing work related to the study of cryogenic machining for controlled surface quality requirements on porous tungsten and high temperature refractory alloys.","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"1 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":"114577438","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
Exploitation of Q/V-band for future broadband telecommunication satellites 未来宽带通信卫星Q/ v波段的开发
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262191
M. Aloisio, P. Angeletti, F. Coromina, R. De Gaudenzi
{"title":"Exploitation of Q/V-band for future broadband telecommunication satellites","authors":"M. Aloisio, P. Angeletti, F. Coromina, R. De Gaudenzi","doi":"10.1109/IVEC.2012.6262191","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262191","url":null,"abstract":"In order to support the deployment of satellite broadband services able to satisfy the growing need for broadcast interactive applications, future broadband telecommunication satellites will have to exploit frequencies beyond Ka-band. This entails new key challenges and the use of critical techniques and technologies, which will be discussed.","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"9 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":"114850071","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: 17
Improved field emission property of ZnO/CNTs composites by adding a graphene resistive layer 添加石墨烯电阻层改善ZnO/CNTs复合材料的场发射性能
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262090
Chao Wang, Zhiwei Zhao, Yongqiang Chen, Jun Yan
{"title":"Improved field emission property of ZnO/CNTs composites by adding a graphene resistive layer","authors":"Chao Wang, Zhiwei Zhao, Yongqiang Chen, Jun Yan","doi":"10.1109/IVEC.2012.6262090","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262090","url":null,"abstract":"ZnO/CNTs composites were used to fabricate the field emission layer onto electrode by screen printing process. Through adding a graphene resistive layer between the electrode and the emission layer, the turn-on field was decreased from 1.6 v/μm to 1.0 v/μm; the emission uniformity and the emission stability were improved apparently.","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"29 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":"117062833","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
Design and simulation of 94GHz Magnetron Injection Gun 94GHz磁控管注射枪的设计与仿真
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262255
C. Lei, Sheng Yu, X. Niu, Ying-hui Liu, Jian-Peng Guo, Shenyong Hou, Yusheng Zhao
{"title":"Design and simulation of 94GHz Magnetron Injection Gun","authors":"C. Lei, Sheng Yu, X. Niu, Ying-hui Liu, Jian-Peng Guo, Shenyong Hou, Yusheng Zhao","doi":"10.1109/IVEC.2012.6262255","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262255","url":null,"abstract":"This paper reports the results about a Magnetron Injection Gun(MIG) designed recently. This gun can work at frequency 94GHz for gyrostron. After lots of optimizings and simulations about the structure, at the coefficient of magnetic field 0.8313(3.5755T), beam voltage 24KV, and beam current 2A, it was observed that the electron ratio 1.4, the maximum transverse velocity spread less than 2.7%, the longitudinal velocity about 5.7%. The gun was used for a 94GHz gyrotron, it was obtained that the output power of about 25KW with efficiency 53%(SDC).","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"47 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":"117260082","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
Comparison of different methods of suppression of self-excitation broadband TWT on a backward wave in view of a beam expansion 考虑波束膨胀的自激宽带行波管后向波抑制方法的比较
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262158
A. Danilov, E. M. Il'ina, A. D. Rafalovich
{"title":"Comparison of different methods of suppression of self-excitation broadband TWT on a backward wave in view of a beam expansion","authors":"A. Danilov, E. M. Il'ina, A. D. Rafalovich","doi":"10.1109/IVEC.2012.6262158","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262158","url":null,"abstract":"The start currents of self-excitation of traveling- wave tube (TWT) on a backward wave in view of an electron beam expansion in a dynamic mode are calculated. Efficiencies of self-excitation suppression by jump of pitch of a TWT slow-wave structure (SWS) with normal dispersion (ND) along all length, by jump of pitch and dispersion steepness in TWT with abnormal dispersion (AD) in output section, by jump of beam channel diameter and by jump of field phase in both types of devices are compared.","PeriodicalId":324211,"journal":{"name":"IVEC 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":"123716711","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
Analysis of reflections of the output port on saturated power in TE01 gyrotron traveling wave amplifier TE01回旋管行波放大器输出端对饱和功率的反射分析
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262257
S. Haiyan, Jiang Yanfeng, Cai Xingquan
{"title":"Analysis of reflections of the output port on saturated power in TE01 gyrotron traveling wave amplifier","authors":"S. Haiyan, Jiang Yanfeng, Cai Xingquan","doi":"10.1109/IVEC.2012.6262257","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262257","url":null,"abstract":"Based on the nonlinear self-consistent theory of gyrotron traveling wave amplifier (gyro-TWA), the influence of the reflections of the output port with the taper on the beam-wave interaction in the gyro-TWA is studied. The simulation results show that the amplitude and phase of the reflection coefficient varying with the increase of the taper angle, and the interaction length varying have great effect on the beam-wave interaction and the power profile for the 35GHz TE01 gyro-TWA. The saturated power keeps same approximately, but the saturated gain decreases with the increase of the taper angle under same interaction length.","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"218 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":"121966961","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
1.5 MW, 110 GHz gyrotron breakdown in air 1.5兆瓦，110千兆赫回旋加速器在空气中击穿
IVEC 2012 Pub Date : 2012-04-24 DOI: 10.1109/IVEC.2012.6262186
J. Hummelt, A. Cook, M. Shapiro, R. Temkin
{"title":"1.5 MW, 110 GHz gyrotron breakdown in air","authors":"J. Hummelt, A. Cook, M. Shapiro, R. Temkin","doi":"10.1109/IVEC.2012.6262186","DOIUrl":"https://doi.org/10.1109/IVEC.2012.6262186","url":null,"abstract":"We present experimental measurements of breakdown in atmospheric pressure air created by a 3 μs pulse length, 1.5 MW, 110 GHz gyrotron producing a quasioptical beam. The linearly polarized focused beam creates a plasma that exhibits a filamentary array of streamers. We use a fast gating camera to measure the time evolution of the plasma filaments and their free space expansion velocity. Microwave measurements show that the scattering of incident microwaves by the plasma through an angular distribution agrees with what is predicted by diffraction of the microwave beam after being absorbed by the plasma. We use a fast gating, high-resolution spectrometer and a broadband spectrometer to measure breakdown plasma temperatures and compare with previous microwave breakdown experiments.","PeriodicalId":324211,"journal":{"name":"IVEC 2012","volume":"1 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":"128166634","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: 4
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