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Electromagnetic loads and magnetoelastic stability of the in-vessel poloidal field coils of the T-15 upgrade T-15升级舰载极向磁场线圈的电磁载荷和磁弹性稳定性
Plasma Devices and Operations Pub Date : 2009-09-01 DOI: 10.1080/10519990902957963
A. Alekseev
{"title":"Electromagnetic loads and magnetoelastic stability of the in-vessel poloidal field coils of the T-15 upgrade","authors":"A. Alekseev","doi":"10.1080/10519990902957963","DOIUrl":"https://doi.org/10.1080/10519990902957963","url":null,"abstract":"Electromagnetic forces and possible magnetoelastic buckling caused by interaction with the toroidal magnetic field are analysed for the in-vessel poloidal field coils of the tokamak T-15 upgrade. Analytical expressions for the forces and critical currents have been derived. The analysis shows that the stiffness of the in-vessel coils provides the stability of the coils with sufficient safety margins.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"1 1","pages":"201 - 206"},"PeriodicalIF":0.0,"publicationDate":"2009-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88700939","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
Conversion of a left-hand circularly polarized whistler wave into the magnetic energy of a controllable helical wiggler wave 左旋圆极化哨声波转换成可控螺旋摆动波的磁能
Plasma Devices and Operations Pub Date : 2009-06-19 DOI: 10.1080/10519990902957955
Z. Trifković, P. Osmokrović
{"title":"Conversion of a left-hand circularly polarized whistler wave into the magnetic energy of a controllable helical wiggler wave","authors":"Z. Trifković, P. Osmokrović","doi":"10.1080/10519990902957955","DOIUrl":"https://doi.org/10.1080/10519990902957955","url":null,"abstract":"A linearly polarized electromagnetic source wave splits into six traveling wave modes (three of them are right-hand circularly-polarized (RCP) modes and three are left-hand circularly-polarized (LCP) modes) due to the interaction with a suddenly created magnetoplasma medium. When the angular frequency of the source wave is in the low-frequency region, the magnetoplasma supports two whistler wave modes (one is the transmitted RCP and the other is the reflected LCP). It is shown that the efficiency of energy conversion of the LCP whistler wave mode into the magnetic field of the wiggler is nearly of the same order of magnitude as the efficiency of the previously considered energy conversion of the RCP whistler wave mode.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"560 1","pages":"215 - 220"},"PeriodicalIF":0.0,"publicationDate":"2009-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85988190","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
The vacuum system of the J-TEXT tokamak J-TEXT托卡马克的真空系统
Plasma Devices and Operations Pub Date : 2009-06-19 DOI: 10.1080/10519990902957989
Y. Ding, G. Zhuang, W. J. Wang, J. Yao, X. Q. Zhang, Y. Pan
{"title":"The vacuum system of the J-TEXT tokamak","authors":"Y. Ding, G. Zhuang, W. J. Wang, J. Yao, X. Q. Zhang, Y. Pan","doi":"10.1080/10519990902957989","DOIUrl":"https://doi.org/10.1080/10519990902957989","url":null,"abstract":"A new vacuum system is designed and developed on the Joint Texas Experimental tokamak (J-TEXT), which consists of two pumping stations, a Taylor discharge cleaning (TDC) system and gas puffing. With this system, the vacuum vessel of the J-TEXT tokamak can easily reach the vacuum conditions which allow the operation of the machine. The sub-control system of the vacuum pumping systems with the self-protection function is reliable and easy to use. Inside the chamber, the base pressure can be lowered to 6.4×10−6 Pa, and the total leakage and outgassing rates in 12 h is below 1.5×10−8 Pa m3/s. Moreover, the TDC sub-system is used to clean the first facing walls of vacuum chamber to guarantee good wall conditions of the device before each run of the experimental campaign on the J-TEXT tokamak. The basic functions of the vacuum system meet the essential requirements for the present experiments on the J-TEXT tokamak.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"29 1","pages":"207 - 214"},"PeriodicalIF":0.0,"publicationDate":"2009-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75576156","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
A spectral resolution of Johann-type X-ray spectrometers 约翰型x射线光谱仪的光谱分辨率
Plasma Devices and Operations Pub Date : 2009-06-19 DOI: 10.1080/10519990902957948
M. Stepanenko
{"title":"A spectral resolution of Johann-type X-ray spectrometers","authors":"M. Stepanenko","doi":"10.1080/10519990902957948","DOIUrl":"https://doi.org/10.1080/10519990902957948","url":null,"abstract":"This paper presents the analysis of the geometrical components in the evaluation of the spectral resolution of X-ray bent crystal spectrometers. A toroidal Johann–Johansson type spectrometer is suggested and its resolution is estimated. Emphasis is made on the study of asymmetrically cut schemes. Generally used expansion techniques up to second order are added by calculations of the third term where second order becomes zero.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"19 1","pages":"191 - 200"},"PeriodicalIF":0.0,"publicationDate":"2009-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84373875","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
Generation of microplasma using multiwall carbon nanotubes cathode 利用多壁碳纳米管阴极产生微等离子体
Plasma Devices and Operations Pub Date : 2009-06-19 DOI: 10.1080/10519990902957930
Q. Zou, Y. Li, M. Wang, Y. C. Zhao, L. Zou
{"title":"Generation of microplasma using multiwall carbon nanotubes cathode","authors":"Q. Zou, Y. Li, M. Wang, Y. C. Zhao, L. Zou","doi":"10.1080/10519990902957930","DOIUrl":"https://doi.org/10.1080/10519990902957930","url":null,"abstract":"Microplasma was produced in argon gas in a scanning electron microscope at near-atmospheric pressure using a multi-wall carbon nanotube (CNT) film as a cathode. It is demonstrated that with the CNT film used as a cathode, the breakdown voltage was much lower than the breakdown voltage when the conventional cathode made of flat metal film was used and the discharge was highly reproducible. These features of the gas discharge are defined by the field emission from the CNT cathode.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"44 1","pages":"181 - 190"},"PeriodicalIF":0.0,"publicationDate":"2009-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81398514","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: 7
Fabrication of carbon nanomaterials using pulse microplasma in SEM 脉冲微等离子体在扫描电镜下制备碳纳米材料
Plasma Devices and Operations Pub Date : 2009-06-19 DOI: 10.1080/10519990902957807
Q. Zou, M. Wang, Y. Li, L. Zhou
{"title":"Fabrication of carbon nanomaterials using pulse microplasma in SEM","authors":"Q. Zou, M. Wang, Y. Li, L. Zhou","doi":"10.1080/10519990902957807","DOIUrl":"https://doi.org/10.1080/10519990902957807","url":null,"abstract":"Synthesis of carbon nanomaterials by pulse microplasma in the chamber of a scanning electron microscope equipped with a special discharge cell is reported. The peak current density of the methane microplasma was higher than 5 kA cm−2, and the pulse width was almost 10 ns. After 5 s operation, there could be observed some carbon nanomaterials deposited on the cathode of the platinum film besides melted spots.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"37 1","pages":"175 - 180"},"PeriodicalIF":0.0,"publicationDate":"2009-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90051128","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
Heterodyne detection system of frequency hopping microwave reflectometer for Alfvén eigenmode measurements in LHD 跳频微波反射计的外差检测系统，用于LHD中alfv<s:1>本征模测量
Plasma Devices and Operations Pub Date : 2009-05-19 DOI: 10.1080/10519990902909444
T. Tokuzawa, A. Ejiri, K. Kawahata, LHD experimental group
{"title":"Heterodyne detection system of frequency hopping microwave reflectometer for Alfvén eigenmode measurements in LHD","authors":"T. Tokuzawa, A. Ejiri, K. Kawahata, LHD experimental group","doi":"10.1080/10519990902909444","DOIUrl":"https://doi.org/10.1080/10519990902909444","url":null,"abstract":"In order to measure the internal structure of fluctuation, a broadband frequency-tunable system, which has a fast and stable hopping operation, has been developed in the large helical device. For constructing an accurate heterodyne phase detection system, a single-sideband (SSB) modulation technique is applied. Recently, high performance (SSB) modulators have been available in the wide band frequency range and its sideband rejection is around−20 dB. The frequency multiplier and mixer deformed the signal and the band-pass filter is used effectively to attain high signal-to-noise ratio.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"1 1","pages":"126 - 131"},"PeriodicalIF":0.0,"publicationDate":"2009-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82745971","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
Formation and mitigation of fiberform nanostructured tungsten by helium and sub-ms laser pulse irradiations 氦和亚毫秒激光脉冲辐照形成和减缓纤维状纳米结构钨
Plasma Devices and Operations Pub Date : 2009-05-19 DOI: 10.1080/10519990902884563
S. Kajita, W. Sakaguchi, N. Ohno
{"title":"Formation and mitigation of fiberform nanostructured tungsten by helium and sub-ms laser pulse irradiations","authors":"S. Kajita, W. Sakaguchi, N. Ohno","doi":"10.1080/10519990902884563","DOIUrl":"https://doi.org/10.1080/10519990902884563","url":null,"abstract":"Fiberform nanostructured tungsten is formed on tungsten surface by helium plasma irradiation under a specific condition. It is revealed that the optical reflectivity of tungsten is significantly decreased by the formation of the nanostructure. We present the experimentally obtained necessary condition to form the structure in the linear plasma device NAGDIS-II. We investigate the effects of laser irradiation to the helium-irradiated surface on the optical reflectivity. It is revealed that the sub-ms laser pulse irradiation alleviates the surface roughness and recovers the optical reflectivity. However, when the structure is finer, the recovery rate becomes low, typically less than half; moreover, it decreases with the number of pulses.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"50 1","pages":"165 - 173"},"PeriodicalIF":0.0,"publicationDate":"2009-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73033642","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
Low-energy particle interaction with plasma-irradiated metal surfaces 低能粒子与等离子体辐照金属表面的相互作用
Plasma Devices and Operations Pub Date : 2009-05-19 DOI: 10.1080/10519990902884746
M. Wada, T. Kenmotsu, Y. Matsumoto, M. Nishiura, M. Sasao, K. Tsumori, H. Yamaoka
{"title":"Low-energy particle interaction with plasma-irradiated metal surfaces","authors":"M. Wada, T. Kenmotsu, Y. Matsumoto, M. Nishiura, M. Sasao, K. Tsumori, H. Yamaoka","doi":"10.1080/10519990902884746","DOIUrl":"https://doi.org/10.1080/10519990902884746","url":null,"abstract":"In fusion experiments, plasma erodes walls of devices containing various elements including carbon. The eroded carbon penetrates into edge plasma and is transported backwards forming the carbon-adsorbed layers on the surfaces of components like mirrors for optical plasma diagnostics. To characterize the carbon-adsorbed layers by measuring energy distribution of particles reflected from the surface, we have used the experimental setup equipped with a magnetic deflection momentum analyzer and the time-of-flight energy analyzer of neutrals. Ion beams in the energy range 1–2 keV irradiated the samples of Mo and W with carbon deposition on them that were prepared in separate plasma chambers. The beams produced ions and neutrals with characteristic emission angle and energy distribution depending upon conditions of the sample surfaces. Experimental results are compared with the numerical calculation model ACAT (Atomic Collisions in Amorphous Targets) and the evaluations on how the structure of deposition layers may affect the particle reflection on solid surfaces were made.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"204 1","pages":"132 - 143"},"PeriodicalIF":0.0,"publicationDate":"2009-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76573739","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
Modification of optical characteristics of metallic amorphous mirrors under ion bombardment 离子轰击下金属非晶态反射镜光学特性的改变
Plasma Devices and Operations Pub Date : 2009-05-19 DOI: 10.1080/10519990902903595
V. Voitsenya, A. F. Bardamid, A. Belyaeva, V. N. Bondarenko, A. Galuza, V. Konovalov, I. Ryzhkov, A. Savchenko, A. N. Shapoval, A. F. Shtan, S. I. Solodovchenko, K. Yakimov
{"title":"Modification of optical characteristics of metallic amorphous mirrors under ion bombardment","authors":"V. Voitsenya, A. F. Bardamid, A. Belyaeva, V. N. Bondarenko, A. Galuza, V. Konovalov, I. Ryzhkov, A. Savchenko, A. N. Shapoval, A. F. Shtan, S. I. Solodovchenko, K. Yakimov","doi":"10.1080/10519990902903595","DOIUrl":"https://doi.org/10.1080/10519990902903595","url":null,"abstract":"In-vessel mirrors are necessary for optical diagnostics of plasmas in next-step fusion devices. These mirrors will be under the influence of the harsh fusion environment, and in these conditions the mirror material should perform its functions. This article describes experiments that have been carried out to evaluate the prospect of amorphous mirrors retaining their optical characteristics under the impact of deuterium or argon plasma ions of different energy. The experiments were undertaken with the use of mirror samples prepared from amorphous alloys Vitreloy-1 and Vitreloy-4. The data reported demonstrate the principal ability of mirrors made of amorphous materials to preserve the initial optical quality in the process of long-term sputtering, and should be considered as proof of the possibility of using amorphous metal mirrors in the erosion-dominated zone of a fusion reactor.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"101 1","pages":"144 - 154"},"PeriodicalIF":0.0,"publicationDate":"2009-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80447892","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: 15
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