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DC pseudo-glow discharge in nitrogen gas 氮气中的直流伪辉光放电
Plasma Devices and Operations Pub Date : 2009-02-20 DOI: 10.1080/10519990902723720
M. Saudy
{"title":"DC pseudo-glow discharge in nitrogen gas","authors":"M. Saudy","doi":"10.1080/10519990902723720","DOIUrl":"https://doi.org/10.1080/10519990902723720","url":null,"abstract":"The plasma properties from a DC pseudo-discharge have been studied in low-pressure nitrogen gas. The discharge took place between a virtual cathode and a mesh anode similar to a pulsed virtual cathode oscillator or vircators. The electric potential, electric field and space charge density of the glow discharge have been obtained in the axial and radial part of the glow discharge. The location of the virtual cathode was found at around 0.7 cm from the mesh anode. The axial and radial distributions of electron temperature and ion density have been measured using a double electric probe. The electron temperature varied between 0.5 and 1.4 eV, while the ion density varied from 7×1012 to 12×1012 cm−3, outside the electrodes.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"59 1","pages":"88 - 96"},"PeriodicalIF":0.0,"publicationDate":"2009-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87563098","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: 10
Design of a five-channel DCN laser interferometer on EAST EAST上五通道DCN激光干涉仪的设计
Plasma Devices and Operations Pub Date : 2009-02-20 DOI: 10.1080/10519990802646112
Q. Xu, X. Gao, Y. Jie, H. Liu
{"title":"Design of a five-channel DCN laser interferometer on EAST","authors":"Q. Xu, X. Gao, Y. Jie, H. Liu","doi":"10.1080/10519990802646112","DOIUrl":"https://doi.org/10.1080/10519990802646112","url":null,"abstract":"A five-channel far-infrared (FIR) laser interferometer was designed to measure the line averaged electron density on the Experimental Advanced Superconducting Tokamak (EAST). An improved deuterium cyanide laser was used as the light source. The waveguides were used because of a long distance between the laser and the detectors. Each part of the interferometer is described in detail.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"71 1","pages":"16 - 22"},"PeriodicalIF":0.0,"publicationDate":"2009-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73554065","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
Reliability of three-electrode spark gaps 三电极火花间隙的可靠性
Plasma Devices and Operations Pub Date : 2008-11-15 DOI: 10.1080/10519990802433891
P. Osmokrović, N. Arsic, M. Vujisić, K. Stanković, C. Dolicanin
{"title":"Reliability of three-electrode spark gaps","authors":"P. Osmokrović, N. Arsic, M. Vujisić, K. Stanković, C. Dolicanin","doi":"10.1080/10519990802433891","DOIUrl":"https://doi.org/10.1080/10519990802433891","url":null,"abstract":"Two types of three-electrode gas-insulated spark gaps have been investigated in this paper: one with the third electrode located inside the main electrode, and the other with a separate third electrode. Three types of insulating media have been used: vacuum, SF6 and N2. Additionally, three different electrode materials have been implemented: copper, steel and tungsten. The following characteristics have been tested experimentally: the influence of insulating gas parameters on spark gap operation, the influence of the polarity of working and trigger voltages on spark gap operation, and the influence of the rate of rise of the trigger voltage on spark gap operation and the degree of spark gap irreversibility. A theoretical model of the spark gap is presented in the paper, which provides a basis for explaining experimental results depending on specific characteristics of the spark gap.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"174 1","pages":"235 - 245"},"PeriodicalIF":0.0,"publicationDate":"2008-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77616279","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: 24
Studies of fast ion outflow to the helical divertor of the U-3M torsatron U-3M扭激子螺旋导流器快速离子流出的研究
Plasma Devices and Operations Pub Date : 2008-11-15 DOI: 10.1080/10519990802479365
V. Chechkin, L. I. Grigor’eva, Y. L. Sorokovoy, E. Sorokovoy, A. Beletskii, A. S. Slavnyj, Yu. S. Lavrenovich, E. Volkov, P. Burchenko, S. A. Tsybenko, A. V. Lozin, A. Kulaga, N. V. Zamanov, D. V. Kurilo, Yu. K. Mironov, V. S. Romanov
{"title":"Studies of fast ion outflow to the helical divertor of the U-3M torsatron","authors":"V. Chechkin, L. I. Grigor’eva, Y. L. Sorokovoy, E. Sorokovoy, A. Beletskii, A. S. Slavnyj, Yu. S. Lavrenovich, E. Volkov, P. Burchenko, S. A. Tsybenko, A. V. Lozin, A. Kulaga, N. V. Zamanov, D. V. Kurilo, Yu. K. Mironov, V. S. Romanov","doi":"10.1080/10519990802479365","DOIUrl":"https://doi.org/10.1080/10519990802479365","url":null,"abstract":"In the l=3 Uragan–3M torsatron with RF-produced and heated plasmas (ω ≲ ωci), a two-temperature ion distribution with a suprathermal tail is formed. Faster ions (FIs) can be the characteristic of reactor-size stellarators in the long mean free path regime. The presence of the helical divertor offers new opportunities for studying FI loss by measuring ion fluxes and energies in the divertor plasma. Ion energy distributions were measured in divertor flows in two symmetric poloidal cross-sections in several field periods. It is shown that FI flows out to the divertor mainly on the ion B×∇B drift side in accordance with the assumptions of a determinative FI contribution to the plasma divertor flow vertical asymmetry inherent to torsatrons/heliotrons. Strong toroidal non-uniformities in flows and energies of ions outflowing into the divertor are observed. The island structure of the U-3M magnetic configuration and locality of RF power injection are considered as possible reasons for these non-uniformities.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"83 1","pages":"299 - 310"},"PeriodicalIF":0.0,"publicationDate":"2008-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76929071","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: 6
Generation of supershort avalanche electron beams and formation of diffuse discharges in different gases at high pressure 超短雪崩电子束的产生和不同气体高压下漫射放电的形成
Plasma Devices and Operations Pub Date : 2008-11-15 DOI: 10.1080/10519990802478847
V. Tarasenko, E. Baksht, A. G. Burachenko, I. Kostyrya, M. Lomaev, D. Rybka
{"title":"Generation of supershort avalanche electron beams and formation of diffuse discharges in different gases at high pressure","authors":"V. Tarasenko, E. Baksht, A. G. Burachenko, I. Kostyrya, M. Lomaev, D. Rybka","doi":"10.1080/10519990802478847","DOIUrl":"https://doi.org/10.1080/10519990802478847","url":null,"abstract":"This paper presents the results of experimental investigations on the generation of supershort avalanche electron beams (SAEB) at nanosecond discharges initiated in gas-filled diodes. In air, at a pressure of 1 atm with a sharply non-uniform electric field, an SAEB is generated from the inter-electrode gap at a solid angle exceeding 2π sr. Reduction of gap d between the cathode and the anode leads to a decrease in the current amplitude of the beam incident on the lateral walls of the gas-filled diode and in an increase in the pulse duration of the beam current both in the axial and radial directions. Pulses of the beam current initiated on the lateral surface of a tube cathode have been recorded. It is shown that to generate electrons with an ‘anomalous’ energy, cathodes with an increased radius of curvature should be used.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"218 1","pages":"267 - 298"},"PeriodicalIF":0.0,"publicationDate":"2008-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89111199","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: 122
Plasma characterization for nitridation of aluminium alloy using 50 Hz ac discharge 50hz交流放电对铝合金氮化的等离子体表征
Plasma Devices and Operations Pub Date : 2008-11-15 DOI: 10.1080/10519990802442405
M. Shah, R. Ahmad, M. Zakaullah, G. Murtaza
{"title":"Plasma characterization for nitridation of aluminium alloy using 50 Hz ac discharge","authors":"M. Shah, R. Ahmad, M. Zakaullah, G. Murtaza","doi":"10.1080/10519990802442405","DOIUrl":"https://doi.org/10.1080/10519990802442405","url":null,"abstract":"A 50 Hz ac abnormal glow discharge is characterized as a function of filling pressure (1–4 mbar) using a Langmuir probe. It is found that electron temperature, electron density and electron energy distribution function decrease with the gas filling pressure. Nitriding of aluminum alloy (Al–Mg2–Si) is performed for various time durations (3, 6, 9 and 12 h) and pressures (1 and 2 mbar) by keeping the input power (100 W) and substrate temperature (250 °C) constant. To explore the surface properties induced by plasma, X-ray diffractometer, optical micrography, atomic force microscopy and Vickers micro-hardness tester diagnostic techniques are used. Results exhibit the formation of cubic aluminum nitride. A significant increase in surface hardness is observed when samples are exposed at 1 mbar pressure for 12 h of processing time. A rapid decrease in surface hardness values with the imposed load suggests the formation of a thin modified surface layer.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"44 1","pages":"247 - 266"},"PeriodicalIF":0.0,"publicationDate":"2008-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88608332","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
Assessment of error field from ferromagnetic surrounding of ITER tokamak: ferromagnetic rebar of tokamak complex building ITER托卡马克铁磁环境的误差场评估:托卡马克建筑群的铁磁钢筋
Plasma Devices and Operations Pub Date : 2008-11-15 DOI: 10.1080/10519990802433875
V. Amoskov, A. Belov, V. Belyakov, Y. Gribov, V. Kukhtin, E. Lamzin, N. Maximenkova, S. Sytchevsky
{"title":"Assessment of error field from ferromagnetic surrounding of ITER tokamak: ferromagnetic rebar of tokamak complex building","authors":"V. Amoskov, A. Belov, V. Belyakov, Y. Gribov, V. Kukhtin, E. Lamzin, N. Maximenkova, S. Sytchevsky","doi":"10.1080/10519990802433875","DOIUrl":"https://doi.org/10.1080/10519990802433875","url":null,"abstract":"Error fields produced by the ferromagnetic rebar of the building of the ITER tokamak complex have been studied. It is shown that the ‘3-mode’ error field produced by the global asymmetry of the building is about 2×10−6 of the toroidal magnetic field. Analysis of error fields caused by local asymmetry of the ferromagnetic elements was performed for the one nearest to the tokamak ferromagnetic structure, bioshield. It was shown that the bioshield produces an error field less than 10−5 of the toroidal magnetic field. Such error fields are acceptable.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"570 1","pages":"225 - 233"},"PeriodicalIF":0.0,"publicationDate":"2008-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80573943","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: 8
Successful production of non-neutral electron plasma of high density in the multi-ring trap 在多环阱中成功产生了高密度的非中性电子等离子体
Plasma Devices and Operations Pub Date : 2008-08-26 DOI: 10.1080/10519990802259460
T. Mohamed
{"title":"Successful production of non-neutral electron plasma of high density in the multi-ring trap","authors":"T. Mohamed","doi":"10.1080/10519990802259460","DOIUrl":"https://doi.org/10.1080/10519990802259460","url":null,"abstract":"Accumulation of electrons to form dense electron plasma in a modified Malmberg–Penning trap, a multi-ring trap (MRT), is investigated. Under ultra-high vacuum conditions, the electron plasma is confined radially using a 5 T magnetic field and axially by using a harmonic potential well of depth 1000 V. Electron plasma of density higher than 1×1011 cm−3 was confined in the MRT, and the number of trapped electrons can be controlled by changing the trap depth and the trap length. A longitudinal plasma temperature of 0.1 eV was measured, and the cyclotron cooling time was found to scale as 4.5/B 2 (T).","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"49 1","pages":"181 - 188"},"PeriodicalIF":0.0,"publicationDate":"2008-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73811169","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
Design, construction and the first experiments on the Amirkabir Plasma Focus (APF) facility 阿米尔卡比尔等离子体焦点(APF)设施的设计、建造和首次实验
Plasma Devices and Operations Pub Date : 2008-08-26 DOI: 10.1080/13533310802240111
M. Habibi, R. Amrollahi, M. Attaran, R. Etaati
{"title":"Design, construction and the first experiments on the Amirkabir Plasma Focus (APF) facility","authors":"M. Habibi, R. Amrollahi, M. Attaran, R. Etaati","doi":"10.1080/13533310802240111","DOIUrl":"https://doi.org/10.1080/13533310802240111","url":null,"abstract":"A new low-cost Mather-type plasma focus facility (16 kV, 36 μf and 115 nH) was designed and constructed for the first time in Iran. The conceptual design of the device performed by MATLAB is based on the three-phase theory of the plasma focus mechanism. We tried to design a convenient control unit which automatically controls charge–discharge processes. Optimum pressures at various applied voltages, a linear dependence between the plasma pinch current and applied voltage at the optimum pressure with Ar and Ne as working gases and also the focusing time proportional to the gas pressure with Ar were obtained experimentally. Hard X-ray signals tended to decrease with the pressure when Ne was puffed into the chamber.","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"26 1","pages":"163 - 169"},"PeriodicalIF":0.0,"publicationDate":"2008-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77488112","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: 26
Corrigendum: New ellipsoid cavity model for high-intensity laser–plasma interaction 勘误:用于高强度激光-等离子体相互作用的新椭球腔模型
Plasma Devices and Operations Pub Date : 2008-08-26 DOI: 10.1080/10519990802384144
P. Zobdeh, R. Sadighi-Bonabi, H. Afarideh
{"title":"Corrigendum: New ellipsoid cavity model for high-intensity laser–plasma interaction","authors":"P. Zobdeh, R. Sadighi-Bonabi, H. Afarideh","doi":"10.1080/10519990802384144","DOIUrl":"https://doi.org/10.1080/10519990802384144","url":null,"abstract":"","PeriodicalId":54600,"journal":{"name":"Plasma Devices and Operations","volume":"5 1","pages":"223 - 223"},"PeriodicalIF":0.0,"publicationDate":"2008-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75442401","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
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