共查询到20条相似文献,搜索用时 15 毫秒
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Söldner FX McCormick K Eckhartt D Kornherr M Leuterer F Bartiromo R Becker G Bosch HS Brocken H Derfler H Eberhagen A Fussmann G Gehre O Gernhardt J Gierke Gv Giuliana A Glock E Gruber O Haas G Hesse M Hofmann J Izvozchikov A Janeschitz G Karger F Keilhacker M Klüber O Lackner K Lenoci M Lisitano G Mast F Mayer HM Meisel D Mertens V Müller ER Münich M Murmann H Niedermeyer H Pietrzyk A Poschenrieder W Rapp H Riedler H Röhr H Ryter F Schmitter KH Schneider F Setzensack C Siller G Smeulders P 《Physical review letters》1986,57(9):1137-1140
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V. V. D’yachenko M. A. Irzak E. N. Tregubova O. N. Shcherbinin 《Technical Physics》2003,48(8):1061-1066
Feasibility of rf plasma heating in the Globus-M spherical tokamak at frequencies several times higher than the ion cyclotron
frequency is considered. Results from a numerical analysis of this problem by using one-and two-dimensional codes are presented.
It is shown that, for the plasma parameters attainable in this device, the single-pass absorption of fast magnetosonic waves
reaches 60%. The energy is released near the plasma axis. The radiation resistance of a one-loop antenna should be close to
1 Ω. The design of an antenna that allows one to match the rf oscillator to the load is described. The parameters of the antenna
resonator required for optimum operation of the antenna are given. 相似文献
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《Physics letters. A》1998,246(6):534-541
The first hollow electron density profile in the central region is measured during the electron cyclotron resonance heating (ECRH) on the JFT-2M tokamak with a TV Thomson scattering system. The density of the peripheral region is not hollow but is accumulated by the pump out from the central region and the gas puffing from outside. The hollowness increases with time but is saturated at ∼ 40 ms and maintains the constant hollow ratio in spite of a slight decrease of temperature. The hollowness is strongly connected with the steep temperature gradient of the heated zone. 相似文献
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为满足 HL-2M 装置高约束模式及高参数实验需求,HL-2M 装置规划 3 条中性束注入(NBI)加热束线,
NBI 加热功率为 15MW。第 1 和第 2 条束线是基于正离子源的 NBI 加热束线,根据中后期高参数实验状态确定第
3 条束线采用正离子源或者负离子源。本文简要介绍了 HL-2M 装置的加热束线布局和系统设计概念,综述了基于
4 套 80kV/45A/5s 离子源的 5MW-NBI 中性束加热束线的设计参数及研制进展。在物理和工程可行性简要分析基
础上,给出了采用 2 套 200kV/12.5A/10s 热阴极负离子源的 2.5MW-NBI 束线的概念设计、工程设计及技术研究进
展。 相似文献
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A. V. Gaponov V. A. Flyagin A. Sh. Fix A. L. Gol'denberg V. I. Khizhnyak A. G. Luchinin G. S. Nusinovich M. I. Petelin Sh. Ye. Tsimring V. G. Usov S. N. Vlasov V. K. Yulpatov 《International Journal of Infrared and Millimeter Waves》1980,1(3):351-372
Conclusion The main problems for the further development of high efficiency powerful gyrotrons are obviously the elaboration of electron guns with a large current density and the ensuring of a stable single-mode operation in resonators with a large cross-section. For the increase in microwave pulse energy (with a pulse length of the order of the time of plasma confinement in large tokamaks) the investigation of the possibilities to diminish heating loads in the resonator and output window of a gyrotron is necessary. 相似文献
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Effect of the parallel electron current on Geodesic Acoustic Modes (GAM) in a tokamak is analyzed by kinetic theory taking into the account the ion Landau damping and diamagnetic drifts. It is shown that the electron current modeled by shifted Maxwell distribution may overcome the phase velocity threshold and ion Landau damping thus resulting in the GAM instability when the parallel electron current velocity is larger than the effective parallel GAM phase velocity Rqω. The instability occurs due to its cross term of the current with the ion diamagnetic drift. Possible applications to tokamak experiments are discussed. 相似文献