共查询到20条相似文献,搜索用时 0 毫秒
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Mamedov N. V. Maslennikov S. P. Presnyakov Yu. K. Solodovnikov A. A. Yurkov D. I. 《Technical Physics》2019,64(9):1290-1297
Technical Physics - We have analyzed the pressure dependences of the discharge and extracted currents for a Penning ion source (PIS) for continuous and pulsed power supplies. We have investigated... 相似文献
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HIRFL-CSR可控硅脉冲二极磁铁电源预研究 总被引:4,自引:0,他引:4
简要介绍了兰州重离子加速器冷却储存环电源系统的概况 ,指出了电源系统建设中的主要难点和设计制作大功率可控硅脉冲电源样机的必要性.并且详细介绍了已经完成的可控硅脉冲电源样机的实施方案、电路原理、关键技术和测试结果等. The pulsed power supply is very important for HIRFL-CSR power supply system. All power supplies in CSRm and CSRe need pulsed operation mode. These power supplies must have high current stability, low current ripple and good dynamic characteristic. A small-scale thyristor rectifier prototype has been researched and designed to find and solve all technique problems of pulsed power supply. The parameters of prototype are the same or higher than dipole po... 相似文献
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Recent work on pulsed cryogenic ion sources at the Tokyo Institute of Technology are reviewed briefly. Surface flashover processes of low-temperature dielectric materials are investigated experimentally in connection with the cryogenic ion sources. Values of dc or pulse breakdown voltage are measured, and fast-frame photographs are taken to observe the luminous surfaces. Characteristics of magnetically insulated cryogenic diodes with externally applied radial fields are clarified as a function of the anode temperature. Hydrogen, nitrogen, or argon ion beam is extracted from each ice on the anode surface of the cryogenic diode. 相似文献
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类金刚石薄膜(DLC膜)的成份(主要指sp^3键和sp^2键)是影响薄膜性能如薄膜的机械特性和电阻特性等的重要因素。因此,研究DLC膜的成份是非常必要的。本文介绍用X射线光电子能谱仪(XPS)测量薄膜成份的方法。通过采用脉冲真空电弧离子源研究在各种工艺条件下镀制的DLC膜,发现了影响DLC膜成份的主要因素。 相似文献
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卫星热设计参数的灵敏度分析 总被引:4,自引:0,他引:4
卫星热设计参数的灵敏度分析为卫星热设计的可靠性验证以及卫星运行可靠性提供了分析方法.利用系统灵敏度理论,对卫星热设计问题进行了分析,导出了卫星热设计系统的灵敏度方程.并以太阳能电池板的热设计为例,对系统的灵敏度方程进行了求解,分析了各参数的灵敏度,为卫星热设计中结构及物性参数的确定提供了依据。 相似文献
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Vinogradov A. V. Pepelyshev Yu. N. Rogov A. D. Sidorkin S. F. 《Physics of Particles and Nuclei Letters》2019,16(6):952-966
Physics of Particles and Nuclei Letters - Parameters of the optimum alternative of a high-flux pulsed neutron source (fourth-generation neutron source in Dubna), which is foreseen to replace the... 相似文献
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北京正负电子对撞机重大改造工程(BEPCⅡ)采用的是新型冲击磁铁Slotted Pipe Kicker, 其结构上要求双极性供电. 平衡变压器是实现双极性的关键部件, 是解决脉冲源闸流管阴极可直接接地的绝好技术途径. 平衡变压器是一种具有特殊用途的高压快脉冲变压器, 因此其设计除了要解决高压快脉冲变压器的一般性技术问题外, 还必须着重考虑电流平衡度指标. 通过理论分析、模拟计算和测试实验证明不平衡电流主要由变压器的励磁电流和磁芯涡流损耗等效电流两部分组成. 平衡变压器磁芯材料和几何尺寸选取, 以及原副边导体结构设计是
实现设计指标的关键所在. 样机测试结果与设计计算结果相符, 验证了平衡变压器设计理论的正确性, 且平衡度D<1%达到预定指标. 相似文献
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HUANG Feng LOU Qihong 《Chinese Journal of Lasers》1999,8(1):15-20
1IntroductionExcimerlasersarethepulsedgaslaserwhichoperateatanumberoffixedwavelengthsintheregionofultraviolet.However,itspuls... 相似文献
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S. N. Antonov 《Optics and Spectroscopy》2018,125(3):398-401
A method of the power summation for mutually noncoherent pulsed lasers of the same type using time interleaving is proposed and validated experimentally. The method uses an acoustic-optic deflector, which commutates radiation of different sources into one output channel simultaneously with radiation presenting in this channel. It is crucially important that the power of the final output radiation is equal to the power sum of the input sources, and the angular and coordinate parameters of an output beam are the same as that for the input sources. The experiments were carried out with single-mode diode lasers on a wavelength of 1.3 μm using a ТеО2-crystal-based deflector. The method is appropriate for the power summation for fiber-optic, diode, and solid-state lasers. We have estimated the main interrelated parameters. 相似文献
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为了在HL-2A上实现3MW的中性束注入,我院自主研制了直径为260ram,高度为240ram的大功率多磁极会切场离子源.目前,它的性能已达到并超过了最初设计指标,放电脉冲为ls时,最大离子流密度为0.44A/cm2;放电脉冲为3s时,等离子体离子流密度0.24A/cin2;等离子体非均匀性都在5%-7%范围之内.目?它是我国国内等离子体密度最高,放电功率最大的长脉冲桶式离子源.本文通过实验数据与理论相结合的方式对弧放电特性进行分析. 相似文献
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大功率多磁极会切场离子源的弧放电特性分析 总被引:1,自引:0,他引:1
为了在HL-2A上实现3MW的中性束注入, 我院自主研制了直径为260mm, 高度为240mm的大功率多磁极会切场离子源. 目前, 它的性能已达到并超过了最初设计指标, 放电脉冲为1s时, 最大离子流密度为0.44A/cm2; 放电脉冲为3s时, 等离子体离子流密度0.24A/cm2; 等离子体非均匀性都在5%—7%范围之内. 目前, 它是我国国内等离子体密度最高, 放电功率最大的长脉冲桶式离子源. 本文通过实验数据与理论相结合的方式对弧放电特性进行分析. 相似文献
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In this paper we present the physical design of the pulsed sextupole injection system for Beijing Advanced Photon Source (BAPS) with an ultralow emittance. The BAPS ring lattice is designed in such a way that two options of pulsed sextupole injection are allowed, i.e., with septum and pulsed sextupole in different drift spaces or in the same drift space. We give the magnetic parameters of the injection system and the optimal condition of the optical flmctions for both options. In addition, we find that the pulsed sextupole induces position-dependent dispersive effect and causes a non-ignorable effect on the injection efficiency in a storage ring with a relatively small acceptance, which should be well considered. 相似文献
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In this paper we present the physical design of the pulsed sextupole injection system for Beijing Advanced Photon Source (BAPS) with an ultralow emittance. The BAPS ring lattice is designed in such a way that two options of pulsed sextupole injection are allowed,i.e.,with septum and pulsed sextupole in different drift spaces or in the same drift space. We give the magnetic parameters of the injection system and the optimal condition of the optical functions for both options. In addition,we find that the pulsed sextupole induces position-dependent dispersive effect and causes a non-ignorable effect on the injection efficiency in a storage ring with a relatively small acceptance,which should be well considered. 相似文献
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Magnetostatic self and interaction energies can be computed via demagnetization factors whenever the magnetic state is close to a uniform state, e.g. in the presence of a strong applied field, or when the dimensions involved are within the single-domain limit. We derive analytical expressions for the demagnetization factors of cylindrical shells and rings with rectangular and square cross-sections. The factors are given either as a combination of elliptic integrals or as a series expansion in powers of the dimensionless ratio between inner and outer radii. Limiting cases are analysed for particular ranges of the shape parameters. We also investigate the ring with a square cross-section, and the elliptic ring, where analytical expressions are provided only for small eccentricity. Finally, we introduce the dipolar coupling integral encoding magnetostatic interactions between a magnetized cylinder and a thin coating on its lateral surface. 相似文献
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Minimization of energy consumed in plasma generation is critical for applications, in which a large volume of plasmas is needed. We suggest that a high electron density atmospheric pressure plasmas can be generated by pulsed discharges in potassium seeded argon at an elevated temperature with a very small power input. The ionization efficiency and power budget of pulsed discharges in such plasmas are analytically studied. The results show that ionization efficiency of argon, especially at small reduced electric field E/N (the ratio of the electric field to the gas number density), is improved effectively in the presence of small amount of potassium additives. Power input of pulsed discharge to sustain a prescribed average level of ionization in potassium seeded argon is three orders of magnitude lower than that in pure argon. Further, unlike in pure argon, it is found that very short high-voltage pulses with very high repetition rates are unnecessary in potassium seeded argon. A pulse with lOOns of pulse duration, 5kHz of repetition rate, and 2Td (1 Td = 1 × 10^-21 Vm^2) of E/N is enough to sustain an electron density of 10^19 m^-3 in 1 arm 1500K Ar+0.1% K mixture, with a very small power input of about 0.08 × 10^4 W/m^3. 相似文献