共查询到20条相似文献,搜索用时 78 毫秒
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多功能腔集真空泵安装、束流过渡漂移、束流在线测量及方便机器检修等诸多功能于一体,是“神龙一号”加速器束流传输系统的一个关键部件。简要介绍了多功能腔设计中的磁轴准直、输运磁场的连续性以及横向阻抗几个关键问题,阐明了多功能腔的可维修特性和磁轴准直性能,分析了多功能腔对输运磁场连续性的影响,计算了多功能腔的低横向耦合阻抗,并提出了降低横向耦合阻抗的措施。多功能腔的应用简化了束流传输线的结构,提高了束流传输线的性能,将在“神龙一号”直线感应加速器的调试中起到非常重要的作用。 相似文献
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直线感应加速器加速间隙对发射度的影响 总被引:1,自引:1,他引:0
文中用解析方法计算了直线感应加速器加速间隙对发射度的影响。考虑了存在轴向引导磁场,加速电场,束流分裂以及多个加速间隙的作用。这种解析方法也适用于射频直线加速器的情形。 相似文献
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直线感应加速器(LIA)是产生强流、高能电子束的重要装置之一。现有的直线感应加速器均以单次方式工作,加压一次只能加速一个束流脉冲打靶,而实际应用常希望其能工作在高重复频率的猝发多脉冲模式下。对原单脉冲LIA进行猝发双脉冲改造,无疑是获得多脉冲LIA最经济最简单的方法。 相似文献
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Rutkowski H.L. Hewett D.W. Humphries S. Jr. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1991,19(5):782-789
An overview of the development of arc ion sources for heavy ion fusion is presented. Two approaches to heavy ion fusion (HIF)-the RF linac-storage ring approach and the induction linac approach-are described. RF linac schemes require low emittance and moderate current levels, because the beam is accumulated in storage rings before being focused on target. The induction linac approach requires low emittance and high current, because this is a single-pass approach to HIF and one wishes to limit the number of beams in the machine. The RF scheme generally uses long pulse sources together with a buncher of RFQ. The induction linac approach requires sources in the microsecond pulse length range, with good optics being maintained during the pulse. Emphasis is on the induction linac approach pursued at the Lawrence Berkeley Laboratory 相似文献
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裴士伦 池云龙 王书鸿 裴国玺 周祖圣 侯汨 Mykola Ayzatskiy Ivan Karnaukhov Volodymyr Kushnir Viktor Mytrochenko Andrey Zelinsky 《中国物理 C》2012,36(7):653-660
We designed a 100 MeV/100 kW electron linear accelerator for NSC KIPT, which will be used to drive a neutron source on the basis of subcritical assembly. Beam dynamics studies have been conducted to reach the design requirements (E=100 MeV, P=100 kW, dE/E<1% for 99% particles). In this paper, we will present the progress of the design and the dynamic simulation results. For high intensity and long beam pulse linear accelerators, the BBU effect is one big issue; special care has been taken in the accelerating structure design. To satisfy the energy spread requirement at the linac exit, the particles with large energy difference from the synchronous particle should be eliminated at a low energy stage to ease the design of the collimation system and radiation shielding. A dispersion free chicane with 4 bending magnets is introduced downstream of the 1st accelerating section; the unwanted particles will be collimated there. 相似文献
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V. D. Selemir A. E. Dubinov B. G. Ptitsyn A. A. Evseenko I. A. Efimova V. A. Letyagin R. K. Nurgaliev N. V. Stepanov K. S. Shilin A. V. Yachnyi 《Technical Physics》2004,49(5):642-646
A high-power microwave oscillator (vircator) is built around an ironless induction linac. The feature of this device is ballistic
focusing of an electron beam in a diode-type system with a concentric spherical cathode and anode. The possibility of the
vircator to generate high-power microwave pulses is demonstrated. 相似文献
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Roy R. Shanker O. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1994,22(6):997-1001
The charge-density integral method is used to analyse a triode gun which will inject electrons into a standing wave electron linac. The effect of space charge on the gun output beam parameters is estimated. The beam dynamics of the entire linac system is studied. The energy spectrum, beam size and divergence at the end of the linac are evaluated neglecting space charge 相似文献
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中国加速器驱动次临界系统(C-ADS)计划采用一个平均流强为10 mA的连续波质子加速器作为次临界堆的驱动器,驱动加速器的束流功率为15 MW,最终能量1.5 GeV,其中主加速器是驱动加速器的一个重要部分,完成束流能量从10 MeV到1.5 GeV的加速,所有加速腔均采用超导结构。为了避免频繁束流中断对反应堆的损坏,设计要求驱动加速器在运行过程中束流可以中断的次数非常有限,因此加速器在设计过程植入了容错机制,尝试了各种可能的方法以最大程度地满足C-ADS加速器的高可靠性和稳定性的要求。介绍了C-ADS主加速器的基本设计: 总长度306.4 m, 束流的归一化RMS发射度增长控制在5%以内。总结了各个重要参数选择过程中的考虑以及整个加速段多粒子跟踪模拟的束流动力学结果。 相似文献
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准周期聚焦–加速耦合系统的均温设计方法 总被引:1,自引:0,他引:1
强流质子直线加速器要求严格控制束流损失和束流发射度增长.理论已经证明,强的空间电荷作用在不同自由度之间的耦合,会因为其间的温度差异,通过束流的相干不稳定性,使束流发射度增长.因此,有必要按照均温的原则设计强流加速器.但是,由于质子直线加速器的各种加速结构均为准周期耦合系统,使得均温设计十分繁琐而难以达到完全均温.我们利用国际上通用的束流动力学软件TRACE3-D,给它补充了均温设计功能,通过与PARMILA程序的配合使用,可以方便地在加速器设计中实现均温条件.本文将介绍我们对TRACE3-D的修改补充,并以强流质子直线加速器设计实例,说明均温设计的必要性. 相似文献
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《中国物理C(英文版)》2015,(5)
The ADS(Accelerator Driven subcritical System) driver linac in China is designed to run in CW(Continuous Wave) mode with 10 m A designed beam current. In this scenario, the beam-induced parasitic modes in the ADS driver linac may make the beam unstable or deteriorate the beam performance. To evaluate the parasitic mode effect on the beam dynamics systematically, simulation studies using the ROOT-based numerical code SMD have been conducted. The longitudinal beam instability induced by the HOMs(High Order Modes) and SOMs(Same Order Modes) has little effect on the longitudinal beam performance for the current ADS driver linac design based on the 10 Me V/325 MHz injector I from previous studies. Here the transverse parasitic mode(i.e., dipole HOM)effect on the transverse beam performance at the ADS driver linac exit is investigated. To more reasonably quantify the dipole mode effect, the multi-bunch effective emittance is introduced in this paper. 相似文献