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电子束发射
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  beam emission
     In order to get the optimum model, the electric field in the gun is calculated, and the process of beam emission is simulated considering the space charge effects.
     通过枪体内电磁场模拟计算、优化电子枪形状、并且在考虑空间电荷效应情况下对电子束发射过程进行模拟,得到了满足设计要求的束斑尺寸。
短句来源
     Breakdown can be avoided in the compact MILO and the symmetry of beam emission can be controlled easily.
     紧凑型MILO结构能避免电击穿,电子束发射的对称性较易控制。
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  “电子束发射”译为未确定词的双语例句
     In this paper we reported a ring-shaped LaB_6 cathode with a large emission area of 115 mm~2.The direct emission current density of the LaB_6 was more than 40 A/cm~2 when the temperature of LaB_6 was 1 873 K.
     介绍了一种用于管状电子束发射的大面积LaB6阴极电子源,其阴极发射面积为115 mm2,LaB6发射体用钼作基底,在LaB6与钼之间用耐高温的碳化物粘合剂填充以防止LaB6与钼发生反应。
短句来源
     (III) Dust charging and levitation in cathode sheath of glow discharges with energetic electron beam.
     (Ⅲ)尘埃粒子在极板有高能电子束发射辉光放电鞘层中的充电与悬浮
短句来源
     The dust charging and levitation in a collisionless cathode sheath of dc glow discharges withenergetic electron beams released from a plane cathode are investigated with a self-consistent theoretic model.
     采用自洽的鞘层模型和尘埃粒子充电模型,我们研究了在极板有高能电子束发射辉光放电鞘层中尘埃粒子的充电与悬浮。
短句来源
     In this case, dust of the same size can levitate at two different positions in the cathode.
     另外还发现:在考虑极板有强电子束发射和尘埃粒子本身的二次电子发射时,同一大小的尘埃粒子能够悬浮在鞘层中两个不同的位置。
短句来源
     The emitting system which consists of LaB_6 cathode,Wehnelt grid and anode is one of pivotal component of X-ray source with micro-beam.
     本文详细的讨论了边界元法在处理微束斑 X射线源的电子束发射系统时 ,L a B6 阴极电子枪内部结构的剖分、计算公式的推导 ;
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  相似匹配句对
     Phosphorus Doping by Cold Emitting Electron Beam
     冷发射电子束掺杂磷
短句来源
     Beam Focusing of Field Emission Arrays
     有电子束聚焦作用的场发射阵列
短句来源
     Launch window
     发射窗口
短句来源
     COLLECTION OF ELECTRON BEAM
     电子束的收集
短句来源
     ELECTRON BEAM CALORIMETERS
     电子束量热计
短句来源
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  beam emission
A one-dimensional model of electron beam emission with a virtual cathode is used to show that spontaneous emission occurs in a reditron while stimulated emission is observed in vircators and negative triodes.
      
Ion-beam emission from a gas field ion source can considerably be improved by employing base tips of spherical instead of paraboloidal geometry.
      
Electron beam emission from the EXOS-B (JIKIKEN) satellite as a powerful diagnostic tool in the magnetosphere
      
Measurements of these waves give information on local plasma density and magnetic field strength and it is revealed that the electron beam emission from the spacecraft is a powerful diagnostic tool in the magnetosphere.
      
Since the Gould Belt pulsars are relatively close by, the selection of EGRET radio-quiet γ-ray pulsars strongly favors large impact angles, β, in the viewing geometry where the off-beam emission from curvature radiation provides the γ-ray flux.
      
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Employing electrolytic trough simulation with method of magnifying progressively, the difficulties in calculating electrical field which were caused by violent change of field in the vici-nity of apex and much more different size between cathode and anode have been overome. The much exact field distribution near real shape cathode was obtained. And the angular bright-ness distribution was also found in this article by calculating. Then, from electron trajectoriesstarting at real tip, a reasonable definition...

Employing electrolytic trough simulation with method of magnifying progressively, the difficulties in calculating electrical field which were caused by violent change of field in the vici-nity of apex and much more different size between cathode and anode have been overome. The much exact field distribution near real shape cathode was obtained. And the angular bright-ness distribution was also found in this article by calculating. Then, from electron trajectoriesstarting at real tip, a reasonable definition of virtual source was presented and the size and po-sition of the virtual source was known.

本文用电解槽模拟,采用逐次放大逼近阴极尖端的方法,克服场发射枪系统阴极附近电场激剧变化及尖端与阳极尺寸上的巨大差异所引起的计算电场的困难,获得实际阴极附近足够精度的电场分布。并由此计算得到沿阴极表面亮度分布。从模拟得到的阴极区域电子轨迹,获得虚源大小及位置与电子束发射角有关的结果。

The principle and method of emittance measurements for pulsed intense electron beams using a multipinhole pin mask is described in the article.The effects of space charge and axial magnitic field on the measurements were considered . The experimental parameters were cathode type , anode mask texture . diode spacing and voltage ,and beam current. A Em (rms value of the emittance) of 79 cm.mrad was obtained with a planar velvet cathode an etched tungsten mask anode at the beam energy (E) of 1.32 MeV and the beam...

The principle and method of emittance measurements for pulsed intense electron beams using a multipinhole pin mask is described in the article.The effects of space charge and axial magnitic field on the measurements were considered . The experimental parameters were cathode type , anode mask texture . diode spacing and voltage ,and beam current. A Em (rms value of the emittance) of 79 cm.mrad was obtained with a planar velvet cathode an etched tungsten mask anode at the beam energy (E) of 1.32 MeV and the beam current (I) of 2kA on the LIA, corresponding normalized brightness (B ) was 4.8 × 10 A (cm.rad ) .

本文描述了利用多孔板测量脉冲强流电子束发射度的原理和方法。考虑了空间电荷和轴向磁场对测量的影响。实验参量是阴极形状、阳极网孔、二极管距离和电压、电流幅值。在直线感应加速器上、用天鹅绒平面阴极和腐蚀的钨网阳极,当束能为1.32MeV、束流为2kA时,测得均方根发射度ε_(rm)=79cm.mrad,相应规一化亮度B_n=4.8×10~3A/(cm.rad)~2。

For a electron beam in a uniform (Waterbag) or Gaussian distribution in the transverse 4-phase space, the measurement principle of the beam emittance with the pepper pot method is studied. The results show that, for the Waterbag beam, the obtained emittance is the edge emittance and the spot sizes for beamlets are different form each other, and that, for the gaussian beam, the RMS emittance, but the spot sizes are equal, not depending on initial positions of the beamlets.

本文探讨了利用多孔板法测量四维横向相空间中均匀分布以及高斯分布的电子束发射度的测量原理。结果表明,对于四维均匀分布的电子束,该法测量的是电子束的边发射度,并且光斑尺寸随着小孔位置不同而变化;对于高斯分布的电子束,该法测量的是电子束的均方根发射度,其光斑尺寸与小孔位置无关。

 
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