The Columbia University Sub-micron Charged Particle Beam.

The Columbia University Sub-micron Charged Particle Beam.
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DOI:
10.1016/j.nima.2009.08.041
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发表时间:
2009-10-11
影响因子:
1.4
通讯作者:
Brenner, David J.
Brenner, David J.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Randers-Pehrson, Gerhard;Johnson, Gary W.;Marino, Stephen A.;Xu, Yanping;Dymnikov, Alexander D.;Brenner, David J.

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哥伦比亚大学放射研究加速器设施(RARAF)设计并构建了由两个静电四极三联体组成的透镜系统。该透镜系统用于将 6 MeV 4He 离子聚焦到空气中直径为 0.8 µm 的束斑。四极电极可承受足够高的电压,可聚焦高达 10 MeV 的 4He 离子和高达 5 MeV 的质子。四极杆三联体设计的新颖之处在于,通过精确的构造进行对准,并且四极杆的相对强度通过元件的长度来实现,因此聚焦所需的电压的大小几乎相同。电极之间的绝缘部分经过离子注入,提高了透镜的电压稳定性。镜头设计采用俄罗斯对称的四极元件。
A lens system consisting of two electrostatic quadrupole triplets has been designed and constructed at the Radiological Research Accelerator Facility (RARAF) of Columbia University. The lens system has been used to focus 6-MeV 4He ions to a beam spot in air with a diameter of 0.8 µm. The quadrupole electrodes can withstand voltages high enough to focus 4He ions up to 10 MeV and protons up to 5 MeV. The quadrupole triplet design is novel in that alignment is made through precise construction and the relative strengths of the quadrupoles are accomplished by the lengths of the elements, so that the magnitudes of the voltages required for focusing are nearly identical. The insulating sections between electrodes have had ion implantation to improve the voltage stability of the lens. The lens design employs Russian symmetry for the quadrupole elements.
影响因子: 1.4
作者:
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