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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Properties of a cylindrical Penning trap with conical endcap openings
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Properties of a cylindrical Penning trap with conical endcap openings

机译:具有锥形终点开口的圆柱形捏阱的性质

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We describe the results of analytical calculations and numerical simulations of the confinement properties of a mechanically compensated cylindrical Penning trap which has conical endcap openings for large-solid-angle access for example with highly focused laser beams. While the analytical calculations show that under the common geometrical conditions the harmonicity of the confining fields near the centre of the trap does not change when a conical shape of the endcap electrodes is introduced, numerical simulations show significant changes when the opening angle of the cone exceeds a certain critical angle. We also show that these sharp features are due to the fringe-field effects above the critical angle, which are not described by the analytical calculations. These effects are also observed in a cylindrical Penning trap when the length of the endcap electrodes is reduced below a certain critical value.
机译:我们描述了机械补偿圆柱捏阱的限制性的分析计算和数值模拟的结果,其具有例如具有高度聚焦的激光束的大型直角进入的锥形端盖开口。 虽然分析计算表明,在普通的几何条件下,当引入端电极的圆锥形形状时,陷阱中心附近的狭窄区域的谐波不会改变,但是当锥体的开口角度超过时,数值模拟显示出显着的变化 一定的临界角度。 我们还表明,这些尖锐的特征是由于高于临界角度的边缘场效应,这不是由分析计算的描述。 当终端电极的长度降低到低于某个临界值时,还观察到这些效果。

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