球形GEM，用于无缺陷探测器
Spherical GEMs for parallax-free detectors
摘要：
我们开发了一种方法，使GEM箔的球形几何形状。本程序的测试和所得到的球形\textsc{gem}。与球形漂移电极一起，可以形成球形转换间隙。当使用气体转换器时，这将消除用于检测X射线、中子或UV光子的视差误差。这种视差误差限制了宽散射角下的空间分辨率。该方法对于设计中可能的变化是廉价和灵活的。我们展示了先进的计划，使一个完全球形的三重GEM探测器，包括球形读出结构的原型。该探测器将具有优异的位置分辨率，在广角下也是如此，并且具有高速率能力。以前从未制造过完全球形的气体探测器。
英文摘要：
We developed a method to make GEM foils with a spherical geometry. Tests of this procedure and with the resulting spherical \textsc{gem}s are presented. Together with a spherical drift electrode, a spherical conversion gap can be formed. This would eliminate the parallax error for detection of x-rays, neutrons or UV photons when a gaseous converter is used. This parallax error limits the spatial resolution at wide scattering angles. The method is inexpensive and flexible towards possible changes in the design. We show advanced plans to make a prototype of an entirely spherical triple-GEM detector, including a spherical readout structure. This detector will have a superior position resolution, also at wide angles, and a high rate capability. A completely spherical gaseous detector has never been made before.
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