用Micromegas覆盖的MediPix2象素CMOS读出电路探测单电子
The detection of single electrons by means of a Micromegas-covered MediPix2 pixel CMOS readout circuit
摘要：
通过MediPix 2读出芯片作为直接阳极读出小漂移室。将Micromegas箔放置在芯片上方50 $μ$处，并且在间隙中发生电子倍增。使用He/Isobutane 80/20混合物，气体倍增因子达到数万，导致检测单个电子的效率优于90%。我们记录了许多帧包含2D图像的宇宙μ子轨道。沿着这些轨迹，观察到电子团簇，以及δ射线。
英文摘要：
A small drift chamber was read out by means of a MediPix2 readout chip as direct anode. A Micromegas foil was placed 50 $μ$m above the chip, and electron multiplication occurred in the gap. With a He/Isobutane 80/20 mixture, gas multiplication factors up to tens of thousands were achieved, resulting in an efficiency for detecting single electrons of better than 90% . We recorded many frames containing 2D images with tracks from cosmic muons. Along these tracks, electron clusters were observed, as well as delta-rays.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
