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3D Cosmic Ray Muon Tomography from an Underground Tunnel

机译:3D从地下隧道的宇宙射线μ子断层扫描

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摘要

We present an underground cosmic ray muon tomographic experiment imaging 3D density of overburden, part of a joint study with differential gravity. Muon data were acquired at four locations within a tunnel beneath Los Alamos, New Mexico, and used in a 3D tomographic inversion to recover the spatial variation in the overlying rock-air interface, and compared with a priori knowledge of the topography. Densities obtained exhibit good agreement with preliminary results of the gravity modeling, which will be presented elsewhere, and are compatible with values reported in the literature. The modeled rock-air interface matches that obtained from LIDAR within 4 m, our resolution, over much of the model volume. This experiment demonstrates the power of cosmic ray muons to image shallow geological targets using underground detectors, whose development as borehole devices will be an important new direction of passive geophysical imaging.
机译:我们展示了一个地下宇宙射线米声分断层实验成像3D密度覆盖层,部分具有差动重力的联合研究。 在Los Alamos,新墨西哥州的隧道内的四个地点获得了MuOn数据,并用于3D断层变换,以恢复覆盖岩石 - 空中接口的空间变化,并与推进的先验知识进行比较。 获得的密度表现出与重力建模的初步结果表现出良好的一致性,这将在其他地方呈现,并与文献中报告的价值观兼容。 模型的摇滚空气接口与LIDAR在4米内,我们的分辨率超过大部分模型体积的匹配。 该实验展示了宇宙射线μS使用地下探测器的浅地质目标的力量,其开发作为钻孔装置是被动地球物理成像的重要新方向。

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