The scanning electron microscope (SEM) has been successfully used as an analysis tool for micro scale materials in the last few decades [1]. Recently, the large chamber (LC) SEM at Y-12 has demonstrated useful results in the analysis of large specimens at nano scales. This paper summarizes the research efforts conducted by UT and Y-12 in applying state of art 3D computer vision techniques to LC...

A rotatable collimator is proposed for the LHC phase II collimation upgrade. When the beam crosses the collimator, it will excite trapped modes that can contribute to the beam energy loss and power dissipation on the vacuum chamber wall. Transverse trapped modes can also generate transverse kicks on the beam and may thus affect the beam quality. In this paper, the parallel eigensolver code Omeg...

source file. This near-field source is then imported into a second simulation of the anechoic chamber, using a much coarser mesh. According to Huygens’ Principle, the second simulation will create the same radiated emissions as the full 3D model, and it only requires a few minutes. The same approach can be used for modeling other structures which can affect emissions, such as the housing of a PCB.

Abstract Planar electromagnetic correction lenses were designed, constructed, and installed in order to compensate skew multipole components generated by an electromagnetic circularly polarizing undulator (CPU) for the Advanced Photon Source (APS). The reason for selection of the planar configuration is that the corrector lenses should fit around a flat undulator vacuum chamber. Comparison was ...

Introduction: Dental Cone beam CT (CBCT) is an imaging modality which has emerged as a 3D imaging modality of choice for osseous structures in the maxillofacial region. With increased usage of CBCT imaging for diagnosis and treatment planning, it is imperative that stringent dose assessments must be performed for dose estimation to safeguard both the patients and operating staf...