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Statics are a concern on most seismic surveys and the key to addressing the statics problem is accurate estimations of near-surface velocity variability. Near-surface variabilities in weathered or subweathered layers can cause trace-to-trace time irregularities that adversely affect the ultimate quality and therefore useability of a CMP stacked section. In(More)
In this work we present a preliminary study of a long chain of cavities and some aspects involved in the optimization procedure. It is important to numerically model and optimize the SRF cavities with respect to external quality factors of the most dangerous higher order modes. BESSYVSR is an upgrade scheme for the existing BESSY II storage ring aiming to(More)
The Berlin Energy Recovery Linac Project (bERLinPro) is designed to develop and demonstrate CWLINAC technology for 100-mA-class ERLs. High-current operation requires an effective damping of higher-order modes (HOMs) of the 1.3 GHz main-linac cavities. We have studied elliptical 7-cell cavities based on a modified Cornell ERL design combined with JLab’s(More)
Statics are a dynamic problem that affects most seismic surveys. The key to addressing the statics problem is an accurate estimation of near-surface velocity variability. Reflection velocity analysis is critical to meaningful CMP stacks, however a reliable velocity function depends on reflections with the trace-to-trace static variability associated with an(More)
A 30 m by 30 m two-dimensional grid was designed on a flat bench behind a quarry face of predominantly limestone with thin shale layers located at a Bonner Springs, Kansas site to test the utility of ground-penetrating radar (GPR) for stratigraphic studies. GPR data were collected along seven lines parallel to the quarry face and seven lines perpendicular(More)
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