학술논문
Dynamic vacuum analysis for APS high heat flux beamline front ends using optical ray-tracing simulation methods
Document Type
Conference
Author
Source
Conference: Conference on physics and engineering of advanced detectors and collection/focusing systems,San Diego, CA (United States),19-24 Jul 1992; Other Information: PBD: [1992]
Subject
Language
English
Abstract
The high-power and high-flux x-ray beams produced by third generation synchrotron radiation sources such as the Advanced Photon Source (APS) can cause significantly high gas desorption rates on beamline front-end components if beam missteering occurs. The effect of this gas desorption needs to be understood for dynamic vacuum analysis. To simulate beam missteering conditions, optical ray-tracing methods have been employed. The results of the ray-tracing analysis have been entered into a system-oriented vacuum program to provide dynamic vacuum calculations for determination of pumping requirements for the beamline front-ends. The APS will provide several types of synchrotron radiation sources, for example, undulators, wigglers, and bending magnets. For the purpose of this study, the wiggler source was chosen as a ``worst case`` scenario due to its high photon flux, high beam power, and relatively large beam cross section.