Absorption of undulator radiation in media

摘要: Detailed thermal stress analyses of beamline and optical components subject to high heat loads require an Accurate determination the absorbed power profile for accurate prediction temperature structural parameters. This is particularly important beams from wigglers undulators at third generation synchrotron sources because must, in general, be designed maintained with strict mechanical tolerances. The spatial distribution density undulator a rapidly varying function energy photons suggesting that approximative methods based on smooth spectral variation may not valid. In this paper, fast code calculating spectra developed compared wiggler approximation same spectra. Results numerical simulations, including emittance stored particle beam, are presented beryllium window. We find markedly different results two models far off-axis radiation indicating inadequacy model applied spectrum case. overestimates total by as much 82%