[en] Mn core-level spectra of Mn/Au(001) and Mn/Pt(001) systems are investigated by using X-ray photoemission spectroscopy. For the Mn/Au(001) system, large satellite structures which are very similar to those found previously in Mn/Cu(001) and Mn/Ag(001) systems, are also observed in the Mn 2p core level spectra. On the other hand, such large satellite structures are not observed in the case of the Mn/Pt(001) system. Considering the results of the structural analysis, these results indicate that the large satellite effect observed in Mn thin film systems is mainly related to the hybridization of Mn d electrons with the substrate, not to the effect of low-dimensionality as claimed in previous reports.

[en] In the third generation light source, photon beam position stability is critical issue on user experiment. Generally photon beam position monitors have been developed for the detection of the real photon beam position and the position is controlled by feedback system in order to keep the reference photon beam position. In the PLS-II, photon beam position stability for front end of particular beam line, in which photon beam position monitor is installed, has been obtained less than rms 1μm for user service period. Nevertheless, detail analysis for photon beam position data in order to demonstrate the performance of photon beam position monitor is necessary, since it can be suffers from various unknown noises. (for instance, a back ground contamination due to upstream or downstream dipole radiation, undulator gap dependence, etc.) In this paper, we will describe the start to end study for photon beam position stability and the Singular Value Decomposition (SVD) analysis to demonstrate the reliability on photon beam position data.