01836nas a2200169   4500008004100000022001400041245019100055210006900246260007100315300001400386490000800400520106600408100001501474700001801489700003001507856012901537       2013                        eng d  a1932-744700aDesign and performance aspects of a custom-built ambient pressure photoelectron spectrometer toward bridging the pressure gap: oxidation of Cu, Ag, and Au surfaces at 1 mbar O-2 pressure0 aDesign and performance aspects of a custombuilt ambient pressure  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAR  a4717-47260 v1173 a<p>The critical features of a custom-built laboratory version ambient pressure photoelectron spectrometer (Lab-APPES) are presented. A double front cone differential pumping arrangement and an aperture free design employed in the electrostatic lens regime improve the data collection and data quality. In contrast to the conventional X-ray photoelectron spectrometers (XPS) operating at ultrahigh vacuum (UHV), it is possible to explore the electronic structure of solid surfaces under working conditions or closer to working conditions with Lab-APPES. Especially surface-dependent phenomena can be explored up to 1 mbar pressure and up to 873 K by conventional heating methods and at least up to 1273 K by a laser heating method. Simultaneous XPS and reaction kinetic measurements on solid surfaces make the Lab-APPES an important tool to measure the dynamic electronic structure changes on material surfaces under reaction conditions. The interaction of O-2 with polycrystalline foils of Cu, Ag, and Au from UHV to 1 mbar and up to 773 K has been studied.</p>1 aRoy, Kanak1 aVinod, C., P.1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/design-and-performance-aspects-custom-built-ambient-pressure-photoelectron-spectrometer-0