Beamline I511 at MAX-lab, Lund, SwedenBeamline I511 is an undulator based soft X-ray beamline aimed at high resolution High Pressure X-ray Photoelectron Spectroscopy (HP-XPS), X-ray Absorption Spectroscopy (XAS), and X-ray Emission Spectroscopy (XES - available only at the bulk endstation). The insertion device provides horizontally polarized light in an energy range from 50 eV to ~1500 eV. The beamline serves two end stations utilizing a common modified SX-700 monochromator. A flip-mirror placed after the exit slit directs the radiation alternately into these two stations. The analysis chamber of both end stations can be rotated around the incoming beam axis allowing to choose the direction of detection freely in the plane perpendicular to the beam axis. A description of the common part of the beamline can be found here. There exists a participating research team (PRT) at the beamline. Members of the PRT are the Division of Molecular and Condensed Matter Physics at Uppsala University, the Division of Synchrotron Radiation Research at Lund University, and the Division of Materials Physics at the Royal Institute of Technology in Stockholm. Beamtime is available to external users, who may apply to the peer-review-based selection procedure of MAX-lab's Program Advisory Committee. | |||||
HP-XPS endstation (I511-1)The HP-XPS has been installed in January 2011 and is under comissioning now until summer 2011. If you are interested in applying for beamtime at the I511-branchline in the period 2011-2012, please contact
to discuss the feasibility of your project and conditions of beamtime BEFORE you submit the proposal. |
The HP-XPS end station (I511-1), which was built in collaboration between the Division of Synchrotron Radiation Research, Lund University, Division of Molecular and Condensed Matter Physics, Uppsala University, and MAX-lab is used for measurements on clean surfaces and surface adsorbates under near-ambient pressure conditions. For that purpose the endstation is equipped with a SPECS Phoibos 150 NAP analyzer. Experiments at pressures up to some mbar are carried out using a dedicated high pressure cell, which can be moved in and out of the analysis UHV chamber. Gases are supplied to the high pressure cell through a gas system with gas cleaning facilities and flow control. There exist altogether three gas lines plus an Argon gas line. The gases from the three gas lines can be mixed prior to entry into the high pressure gas. Default gases are oxygen and carbon monoxide. Other gases and vapours, including water, can be mounted on request after a safety evaluation. X-ray absorption spectroscopy can be carried out in Auger yield mode. (HP-XPS continues here.)
Bulk endstation (I511-3)
The bulk end-station was built by the Soft X-ray group at the Physics Department of Uppsala University, and comprises a soft X-ray emission spectrometer (Scienta XES-350) for soft X-ray emission spectroscopy studies of non-UHV compatible systems. X-ray absorption may be measured by electron yield either using the sample current and photon yield using the on-site total yield detector.
The analysis chamber spectrometer can be rotated around the synchrotron beam, not only facilitating photon-in-photon-out experiments with high energy-resolution for both incoming and outgoing photons, but also the study the angular dependence of soft X-ray scattering process. A pinhole separates the analysis chamber from the beam line allowing relaxation of UHV conditions. All in situ preparations are to be performed in the preparation chamber which is located next to the analysis chamber. (Bulk endstation continues here.)
