Beamline I411 - Short information
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Beamline I411 is based on an upgraded version of the monochromator and end-station previously used at beamline 51 at MAX I. The beamline has an undulator source and covers the photon energy range 50 eV to about 1500 eV. The end-station has the unique versatility of being able to handle both solid, liquid and gaseous samples. Thus the beamline is well suited for high resolution electron spectroscopy on free atoms and molecules as well as for studies of liquid and solid surfaces. There are also possibilities to add other types of detectors, e.g. for electron-ion coincidence measurements.
Contact persons:
Maxim Tchaplyguine, beamline manager
Svante Svensson, Uppsala University
References:
M. Bässler, A. Ausmees, M. Jurvansuu, R. Feifel, J.-O. Forsell, P. de Tarso Fonseca, A. Kivimäki, S. Sundin, S.L. Sorensen, R. Nyholm, O. Björneholm, S. Aksela and S. Svensson, Beam Line I411 at MAX II - Performance and First Results, Nucl. Instr. and Meth. in Phys. Res. A 469, 382, 2001.
M. Bassler, J.-O. Forsell, O. Bjorneholm, R. Feifel, M. Jurvansuu, S. Aksela, S. Sundin, S.L. Sorensen, R. Nyholm, A. Ausmees and S. Svensson, Soft X-Ray Undulator Beam Line I411 at MAX-II for Gases, Liquids and Solid Samples, J. Electron Spectrosc. Relat. Phenom., 101-103, 953, 1999.
Technical data:
| Source |
Undulator, period = 59 mm, 43 periods, Kmax = 3.6. |
| Pre-focusing optics |
Horizontally focusing spherical mirror. |
| Monochromator |
Modified SX-700 with 1220 l/mm grating and a plane-elliptical focusing mirror. |
| Energy range |
40 - ~1500 eV. |
| Energy resolution |
E/dE = 103 - 104. |
| Re-focusing optics |
Toroidal mirror. |
| Photon flux on sample |
1011 - 1013 ph/s. |
| Experimental station |
The system consists of separate analyzer and preparation chambers accessible via a long-travel manipulator. The analyzer chamber is equipped with a hemispherical electron energy analyzer (SCIENTA) which can be rotated around the incoming beam for polarization dependent measurements. The analyzer chamber is designed for measurements on both gaseous, liquid and solid samples.
In front of the experimental station a one meter long section of the beamline can host other types of detectors for atomic and molecular spectroscopy, e.g. ion-electron coincidence measurements.
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