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Beamline description

The X-Ray Fluorescence beamline is a multipurpose instrument run under the joint supervision of Elettra and IAEA.

The beamline is built downstream of a bending magnet, section 10.1 of Elettra storage ring and it is devoted to spectrometry, spectroscopy, microscopy, and reflectometry.
A wide energy range (2-14 keV) is accessible thanks to a double crystal monochromator of resolving power 1.4 10-4. The source is re-imaged to a 450 x 300 μm beamsize (hor x ver) at exit slits (~ 23 m from the source), with an angular divergence of 0.15 mrad and a transmitted flux of about 5 109 ph/s (at 5500 eV, machine mode 2GeV).

The sample environment is an Ultra-High-Vacuum Chamber, project of the IAEA, based on a prototype designed and built by the PTB and TU Berlin, Germany.

The general layout of the beamline is the following:

End Station

The IAEAXspe end station includes the following components:
  1. Main and load-lock ultra-high vacuum (UHV) chambers with a sample holder transfer mechanism;
  2. A base system including three motorized stages for the alignment of the chamber with respect to the SR beam;
  3. A seven-axis motorized manipulator controlled by a Stepping Motor Controller (SMC) for positioning the sample and the detectors regarding the synchrotron beam direction, with thermocouples to prevent overheating of the motors and different types of sample holders;
  4. Two Silicon Drift Detectors (SDDs) for XRF and one for XRR measurements;
  5. Several GaAs and Si photodiodes of various thicknesses as X-ray monitoring detectors connected to a picoammeter;
  6. Two video cameras for inspecting a large (macro-camera) and small (micro-camera) field of view on the sample surface;
  7. UHV pumping system composed of turbomolecular and rotation pumps, vacuum gauges, gate valves controlled by a Gate Valve Controller (GVC);
  8. A Tango-based command and data acquisition server coupled with a user-friendly Graphical User Interface to operate the instruments.
Some of the instruments are shown in the schematic diagrams below:

External (left) and internal (right) view of the IAEAXspe end station components.
(schematic drawings prepared by PTB, Berlin)

The IAEAXspe end station installed at the XRF beamline of the Elettra Sincrotrone Trieste

Last Updated on Wednesday, 31 July 2019 12:16