Beamline description

Experimental station

  • “Exit slits” to define the beam before the first ionization chamber I0.
  • Three ionization chambers by Oxford Instruments for measurements in transmission mode. These are filled with optimal He, N2, Ar, Kr gas mixture at a total pressure of 2 bars and are operated at a field of 2 kV per 30 cm of length. The ionization chambers signals are amplified by Keithley picoamperomers and the digitalized by a voltage to frequency converters and finally read by the counters of the data collection PC.
  • A multi-sample holder with movement on vertical axis
  • A removable motorized table (1.5 x 1 m) with horizontal and vertical movements is placed between the first two ion chambers. The top of this table is about 80 cm below the beam and all this space is available for users' experimental apparatus.
  • A total electron yield detector to collect x-ray absorption fine structure spectra at l-N2 and room temperature
  • A silicon drift detector for measurements in fluorescence mode is available

Sample environments

  • Liquid-N2 cryostat. This device allows measurements at fixed temperature of 80 K, both in transmission and fluorescence mode.
  • L’Aquila-Camerino furnace for high temperature measurements. The furnace operates under high vacuum conditions in a wide range of temperatures 300-2500 K, measured by means of a thermocouple or by a pyrometric probe. The furnace can be used only for transmission mode measurements and is controlled remotely by the beamline control system allowing for temperature cycles with continuous collection of the temperature.
  • SPECAC cell for liquid samples. Aqueous and non aggressive solutions can be measured in transmission mode. The maximum loading volume of solution is 7 ml and optical tunable pathlength ranges from 0.1 to 6 mm.

Acquisition modes

  • Transmission
  • Fluorescence
  • Total electron yield
Last Updated on Thursday, 28 November 2019 12:30