P66 Time-resolved luminescence spectroscopy

P66 is under construction

Experiment for VUV luminescence and reflection Spectroscopy


The P66 station will be operated in the UV- VUV spectral region with pulsed synchrotron excitation in nanosecond range.

The central features of this beamline are its very large horizontal acceptance. The entrance optics consists of two mirrors for separate vertical and horizontal focusing.
The first, cylindrical mirror is located at a distance of 10.8 m from the source and accepts 12 mrad of the horizontal divergence. This gives a 3 mm wide image at the entrance slit of the monochromator.
The second (M2), plane elliptic mirror focuses the 2.2 mrad vertical divergence to 0.1 mm at the entrance slit of the monochromator. Both mirrors can be aligned by remote control.

Primary 2 m normal incidence monochromator in 15° Mc Pherson mounting covers the working UV and VUV spectral range from 3.7 eV to 40 eV. The monochromator is equipped with two holographic concave gratings (1200 groves/mm), which can be interchanged in situ. These gratings are optimized for different wavelength ranges by Pt and Al+MgF2 coatings.
The resolution interval range is between 0.02 nm and 0.3 nm. One can choose between three different fixed entrance slits of 0.03, 0.1 and 0.5 mm in width. With appropriate exit slit, this corresponds to a resolution of 0.02 nm, 0.05 nm and 0.32 nm, respectively.


  • VUV-fluorescence spectroscopy
  • Photon-stimulated desorption
  • Time- resolved spectroscopy

P66 will be mostly dedicated to time resolved luminescence spectroscopy experiments.
It will be located on top of the PETRA III tunnel between of the FLASH Hall "Kai Siegbahn" and PETRA III Hall "Max von Laue" .