The XPP/KMC-3 is a hard x-ray beamline dedicated to time-resolved x-ray diffraction and absorption spectroscopy experiments (EXAFS, XANES). It is equipped with an x-ray mirror assembly and a double monochromator, which can be removed from the x-ray beam path to allow for experiments with a monochromatic or a white x-ray beam. The energy range extends from 2 keV to 14 keV. In addition, the beamline comprises an ultrafast laser as a pump source for time-resolved experiments. In the near furture, a four-circle diffractometer setup in a vacuum chamber will allow for sample cooling down to 30°K.

Typical applications of the beamline are:

  • Time-resolved x-ray diffraction in solids and soft matter
  • Debey-Scherrer and Laue diffraction
  • Extended X-ray Absorption Fine Structure spectroscopy and X-ray Absorption Near Edge Spectroscopy ( (EXAFS, XANES)

Currently the beamline is only equipped for time-resolved x-ray diffraction experiments. If you wish to submit a proposal please contact the beamline scientist in advance to discuss the feasibility of your experiment.

Layout-plan of the XPP/KMC-3 Beamline

Layout-plan of the XPP/KMC-3 Beamline

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Beamline data
Segment H13
Location (Pillar) 15.1
Source D13.2
Monochromator KMC-3
Energy range 2 - 14 keV
Energy resolution 1/1000 - 1/5000
Flux 1e11 photons/s
Polarisation horizontal
Divergence horizontal mrad
Divergence vertical mrad
Focus size (hor. x vert.) 350 µm x 350 µm
Distance Focus/last valve mm
Height Focus/floor level 1480 mm mm
Free photon beam available
Fixed end station nein
Beam available 24h/d
Phone +49 30 8062 14695

Our laser in the Optics Hutch is a multi-stage Yt-doped oscillator - amplifier system (Impulse, Clark-MXR). It is synchronized to the RF-signal of the storage ring with an accuracy better than 5 ps. The main laser parameters are:

  • pulse energy = 10 µJ
  • pulse duration = 250 fs
  • center wavelength = 1030 nm
  • repetition rate = 200 kHz - 1.25 MHz (adjustable)

For time-resolved experiments, the laser is coupled to the experimental hutch via a chicane. The optics hutch provides several nonlinear wavelentgh conversion setups, e.g., NOPA, SHG and DFG.