KMC-3 XPP
XPP-KMC-3-Beamline
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 future, a four-circle diffractometer setup in a vacuum chamber will allow for sample cooling down to 30 K.
| Beamline data | |
|---|---|
| Segment | H13 |
| Location (Pillar) | 15.1 |
| Source | D13.2 (Dipole) |
| Monochromator | KMC-3 |
| Energy range | 2 - 14 keV |
| Energy resolution | 1/5000 - 1/4000 |
| Flux | 1e11 photons/s |
| Polarisation | horizontal |
| Divergence horizontal | -- mrad |
| Divergence vertical | -- mrad |
| Focus size (hor. x vert.) | 350 µm x 350 µm |
| User endstation | not possible |
| Distance Focus/last valve | mm |
| Height Focus/floor level | 1480 mm mm |
| Beam availability | 24h/d |
| Phone | +49 30 8062 14695 |
| Applicable station(s) | |
| X-Ray Pump Probe (XPP) | 15 - 400 K |
| CryoEXAFS | 5 - 300 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.
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.