  The European X-ray Free Electron Laser (XFEL.EU) will provide unprecedented
peak brilliance and ultra-short and spatially coherent X-ray pulses in an
energy range of 0.25 to 25 keV . The pulse timing structure is unique with a
burst of 2700 pulses of 100 fs length at a temporal distance of 220 ns followed
by a 99.4 ms gap. To make optimal use of this timing structure and energy range
a great variety of detectors are being developed for use at XFEL.EU, including
2D X-ray imaging cameras that are able to detect images at a rate of 4.5 MHz,
provide dynamic ranges up to 10$^5$ photons per pulse per pixel under different
operating conditions and covering a large range of angular resolution. In order
to characterize, commission and calibrate this variety of detectors and for
testing of detector prototypes the XFEL.EU detector group is building up an
X-ray test laboratory that allows testing of detectors with X-ray photons under
conditions that are as similar to the future beam line conditions at the
XFEL.EU as is possible with laboratory sources. A total of four test
environments provide the infrastructure for detector tests and calibration: two
portable setups that utilize low power X-ray sources and radioactive isotopes,
a test environment where a commercial high power X-ray generator is in use, and
a pulsed X-ray/electron source which will provide pulses as short as 25 ns in
XFEL.EU burst mode combined with target anodes of different materials. The
status of the test environments, three of which are already in use while one is
in commissioning phase, will be presented as well as first results from
performance tests and characterization of the sources.
