What does BESSY II have to offer?


Interior view of BESSY II hall

BESSY II offers extremely brilliant synchrotron light pulses in the terahertz range to the visible spectrum all the way to hard X-rays, with an emphasis on the soft X-ray range. At each of the beamlines' experimental stations, researchers are able to adjust wavelength, polarization, and photon energy so as to examine their samples at spatial resolutions in the nanometer range (10-9 meters). In addition, the ultrashort light pulses offer insights into the dynamics of ultrafast reactions in the femtosecond range (10-15 seconds).

Each year, BESSY II attracts some 2,500 scientists from Germany and abroad who appreciate the large-scale equipment for its exceptional reliability. These users help shape BESSY II's profile. An important role in all this is played by institutional users like the Max Planck Society, the Federal Institute for Material Research, and other research groups that are part of the collaborative. As such, because of the activities of the Physical Technical Federal Institute, BESSY II has become the European radiation norm for light source and detector calibration.

HZB experts are continually helping to refine the large-scale equipment. As of fall 2012, during operation, electron packets can be shot out every 30 to 60 seconds in top up mode. A new LINAC type pre-accelerator was incorporated for this purpose. In addition, the beamline is adjusted 150 times per second using fast orbit feedback. These measures help improve the sensitive X-ray optics' stability while ensuring a near constant light intensity.