The Aarhus storage ring - A research facility for physics, chemistry, medicine, and materials sciences

The (10.6x10.6) m2 storage ring in Aarhus is now operating both with ions (positive/negative) and with electrons (Emax=580 MeV) for production of synchrotron radiation (SR). In the ion case more than 50 ions and clusters of both polarities and with masses from 1 to 840 amu have been stored at energies from 6 keV to 35 MeV. Equipment for laser- and electron-cooling has been installed. Until now three SR-beamlines have been installed: one with a Zeiss plane grating monochromator (SX.700) and a complete UHV equipment for surface physics. The second one includes a new spherical grating monochromator (SGM) for atomic physics equipment. The third is dedicated to an imaging X-ray microscope. Thus, today ASTRID is the scene of a wide range of research using SR from infrared to X-rays and ions of many types. For the ion case an EBIS ion source for injection of multiply charged ions is under construction, together with a new detection facility for charge and mass detection of collision fragments. For SR a VUV undulator and a micropole undulator is under construction. (orig.)