Institut d'Astrophysique Spatiale (IAS) 0.1-15KeV synchrotron radiation facility beam lines.

Two beam lines have been built at the Institut d'Astrophysique Spatiale (IAS) d'Orsay to perform absolute calibration of the EPIC (European Photon Imaging Camera). EPIC consists of three X-ray Charge Coupled Device (CCD) cameras having imaging and spectroscopic performances set al the Welter telescope focal planes on board the X-ray Multi Mirror Mission (XMM) planned to be launched by ESA in August 1999. To cover the desired 0.1-15 keV range a dedicated beam line has been built on each synchrotron sources of the Laboratoire pour l'Utilisation du Rayonnement Synchrotron (LURE) : SACO (0.8 GeV) and DCI (1.5 GeV). Both beam lines are merging in a clean 23 m(3) vacuum tank containing the camera to calibrate. The SACO windowless beam line is equipped with a grating monochromator. Four plane VLS gratings are used to cover the low energy range (0.1-1.2 keV). A triple grazing incidence mirror system set in front of the entrance slit removes the overlapping orders. The high energy beam line on DCI has a 50 mu m beryllium window and a double flat crystals monochromator equipped with four different crystal pairs. A double grazing incidence mirror system set close to the source absorbs the high energy photon spectra. CCD calibrations will be performed during 1997 second semester and years 1998.