Abstract
The results of studying the band characteristics and the efficiency of recording the secondary-electron multipliers VEU-6 and VEU-GOI (manufactured by the Vavilov State Optical Institute (GOI), St. Petersburg) within the ultrasoft X-ray range are given. The measurements were carried out at the metrological station Kosmos with the use of synchrotron radiation from the storage ring VEPP-4M (Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk) in monochromatic radiation at a photon energy of 268 eV. A strong irregularity in the band characteristics of both VEU-6 and VEU-GOI has been found. Their quantum efficiencies are estimated. The measurements are a continuation of the works on calibration of the equipment of the Space Solar Patrol (developed by GOI) using synchrotron radiation from the VEPP-4M storage ring (project MNTTs no. 2500).
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