Investigation of Radiation Stability of UV Optical Materials for Thermonuclear Power Plant with KrF Laser Driver at a Linear 10-MeV Electron Accelerator. Part II. Electron-Beam Induced Absorption in Samples
V. D. Zvorykin, S. V. Arlantsev, V. V. Khankin, V. I. Shvedunov, N. N. Ustinovskii
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引用次数: 0
Abstract
Long-lived electron-beam-induced absorption in a number of UV-optical materials for windows and multilayer coatings of inertial fusion energy reactor and promising KrF laser driver was studied using a pulsed linear electron accelerator with electron energy of 10 MeV. In testing high-purity samples of quartz glasses Corning 7980, KU-1, and KS-4V, as well as crystals of calcium fluoride, magnesium fluoride, and leucosapphire the radiation dose of 18.2 MGy, was comparable to the dose absorbed by windows of KrF electron-beam-pumped laser driver operating for 1 year with a pulse repetition rate of 5 Hz. Quartz glass KS-4V with an admixture of OH showed the lowest absorption with a coefficient of 0.4 cm–1 at a wavelength of 248 nm among all other glasses. Rather high absorption with a coefficient of 4 cm–1 in calcium fluoride is effectively bleached by the own KrF laser radiation.
期刊介绍:
Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.