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

IF 0.7 4区 物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY
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.

Abstract Image

Abstract Image

用KrF激光在10-MeV直线电子加速器上研究热核电厂用紫外光学材料的辐射稳定性。第二部分。样品中的电子束诱导吸收
利用电子能量为10 MeV的脉冲线性电子加速器,研究了多种用于惯性聚变能堆和KrF激光驱动器的窗口和多层涂层的紫外光学材料的长寿命电子束诱导吸收。在测试高纯度的康宁7980、KU-1和KS-4V石英玻璃样品以及氟化钙、氟化镁和白玉晶体时,18.2 MGy的辐射剂量与KrF电子束泵浦激光驱动器以5 Hz脉冲重复率工作1年的窗口所吸收的剂量相当。在248 nm波长处,OH掺杂的石英玻璃KS-4V的吸收系数为0.4 cm-1,是所有玻璃中吸收系数最低的。氟化钙的高吸收率(系数为4 cm-1)被自身的KrF激光辐射有效漂白。
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来源期刊
Bulletin of the Lebedev Physics Institute
Bulletin of the Lebedev Physics Institute PHYSICS, MULTIDISCIPLINARY-
CiteScore
0.70
自引率
25.00%
发文量
41
审稿时长
6-12 weeks
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.
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