-
Article
Metamorphosed Ultramafic and Mafic Lithoclasts and Detrital Minerals from Sandstones of Clastic Ophiolitic Deposits of the Rassokha Terrane: A Setting of Formation of the Chersky Range Ophiolites
Ophiolite-derived clastic rocks of the Rassokha terrane in the Chersky Range of the Verkhoyansk−Kolyma folded area were studied to obtain representative characteristics of the eroded source metamorphosed ultra...
-
Article
40Ar/39Ar Age of Phengite from Sandstone of the Ophiolite-Derived Clastic Sequence of the Basin of the Rassokha River, Collision Belt of the Chersky Range
The Early Permian (275.3 ± 3.1 Ma) 40Ar/39Ar plateau age of detrital mica (Cr-phengite) from clasts in listvenite sandstones of the ophiolite-derived clastic sequence of the Rassokha Terrane of the Chersky Range ...
-
Article
Control of the Process of Plasma Cleaning of Input Mirrors of Optical Diagnostics of ITER in Glow Discharge Controlled by Direct and Mid-Frequency Pulsed Direct Current
The intravacuum mirrors used in the systems of optical plasma diagnostics on fusion installations are subject to contamination and require periodic cleaning. It is proposed to clean the mirrors by ion sputteri...
-
Article
The Tectonic Evolution and Provenance of the Lower Paleozoic Terrigenous Rocks of the Omulevka and Rassokha Terranes, Northeast Russia
This paper presents the data on the geological structure of the Lower Paleozoic complexes of the Omulevka and Rassokha terranes, which occur in the western part of the Kolyma–Omolon microcontinent. The Lower P...
-
Article
Initializing the Discharge in the “Active Spectroscopy” Diagnostic Mirror Cleaning System of the ITER Reactor Using a Thermoemission Cathode
The results of a study into the limiting operating conditions for gas pressure when using D2, He, Ne, and Ar in the “Active spectroscopy” diagnostic plasma cleaning system for the input mirror of the ITER reactor...
-
Article
The Influence of a Gas Flow on the Efficiency of the Active Spectroscopy Plasma Cleaning System of the Input Mirror of Optical Diagnostics at ITER
The results of a study of the effects of a gas flow through the discharge region and the location of the diagnostic port walls close to the discharge cell on the efficiency of the plasma system for cleaning th...
-
Article
Effect of Irradiation with Low-Energy Helium Ions on the Spectral Reflectance of Single-Crystal Molybdenum Mirrors
A comparative study of the effect of irradiation with helium ions on the optical properties of single-crystal molybdenum mirrors with crystallographic orientations 〈110〉 and 〈111〉 is presented. The irradiation...
-
Article
Valanginian Subalkaline Magmatism of the Rassokha and Argatass Terranes (Northeastern Russia)
Based on the U–Th–Pb (SIMS) dating of zircons from magmatic bodies of trachytes and trachydolerites of the Upper Agyndzha complex located within the Rassokha island arc and Argatass oceanic terranes, we have r...
-
Article
Ion-Stimulated Pitting during the Successive Irradiation of Molybdenum Mirrors with Helium and Argon Ions
The effect of the formation of numerous pits on the surface of polished polycrystalline and single-crystal Mo mirrors after their successive irradiation with He and Ar ions in a gas discharge is found. The pit...
-
Article
Development of the Plasma Cleaning System for the Entrance Mirror of the CXRS-edge Diagnostics of ITER on the Basis of a Discharge with a Mesh Hollow Cathode
The dependence of the sputtering efficiency for a Mo mirror mock-up on the discharge power and the pressure of the working gas (Ar) has been investigated for three options of grounding of the discharge-cell el...
-
Article
Investigation of Molybdenum Mirror Degradation during Simulated Leakage in the Water Cooling System of ITER
Contamination of ITER in-vessel components in accidents associated with the ingress of water from the cooling system into the vacuum vessel poses a threat to subsequent operation of the entire facility and ind...
-
Article
Angular Distributions during Magnetron Sputtering of Polycrystalline Mg, Al, Si, Ti, Cr, Cu, Zn, Ge, Zr, Nb, Mo, Ag, In, Sn, W, Pt, Au, and Bi Targets
The results of experimental investigations of the angular distributions during magnetron sputtering of Mg, Al, Si, Ti, Cr, Cu, Zn, Ge, Zr, Nb, Mo, Ag, In, Sn, W, Pt, Au, and Bi targets in argon at a constant c...
-
Article
Silurian Granitoid Magmatism of the Rassokha Terrane (North-East Russia)
U–Pb dating of zircons from granitoids located within the Rassokha terrane show a Silurian age of their formation. Younger dates from one of the samples are related to radiogenic lead loss during secondary alt...
-
Article
Optimizing the Position of a Rotating Substrate during Magnetron Deposition of Thickness-Uniform Coatings
An analytical model of the sputter deposition on an inclined flat rotating substrate, which is shifted relative to the magnetron, is developed for a magnetron with a disk cathode. The angular distribution of s...
-
Article
Analysis of the Mo/Mo Nanocrystalline Optical Coating Obtained with the Aid of Simultaneous Deposition and Ion Sputtering
Structure, optical properties, and resistance to sputtering are studied for a reflecting Mo-coating that is fabricated using magnetron deposition with simultaneous low-energy ion sputtering at the deposition r...
-
Article
A Discharge Cell that Combines a Magnetron and a Hollow Cathode for Cleaning Substrates and Subsequent Deposition of Coatings
A discharge cell that is electrically insulated from a vacuum chamber is described. The cell consists of a cylindrical mesh hollow cathode and a planar magnetron with a disk cathode, an unbalanced magnetic sys...
-
Article
Increase in the accuracy of approximating the profile of the erosion zone in planar magnetrons
It has been shown that the use of the survival function of the Weibull distribution shifted along the ordinate axis allows one to increase the accuracy of the approximation of the normalized profile of an eros...
-
Article
Improvement in the homogeneity of molybdenium coatings deposited onto polished polycrystalline molybdenium substrates
The surface morphology of optical sputter-resistant nanocrystal molybdenum coatings formed by magnetron sputtering is investigated. The coatings deposited onto polished polycrystalline molybdenum mirrors have ...
-
Article
Approximation of the erosion zone profile in planar magnetrons with a disk cathode
We have proposed a universal approximation of the normalized erosion zone profile of planar magnetrons with a disk cathode by a composite function that includes the probability density function for the minimal...
-
Article
Factors determining the efficiency of magnetron sputtering. Optimization criteria
We report on the results of experimental study of the dependence of sputtering energy efficiency K w in a dc planar magnetron sputtering setup on the discharge ...
