Zobrazeno 1 - 10
of 66
pro vyhledávání: '"E.H. Farnum"'
Autor:
Takeo Nishitani, D. Orlinski, A.E. Costley, P. E. Stott, Shunya Yamamoto, Chris Walker, K.M. Young, Steven J. Zinkle, G. Janeschitz, E.H. Farnum, L. deKock, Satoshi Kasai, V. Zaveriaev, T. Shikama, E.R. Hodgson, V. Belyakov
Publikováno v:
Journal of Nuclear Materials. :60-69
An overview of the results of the irradiation tests on diagnostic components under the ITER technology R&D tasks and the solutions for the present diagnostic design are given in the light of these results. A comprehensive irradiation database of diag
Publikováno v:
Journal of Nuclear Materials. :1867-1872
Twelve different types of polycrystal and single crystal Al 2 O 3 (alumina and sapphire) specimens of varying grades of purity were irradiated for three reactor cycles in a removable beryllium position in a High Flux Isotopes Reactor (HFIR) at Oak Ri
Publikováno v:
Journal of Nuclear Materials. 255:180-188
Radioluminescence measurements on preform and fiber amorphous silica specimens have been made in the temperature interval 6 to 300 K and wavelength regime 300 to 800 nm. A typical spectrum consists of peaks at ∼550 (main band) and ∼650 (secondary
Publikováno v:
Journal of Nuclear Materials. 232:214-218
Silica-based optical fibers capable of transmitting light in the ultraviolet, visible and infrared regions of the electromagnetic spectrum are gaining widespread use in fusion reactor diagnostic systems. To assess radiation damage in these optical ma
Publikováno v:
Journal of Nuclear Materials. 228:117-128
An experiment to measure radiation-induced electrical degradation (RIED) in a sapphire sample and in three MgO-insulated cables was conducted at the JMTR light water reactor. The materials were irradiated at about 260°C to a fluence of 3 × 1024 n/m
Autor:
M.B. Lee, E.H. Farnum
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 102:113-118
In a deuterium-tritium fusion reactor, neutrons are produced at an energy of about 14 MeV. When these neutrons and other lower energy neutrons from (n,xn) reactions travel through insulating materials in the reactor, displacement damage will occur as
Autor:
Terence E. Mitchell, Masanori Ikari, Takayoshi Iseki, Toyohiko Yano, E.H. Farnum, Frank W. Clinard
Publikováno v:
Journal of the American Ceramic Society. 78:1469-1474
MgO·3Al2O3 single crystals were irradiated with neutron fluences of 8.3 × 1022 n/m2 at 100°C and 2.4 × 1024 n/m2 at 470°C (E > 1.0 MeV) in the Japan Materials Testing Reactor. The Knoop microhardness of several orientations on the (100) plane of
Autor:
E.H. Farnum, Frank W. Clinard
Publikováno v:
Journal of Nuclear Materials. 219:161-164
DC and AC conductivity of Al{sub 2}O{sub 3} ceramics were measured at elevated temperatures during irradiation with neutrons and gamma rays at the Los Alamos Spallation Radiation Effects Facility. DC conductivity was increased at start of irradiation
Publikováno v:
Fusion Engineering and Design. 27:570-586
It is shown that self-cooled liquid metal blankets in tokamaks with high magnetic fields are feasible only with electrically insulating coatings at the duct walls. The requirements for the insulation properties are estimated by simple analytical mode
Publikováno v:
Journal of Nuclear Materials. 219:224-229
Diagnostic systems for fusion reactors will require mirrors capable of reflecting electromagnetic radiation in the soft X-ray, near UV, visible, and IR wavelengths. These components will be exposed to significant fluences of fast neutrons during use.