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ГОСТ 19.102-77. ЕСПД. Стадии разработки |
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1980 |
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1-2 |
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gost, detproj |
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RPLAB @ s @ |
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892 |
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ГОСТ 2.125-2008 ЕСКД Правила выполнения эскизных конструкторских документов |
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Miscellaneous |
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2008 |
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RPLAB @ kostochkin @ |
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934 |
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Krasnosvobodtsev, S. I.; Shabanova, N,P.; Ekimov, E.V.; Nozdrin, V.S.; Pechen, E,V. |
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Critical magnetic field of NbC: new data on clean superconductor films |
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Journal Article |
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1995 |
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Zh. Eks. Teor.Fiz. |
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534-537 |
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The temperature dependence of the upper critical magnetic fields of exceptionally low-defect-density films of the superconducting compound NbC has been investigated, and previously unknown parameters of this clean superconductor and its electronic characteristics have been evaluated. An electron density of states at the Fermi level equal to 1.3 states/ eV. Nb atom, a Fermi velocity equal to 2.2X lo7 cmls, a plasma frequency equal to 3.6 eV, and a coherence length to 24 nm have been obtained with an electron mean free path exceeding 40 nm. A vortex-free state existing over the entire temperature range below T, which causes a many-fold increase in the critical magnetic field of the films when the field is aligned parallel to their surface, has been discovered in very thin films of superconducting niobium carbide. |
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RPLAB @ atomics90 @ |
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956 |
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Gousev, Yu. P.; Semenov, A. D.; Pechen, E. V.; Varlashkin, A. V.; Nebosis, R. S.; Renk K. F |
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Coupling of terahertz radiation to a high-Т(с) superconducting hot electron bolometer mixer |
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1996 |
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Appl. Phys. Lett., |
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69 |
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691-693 |
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We report on efficient coupling of THz radiation to a high-T(c) superconducting hot electron bolometer that is suitable for heterodyne detection. Our quasioptical system consisted of a planar self-complementary spiral antenna on a dielectric substrate clamped to an extended hyperhemispherical lens. The antenna was integrated into a co-planar line for broadband intermediate frequency matching. Measurements in the homodyne regime at a frequency of 2.5 THz showed a radiation pattern with a beam width of 1° and a coupling efficiency of 0.1. We measured, at an intermediate frequency of 1.5 GHz, an output noise temperature of'160 K and estimated for the device, operated in the heterodyne regime, a system noise temperature of 30 000 K. We also discuss possibilities of significant improvement of the sensitivity. |
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RPLAB @ atomics90 @ |
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958 |
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Skocpol', W.J.; Beasley, M.R.; Tinkham M |
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Title |
Self-heating hotspots in superconducting thin film microbridges |
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1974 |
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J. Appl. Phys. |
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45 |
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4054-4066 |
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Heating effects in both long and short superconducting thin-<ef><ac><81>lm rnicrobridges are described and analyzed. Except near T(c), at low voltages where superconducting quantum processes occur, all of our experimental dc I-V characteristics can be satisfactorily understood on the basis of a simple model of a localized normal hotspot maintained by Joule heating. We consider approximations appropriate to the cases of long bridges, short bridges, and bridges coupled to microwave radiation. The analysis leads to analytic expressions for the I-V characteristics which agree well with the experimental data. We show that the formation of such a hotspot is the dominant cause of the hysteresis observed in the I-V characteristics at low temperatures. We also show that the growth of such a hotspot imposes a high-voltage limit on the ac Josephson effect in these devices, and we compare the importance of such heating effects at high voltages in various types of superconducting weak links. |
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RPLAB @ atomics90 @ |
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961 |
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