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ГОСТ 34.201-89. Виды, комплектность и обозначение документов при создании автоматизированных систем |
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1991 |
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gost, detproj |
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872 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Gogidze, I. G.; Semenov, A. D.; Sergeev, A. V. |
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Title |
Processes of electron-phonon interaction in thin YBaCuO films |
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Journal Article |
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Year |
1991 |
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Phys. C: Supercond. |
Abbreviated Journal |
Phys. C: Supercond. |
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185-189 |
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1371-1372 |
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Keywords |
YBCO HTS detectors |
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The ultrafast voltage response of YBaCuO films to laser radiation is studied and compared with previously investigated quasiparicles response to radiation of submillimeter wavelength range. Voltage shift under the visible light radiation has two components. Picosecond response realized as suppression superconductivity by nonequilibrium excess quasiparticles, response time is determined by quasiparticles recombination rate. Nanosecond response is probably due to bolometric effect. |
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0921-4534 |
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1676 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Potapov, V. D.; Sergeev, A. V. |
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Title |
Restriction of microwave enhancement of superconductivity in impure superconductors due to electron-electron interaction |
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Journal Article |
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Year |
1991 |
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Phys. B Condens. Mat. |
Abbreviated Journal |
Phys. B Condens. Mat. |
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169 |
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1-4 |
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629-630 |
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impure superconductors |
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Transition from microwave enhancement of supercurrent to superconductivity suppression is investigated in impure superconductors. It is demonstrated that frequency range of enhancement effect narrows with the decrease of electron mean free path, ℓ, and at ℓ⩽1nm electron heating is observed in the whole frequency range. Dependences of frequency boundaries on ℓ are explained by taking into account strong electron-electron interaction in impure metals. |
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0921-4526 |
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1682 |
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Гершензон, Е. М.; Грачев, С. А.; Литвак-Горская, Л. Б. |
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Title |
Механизм преобразования частоты в n-InSb-смесителе |
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Journal Article |
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1991 |
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Физика и техника полупроводников |
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Физика и техника полупроводников |
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25 |
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11 |
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1986-1998 |
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n-InSb mixer |
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Проведено комплексное исследование n-InSb смесителя на λ=2.6 мм, включающее в себя исследование вольт-амперных характеристик при E=0−2 В/см, температурной зависимости проводимости в диапазоне T=1.6−20 K, высокочастотной проводимости при f=0.5−10 МГц и магнитосопротивления при H=0−5 кЭ. Показано, что в оптимальном режиме механизм преобразования частоты связан с фотоионизационными процессами при прыжковой фотопроводимости (ПФП). На основе модели ПФП рассчитан коэффициент преобразования смесителя и произведено сопоставление его с экспериментом. Показана несостоятельность модели преобразования частоты в компенсированном n-InSb (K≥0.8), основанной на разогреве электронов. Обсуждены требования к параметрам материала и режимам n-InSb смесителя миллиметрового диапазона волн. |
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Russian |
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1753 |
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Author |
Gershenzon, E. M.; Gershenzon, M. E.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
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Title |
Wide-band highspeed Nb and YBaCuO detectors |
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Journal Article |
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Year |
1991 |
Publication |
IEEE Trans. Magn. |
Abbreviated Journal |
IEEE Trans. Magn. |
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27 |
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2 |
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2836-2839 |
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Keywords |
YBCO, HTS, Nb detectors |
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The physical limitations on the response time and the nature of nonequilibrium detection of radiation were investigated for Nb and YBCO film in a wide spectral range from millimeter to near-infrared wavelengths. In the case of ideal heat removal from the film, the detection mechanism is connected with an electron heating effect which is not selective over a wide spectral interval. For Nb, the dependence of the response time on the electron mean free path l and temperature T is tau varies as T/sup -2/l/sup -1/. The values of detectivity D* and tau are 3*10/sup 11/ W/sup -1/ Hz/sup 1/2/ cm and 5*10/sup -9/ s at T=1.6 K, respectively. For YBCO film the tau value of 1-2 ps at T=77 K was obtained; the NEP value of 3*10/sup -11/ W-Hz/sup -1/2/ can be obtained at T=77 K in the case of the optimal film matching to the radiation. |
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0018-9464 |
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239 |
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