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Author Koshelets, V. P.; Shitov, S. V.; Dmitriev, P. N., Ermakov, A. B.; Filippenko, L. V.; Koryukin, O.V.; Sobolev, A.S.; Torgashin, M.Yu.; Yagoubov, P.; Hoogeveen, R.
Title Integrated submillimeter and terahertz receivers with superconducting local oscillator Type (up) Abstract
Year 2004 Publication Presanted at 8th International Workshop “From Andreev Reflection to the International Space Station” Abbreviated Journal
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Call Number Serial 513
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Author Cherednichenko, S.; Khosropanah, P.; Berg, T.; Merkel, H.; Kollberg, E.; Drakinskiy, V.; Voronov, B.; Gol’tsman, G.
Title Optimization of HEB mixer for the Herschel Space Observatory Type (up) Abstract
Year 2004 Publication Proc. 15th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 15th Int. Symp. Space Terahertz Technol.
Volume Issue Pages 16
Keywords NbN HEB mixers, applications
Abstract A mixer development for the HIFI instrument of the Herschel Space Observatory has come to the final stage. In our paper and conference presentation we will describe the most important details of the Band 6 Low and High Mixer Unit design. Special attention will be given to the optimization of the hot- electron bolometer mixer chip, which is based on 3.5nm NbN superconducting film on silicon. As the HEB’s local oscillator power requirements depend on the bolometer size, we have compared mixer noise temperature for different bolometer width- to- length ratio. A trade- off between mixer performance and local oscillator power requirements results in the mixer units equipped with optimized mixer chips, providing the largest coverage of the Band6 RF band with the lowest possible receiver noise. A short account of the beam pattern measurements of Band6 mixers will be given as well.
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Call Number Serial 1490
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Author Semenov, Alexei D.; Hübers, Heinz-Wilhelm; Richter, Heiko; Smirnov, Konstantin; Gol'tsman, Gregory N.; Voronov, Boris M.
Title Superconducting hot-electron bolometer mixer for terahertz heterodyne receivers Type (up) Abstract
Year 2004 Publication Proc. 15th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 15th Int. Symp. Space Terahertz Technol.
Volume Issue Pages 164
Keywords NbN HEB mixers
Abstract A number of on-going astronomical and atmospheric research programs are aimed to the Terahertz (THz) spectral region. At frequencies above about 1.4 THz heterodyne receivers planned for these missions will use superconducting hot-electron bolometers as a mixers. We present current results on the development of superconducting NbN hot- electron bolometer mixer and quasioptical radiation coupling scheme for GREAT (German Receiver for Astronomy at Terahertz Frequencies, to be used aboard of SOFIA) and TELIS (Terahertz Limb Sounder). The mixer is incorporated into hybrid antenna consisting of a planar feed antenna, which has either logarithmic spiral or double-slot configuration, and hyperhemispherical silicon lens. For the log-spiral feed antenna, the double side-band receiver noise temperature of 5500 K was achieved at 4.3 THz. The noise temperature shows less than 3 dB increase in the intermediate frequency band from 4 GHz to 7 GHz. The hybrid antenna had almost frequency independent and symmetric radiation pattern with the beam-width slightly broader than expected for a diffraction limited pattern. Results of FTS measurements in the direct detection regime agreed with the spectral dependence of the noise temperature for spiral antennas with different spacing of inner terminals.
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Call Number Serial 1492
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Author Klaassen, T. O.; Hovenier, J. N.; Adam, A. J. L.; Fischer, J.; Jakob, G.; Poglitsch, A.; Redlich, B.
Title Terahertz calorimetry for the Herschel Space Observatory Type (up) Conference Article
Year 2004 Publication Proc. 29th IRMMW / 12th THz Abbreviated Journal
Volume Issue Pages 815-816
Keywords mirror, reflection index, emissivity, calorimetry, space observatory, terahertz, THz
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Call Number Serial 578
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Author Pan, S. K.; A. R. Kerr, M. W. Pospieszalski; Lauria, E. F.; Crady, W. K.; Horner, N.; Srikanth, Jr. S.; Bryerton, E.; Saini, K.; Claude, S. M. X.; Chin, C. C.; Dindo, P.; Rodrigues, G.; Derdall, D.; Zhang, J. Z.; Lichtenberger, A. W.
Title A fixed-tuned integrated SIS mixer with ultra-wideband IF and quantum-limited sensitivity for ALMA band 3 (84-116 GHz) receivers Type (up) Conference Article
Year 2004 Publication Proc. 15th Int. Symp. Space Terahertz Technol. Abbreviated Journal
Volume Issue Pages 55-61
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Publisher Place of Publication Northampton, MA Editor
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Call Number RPLAB @ s @ SIS_bandw_8GHz Serial 358
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Author Yorke, Harold W.; Paine, Christopher G.; Bradford, Charles M.; Mark Dragovan; Nash, Al E.; Dooley, Jennifer A.; Lawrence, Charles R.
Title Thermal design trades for SAFIR architecture concepts Type (up) Conference Article
Year 2004 Publication Proc. SPIE Abbreviated Journal
Volume 5487 Issue Pages 1617-1624
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Call Number RPLAB @ s @ sun_shield_SAFIR_SPIE_2004 Serial 340
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Author Vachtomin, Y. B.; Antipov, S. V.; Maslennikov, S. N.; Smirnov, K. V.; Polyakov, S. L.; Kaurova, N. S.; Grishina, E. V.; Voronov, B. M.; Gol'tsman, G. N.
Title Noise temperature measurements of NbN phonon-cooled hot electron bolometer mixer at 2.5 and 3.8 THz Type (up) Conference Article
Year 2004 Publication Proc. 15th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 15th Int. Symp. Space Terahertz Technol.
Volume Issue Pages 236-241
Keywords HEB mixer, NbN, direct detection effect
Abstract We present the results of noise temperature measurements of NbN phonon-cooled HEB mixers based on a 3.5 nm NbN film deposited on a high-resistivity Si substrate with a 200 nm – thick MgO buffer layer. The mixer element was integrated with a log-periodic spiral antenna. The noise temperature measurements were performed at 2.5 THz and at 3.8 THz local oscillator frequencies for the 3 µm x 0.2 µm active area devices. The best uncorrected receiver noise temperatures found for these frequencies are 1300 K and 3100 K, respectively. A water vapour discharge laser was used as the LO source. We also present the results of direct detection contribution to the measured Y-factor and of a possible error of noise temperature calculation. This error was more than 8% for the mixer with in-plane dimensions of 2.4 x 0.16 µm 2 at the optimal noise temperature point. The use of a mesh filter enabled us to avoid the effect of direct detection and decrease optical losses by 0.5 dB. The paper is concluded by the investigation results of the mixer polarization response. It was shown that the polarization can differ from the circular one at 3.8 THz by more than 2 dB.
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Publisher Place of Publication Northampton, Massachusetts, USA Editor
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Call Number Serial 344
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Author Ozhegov, R.; Morozov, D.; Maslennikov, S.; Okunev, O.; Smirnov, K.; Gol'tsman, G.
Title Submillimeter wave range imaging system for registering human body radiation and finding out the things covered under clothes Type (up) Conference Article
Year 2004 Publication Proc. 3rd Int. exhibition and conf. Non-Destructive Testing Equipment and Devices Abbreviated Journal
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Publisher Place of Publication Moscow Editor
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Call Number Serial 345
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Author Ожегов, Р. В.; Морозов, Д. В.; Масленников, С. Н.; Смирнов, К. В.; Окунев, О. В.; Гольцман, Г. Н.
Title Тепловизор субмиллиметрового диапазона волн для регистрации теплового излучения тела человека и обнаружения скрытых под одеждой предметов Type (up) Conference Article
Year 2004 Publication 3-я Международная выставка и конференция Неразрушающий контроль и техническая диагностика в промышленности Abbreviated Journal
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Publisher Place of Publication Москва Editor
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Notes Duplicated as 345 Approved no
Call Number Serial 346
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Author Ozhegov, R.; Maslennikov, S.; Morozov, D.; Okunev, O.; Smirnov, K.; Gol'tsman, G.
Title Imaging system for submillimeter wave range Type (up) Conference Article
Year 2004 Publication Proc. Tenth All-Russian sceintific conference of student-physicists and young sceintists (VNKSF-10) Abbreviated Journal
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Corporate Author Thesis
Publisher Place of Publication Moscow Editor
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Call Number RPLAB @ s @ thzimaging_vnksf10_2004 Serial 347
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