Records |
Author |
Kawamura, Jonathan; Blundell, Raymond; Tong, C.-Y. Edward; Papa, D. Cosmo; Hunter, Todd R.; Paine, Scot.t. N.; Patt, Ferdinand; Gol'tsman, Gregory; Cherednichenko, Sergei; Voronov, Boris; Gershenzon, Eugene |
Title |
Superconductive hot-electron bolometer mixer receiver for 800 GHz operation |
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Miscellaneous |
Year |
2000 |
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IEEE Trans. Microwave Theory and Techniques |
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IEEE Trans. Microwave Theory and Techniques |
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48 |
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4 |
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683-689 |
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RPLAB @ s @ Kawamura_superconductivehot-electron |
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424 |
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Gundlach, K. H.; Schicke, M. |
Title |
SIS and bolometer mixers for terahertz frequencies |
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Journal Article |
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2000 |
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Supercond. Sci. Technol |
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13 |
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181-187 |
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RPLAB @ s @ sis_Gundlach_2000 |
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302 |
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Tong, C.-Y. Edward; Kawamura, Jonathan; Todd, R. Hunter; Papa, D. Cosmo; Blundell, Raymond.; Smith, Michael; Patt, Ferdinand; Gol'tsman, Gregory; Gershenzon, Eugene |
Title |
Successful operation of a 1 THz NbN hot-electron bolometer receiver |
Type |
Conference Article |
Year |
2000 |
Publication |
Proc. 11th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 11th Int. Symp. Space Terahertz Technol. |
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49-59 |
Keywords |
NbN HEB mixers, applications |
Abstract |
A phonon-cooled NbN superconductive hot-electron bolometer receiver covering the frequency range 0.8-1.04 THz has successfully been used for astronomical observation at the Sub-Millimeter Telescope Observatory on Mount Graham, Arizona. This waveguide heterodyne receiver is a modified version of our fixed-tuned 800 GHz HEB receiver to allow for operation beyond 1 THz. The measured noise temperature of this receiver is about 1250 K at 0.81 THz, 560 K at 0.84 THz, and 1600 K at 1.035 THz. It has a 1 GHz wide IF bandwidth, centered at 1.8 GHz. This receiver has recently been used to detect the CO (9-8) molecular line emission at 1.037 THz in the Orion nebula. This is the first time a ground-based heterodyne receiver has been used to detect a celestial source above 1 THz. |
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Semenov, A. D.; Hübers, H.–W.; Schubert, J.; Gol'tsman, G. N.; Elantiev, A. I.; Voronov, B. M.; Gershenzon, E. M. |
Title |
Frequency dependent noise temperature of the lattice cooled hot-electron terahertz mixer |
Type |
Conference Article |
Year |
2000 |
Publication |
Proc. 11th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 11th Int. Symp. Space Terahertz Technol. |
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39-48 |
Keywords |
NbN HEB mixers |
Abstract |
We present the measurements and the theoretical model on the frequency dependent noise temperature of a lattice cooled hot electron bolometer (HEB) mixer in the terahertz frequency range. The experimentally observed increase of the noise temperature with frequency is a cumulative effect of the non-uniform distribution of the high frequency current in the bolometer and the charge imbalance, which occurs near the edges of the normal domain and contacts with normal metal. In addition, we present experimental results which show that the noise temperature of a HEB mixer can be reduced by about 30% due to a Parylene antireflection coating on the Silicon hyperhemispheric lens. |
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305 |
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Kardashev, N. S.; Andreyanov, V. V.; Buyakas, V. I.; Vinogradov, I. S.; Gvamichava, A. S.; Kotik, A. I.; Kurt, V. G.; Lazareva, G. S.; Mironova, E. N.; Myshonkova, N. V.; Slysh, V. I.; Trubnikov, A. G.; Troitskiy, V. F.; Puryaev, D. T.; Usyukin, V. I. |
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The Millimetron project |
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Conference Article |
Year |
2000 |
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Proc. Lebedev Phys. Institute |
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228 |
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RPLAB @ s @ MILLIMETRON_first |
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308 |
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Кардашев, Н. С.; Андреянов, В. В.; Буякас, В. И.; Виноградов, И. С.; Гвамичева, А. С.; Котик, А. И.; Курт, В. Г.; Лазарева, Г. С.; Миронова, Е. Н.; Мышонкова, Н. В.; Слыш, В. И.; Трубников, А. Г.; Троитский, В. Ф.; Пуряев, Д. Т.; Юсюкин, В. И. |
Title |
Проект Миллиметрон |
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Journal Article |
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2000 |
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Труды ФИАН им. Лебедева |
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228 |
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RPLAB @ s @ MILLIMETRON_first_rus |
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309 |
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Hansen, Lene; Jørgensen, H.E.; Nørgaard-Nielsen, Hans Ulrik; Pedersen, Kenneth; Goudfrooij, P.; Linden-Vornle, M.J.D. |
Title |
ISO far-infrared observations of rich galaxy clusters III. Abell 2029, Abell 2052, Abell 2142 |
Type |
Journal Article |
Year |
2000 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
Volume |
362 |
Issue |
1 |
Pages |
133-137 |
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Abstract |
A sample of five rich galaxy clusters has been mapped by ISO at 60 μm, 100 μm, 135 μm, and 200 μm using the PHT-C camera. In previous papers Abell 2670 and Sersic 159-03 were discussed. Here we present the results for Abell 2029, Abell 2052, and Abell 2142. The conclusion of the survey is that the relatively small fields (approximate to 60 square are minutes) are structured with filaments or superpositions of point sources. In some cases point sources (approximate to 0.1 Jy) can be identified with cluster galaxies. An attempt to demonstrate infrared emission from dust in the cooling flows (due to star formation) was inconclusive. |
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RPLAB @ s @ |
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456 |
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Gerecht, E.; Musante, C.F.; Zhuang, Y.; Ji, M.; Yngvesson, K.S.; Goyette, T.; Waldman, J. |
Title |
NbN hot electron bolometric mixer with intrinsic receiver noise temperature of less than five times the quantum noise limit |
Type |
Conference Article |
Year |
2000 |
Publication |
Proc. IMS |
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2 |
Issue |
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Pages |
1007-1010 |
Keywords |
HEB mixer |
Abstract |
In recent years, improvements in device development and quasi-optical coupling techniques utilizing planar antennas have led to a significant achievement in low noise receivers for the edges of the submillimeter frequency regime. Hot electron bolometric (HEB) receivers made of thin superconducting films such as NbN have produced a viable option for instruments designed to measure the molecular spectra for astronomical applications as well as in remote sensing of the atmosphere in the THz regime. This paper describes an NbN HEB mixer with intrinsic DSB receiver noise temperature of at most five times the quantum noise limit at frequencies as high as 2.24 THz |
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477 |
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Saslaw, William C. |
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The distribution of the galaxies. Gravitational clustering in cosmology |
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Book Whole |
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2000 |
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Press syndicate of the University of Cambridge |
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astronomy |
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495 |
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Nagatsuma, T.; Hirata, A.; Royter, Y.; Shinagawa, M.; Furuta, T.; Ishibashi, T.; Ito, H. |
Title |
A 120-GHz integrated photonic transmitter |
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Conference Article |
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2000 |
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Proc. International topical meeting on microwave photonics (MWP 2000) |
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225 - 228 |
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THz, teraherts communications, terahertz communication channel, photodiode, transmitter |
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A photonics-based 120-GHz transmitter has been developed. A photodiode, a planar antenna and a silicon lens were integrated to form a compact millimeter-wave (MMW) emitter. The MMW signal emitted from the transmitter has been detected with a waveguide-mounted Schottky diode. The received power exceeded 100 μW, which is the highest value ever reported for photonic MMW transmitter at frequencies of >100 GHz |
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595 |
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Hoevers, H. F. C.; Bento, A. C.; Bruijn, M. P.; Gottardi, L.; Korevaar, M. A. N.; Mels, W. A.; de Korte, P. A. J. |
Title |
Thermal fluctuation noise in a voltage biased superconducting transition edge thermometer |
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Journal Article |
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2000 |
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Applied Physics Letters |
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Appl. Phys. Lett. |
Volume |
77 |
Issue |
26 |
Pages |
4421-4424 |
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TES; bolometer; thermal fluctuation noise; TFN |
Abstract |
The current noise at the output of a microcalorimeter with a voltage biased superconducting transition edge thermometer is studied in detail. In addition to the two well-known noise sources: thermal fluctuation noise from the heat link to the bath and Johnson noise from the resistive thermometer, a third noise source strongly correlated with the steepness of the thermometer is required to fit the measured noise spectra. Thermal fluctuation noise, originating in the thermometer itself, fully explains the additional noise. A simple model provides quantitative agreement between the observed and calculated noise spectra for all bias points in the superconducting transition. |
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RPLAB @ gujma @ |
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759 |
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ГОСТ 2.711-82. ЕСКД. Схема деления изделия на составные части |
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2000 |
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gost, detproj |
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859 |
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Khosropanah, P.; Merkel, H.; Yngvesson, S.; Adam, A.; Cherednichenko, S.; Kollberg, E. |
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A distributed device model for phonon-cooled HEB mixers predicting IV characteristics, gain, noise and IF bandwidth |
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Conference Article |
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2000 |
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Proc. 11th Int. Symp. Space Terahertz Technol. |
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474-488 |
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HEB mixer numerical model, diffusion cooling channel, diffusion channel, distributed HEB model, distributed model |
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A distributed model for phonon-cooled superconductor hot electron bolometer (HEB) mixers is given, which is based on solving the one-dimensional heat balance equation for the electron temperature profile along the superconductor strip. In this model it is assumed that the LO power is absorbed uniformly along the bridge but the DC power absorption depends on the local resistivity and is thus not uniform. The electron temperature dependence of the resistivity is assumed to be continuous and has a Fermi form. These assumptions are used in setting up the non-linear heat balance equation, which is solved numerically for the electron temperature profile along the bolometer strip. Based on this profile the resistance of the device and the IV curves are calculated. The IV curves are in excellent agreement with measurement results. Using a small signal model the conversion gain of the mixer is obtained. The expressions for Johnson noise and thermal fluctuation noise are derived. The calculated results are in close agreement with measurements, provided that one of the parameters used is adjusted. |
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University of Michigan, Ann Arbor, MI USA |
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Leisawitz, David T.; Danchi, William C.; Dipirro, Michael J.; Feinberg, Lee D.; Gezari, Daniel Y.; Hagopian, Mike; Langer, William D.; Mather, John C.; Moseley, Jr. Samuel H.; Shao, Michael; Silverberg, Robert F.; Staguhn, Johannes G.; Swain, Mark R.; Yorke, Harold W.; Zhang, Xiaolei |
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Scientific motivation and technology requirements for the SPIRIT and SPECS far-infrared/submillimeter space interferometers |
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Conference Article |
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2000 |
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Proc. SPIE |
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Proc. SPIE |
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4013 |
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36-46 |
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HEB applications |
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Far infrared interferometers in space would enable extraordinary measurements of the early universe, the formation of galaxies, stars, and planets, and would have great discovery potential. Since half the luminosity of the universe and 98% of the photons released since the Big Bang are now observable at far IR wavelengths (40 – 500 micrometers ), and the Earth's atmosphere prevents sensitive observations from the ground, this is one of the last unexplored frontiers of space astronomy. We present the engineering and technology requirements that stem from a set of compelling scientific goals and discuss possible configurations for two proposed NASA missions, the Space Infrared Interferometric Telescope and the Submillimeter Probe of the Evolution of Cosmic Structure. |
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909 |
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Floet D. W.; Gao J. R.; Klapwijk T. M.; de Korte P. A. J. |
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Bias Dependence of the Thermal Time Constant in Nb Superconducting Diffusion-Cooled HEB Mixers |
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Journal Article |
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2000 |
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Appl. Phys. Lett. |
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Appl. Phys. Lett. |
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77 |
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1719 |
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We present an experimental study of the intermediate frequency bandwidth of a Nb diffusion-cooled hot-electron bolometer mixer for different bias voltages. The measurements show that the bandwidth increases with increasing voltage. Analysis of the data reveals that this effect is mainly caused by a decrease of the intrinsic thermal time of the mixer and that the effect of electrothermal feedback through the intermediate frequency circuit is small. The results are understood using a qualitative model, which takes into account the different effective diffusion constants in the normal and superconducting domains. |
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RPLAB @ atomics90 @ |
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971 |
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