| Records |
| Author |
Yagoubov, P.; van de Stadt, H.; Hoogeveen, R.; Koshelets, V.; Birk, Manfred; Murk, A. |
| Title |
OPTICAL DESIGN OF SUB-MILLIMETER SPECTROMETER FOR LIMB SOUNDER |
Type |
Journal Article |
| Year |
2005 |
Publication |
International Symposium on Space Terahertz Technology |
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| Keywords |
Cryogenic terahertz heterodyne receiver, remote sensing, TELIS, submillimeter |
| Abstract |
TELIS (Terahertz and submm Limb Sounder) is a cooperation between DLR (Institute for Remote Sensing Technology, Germany), RAL (Rutherford Appleton Laboratories, UK) and SRON (National Institute for Space Research, the Netherlands), to build a three-channel balloon-borne heterodyne spectrometer for atmospheric research. The three receivers will operate simultaneously at 500 GHz (channel developed by RAL), at 550-650 GHz (SRON in collaboration with IREE), and at 1.8 THz (DLR). The balloon platform on which TELIS will fly also contains a Fourier transform spectrometer: MIPAS-B developed by the IMK (Institute of Meteorology and Climate research of the University of Karlsruhe, Germany). MIPAS-B will simultaneously measure within the range 680 to 2400 cm-1. The combination of the TELIS and MIPAS instruments will provide an unprecedented wealth of scientific data and will also be used to validate other instruments and atmospheric chemistry models. In this paper we present the optical design of TELIS with an emphasis on the 550-650 GHz channel. The main design goal was to generate a high efficiency antenna beam over the full frequency range, with low side lobes and close to diffraction limited angular resolution in the vertical direction at the sky. All these requirements had to be achieved within a small volume and low mass. Design and validation of the optics, as well as estimation of optical components tolerances, was done using commercial software packages ZEMAX and GRASP. |
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event_dates=2005-05-31 – 2005-06-03; |
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no |
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414 |
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| Author |
Ozhegov, R. V.; Gorshkov, K. N.; Smirnov, K. V.; Gol’tsman, G. N.; Filippenko, L. V.; Koshelets, V. P. |
| Title |
Terahertz imaging system based on superconducting integrated receiver |
Type |
Conference Article |
| Year |
2010 |
Publication |
Proc. 2-nd Int. Conf. Terahertz and Microwave radiation: Generation, Detection and Applications |
Abbreviated Journal |
Proc. 2-nd Int. Conf. Terahertz and Microwave radiation: Generation, Detection and Applications |
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Pages |
20-22 |
| Keywords |
SIS mixer, SIR |
| Abstract |
The development of terahertz imaging instruments for security systems is on the cutting edge of terahertz technology. We are developing a THz imaging system based on a superconducting integrated receiver (SIR). An SIR is a new type of heterodyne receiver based on an SIS mixer integrated with a flux-flow oscillator (FFO) and a harmonic mixer which is used for phase-locking the FFO. Developing an array of SIRs would allow obtaining amplitude and phase characteristics of incident radiation in the plane of the receiver. Employing an SIR in an imaging system means building an entirely new instrument with many advantages compare to traditional systems: i) high temperature resolution, comparable to the best results for incoherent receivers; ii) high spectral resolution allowing spectral analysis of various substances; iii) the local oscillator frequency can be varied to obtain images at different frequencies, effectively providing “color” images; iv) since a heterodyne receiver preserves the phase of the radiation, it is possible to construct 3D images. The paper presents a prototype THz imaging system using an 1 pixel SIR. We have studied the dependence of the noise equivalent temperature difference (NETD) on the integration time and also possible ways of achieving best possible sensitivity. An NETD of 13 mK was obtained with an integration time of 1 sec a detection bandwidth of 4 GHz at a local oscillator frequency of 520 GHz. An important advantage of an FFO is its wide operation range: 300-700 GHz. |
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no |
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ozhegov2010terahertz |
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1397 |
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| Author |
Koshelets, V. P. |
| Title |
Integrated superconducting submm receivers |
Type |
Miscellaneous |
| Year |
2004 |
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SIR |
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no |
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511 |
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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 |
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Abstract |
| Year |
2004 |
Publication |
Presanted at 8th International Workshop “From Andreev Reflection to the International Space Station” |
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no |
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513 |
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Koshelets, V. P.; Ermakov, A. B.; Filippenko, L. V.; Koryukin, O. V.; Khudchenko, A. V.; Sobolev, A. S.; Torgashin, M. Yu.; Yagoubov, P. A.; Hoogeveen, R. W. M.; Vreeling, W. J.; Wild, W.; Pylypenko, O. M. |
| Title |
Superconducting submm integrated receiver for TELIS |
Type |
Conference Article |
| Year |
2006 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
| Volume |
43 |
Issue |
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Pages |
1377-1380 |
| Keywords |
SIR |
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1742-6588 |
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514 |
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Koshelets, V. P.; Dmitriev, P. N.; Ermakov, A. B.; Filippenko, L. V.; Khudchenko, A. V.; Koryukin, O. V.; Torgashin, M. Yu.; Hoogeveen, R.; Vreeling, W. J.; Yagoubov, P. |
| Title |
SIR for TELIS (post-critical) review |
Type |
Miscellaneous |
| Year |
2004 |
Publication |
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SIR |
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516 |
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Mygind, J.; Samuelsen, M. R.; Koshelets, V. P.; Sobolev, A. S. |
| Title |
Simple theory for the spectral. linewidth of the mm-wave Josephson flux flow oscillator |
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Abstract |
| Year |
2005 |
Publication |
Pi-shift Workshop “Physics of superconducting phase-shift devices” |
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22-22 |
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SIR |
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Ischia, Italy |
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no |
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520 |
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Koshelets, V. P.; Dmitriev, P. N.; Ermakov, A. B.; Filippenko, L. V.; Sobolev, A. S.; Torgashin, M. Yu.; Borisov, V. B. |
| Title |
Superconducting flux-flow oscillators for THz integrated receiver |
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Abstract |
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2005 |
Publication |
Presented at the second Franco-Russian Seminar on Nanotechnologies |
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SIR |
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Lille, France |
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no |
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521 |
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Vaks, V. L.; Kurin, V. V.; Pankratov, A. L.; Koshelets, V. P. |
| Title |
Investigation of spectral properties of phase-focked flux flow oscillator |
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Abstract |
| Year |
2005 |
Publication |
ISEC |
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Pages |
PD-04 |
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SIR, FFO |
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Netherlands |
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no |
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522 |
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Hoogeveen, R. W. M.; Yagoubov, P. A.; de Lange, A.; Selig, A. M.; Koshelets, V. P.; Ellison B. N.; Birk, M. |
| Title |
Superconducting integrated receiver development for TELIS |
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Conference Article |
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2005 |
Publication |
Proc. 12th International Symposium on Remote Sensing |
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SIR |
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Bruges, Belgium |
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no |
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523 |
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Koshelets, V. P.; Borisov, V. B.; Dmitriev, P. N.; Ermakov, A. B.; Filippenko, L. V.; Khudchenko, A. V.; Kiselev, O. S.; Lapitskaya, I. L.; Sobolev, A. S.; Torgashin, M. Yu.; Yagoubov, P. A.; Hoogeveen, R. W. M. |
| Title |
Integrated submillimeter receiver for TELIS |
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Journal Article |
| Year |
2006 |
Publication |
Joint International Workshop “Nanosensors and Arrays of Quantum Dots and Josephson Junctions for space applications”, 10th International Workshop “From Andreev Reflection to the Earliest Universe” |
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SIR |
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Bjorkliden, Kiruna, Sweden |
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Presentation |
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no |
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527 |
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Yagoubov, P.; Hoogeveen, R.; Torgashin, M.; Khudchenko, A.; Koshelets, V.; Suttiwong, N.; Wagner, G.; Birk M. |
| Title |
550-650 GHz spectrometer development for TELIS |
Type |
Conference Article |
| Year |
2006 |
Publication |
Proc. 17th Int. Symp. Space Terahertz Technol. |
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Pages |
338-341 |
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SIR |
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no |
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528 |
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Ozhegov, R. V.; Gorshkov, K. N.; Vachtomin, Y. B.; Smirnov, K. V.; Finkel, M. I.; Goltsman, G. N.; Kiselev, O. S.; Kinev, N. V.; Filippenko, L. V.; Koshelets, V. P. |
| Title |
Terahertz imaging system based on superconducting heterodyne integrated receiver |
Type |
Conference Article |
| Year |
2014 |
Publication |
Proc. THz and Security Applications |
Abbreviated Journal |
Proc. THz and Security Applications |
| Volume |
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Issue |
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Pages |
113-125 |
| Keywords |
SIS mixer, SIR, THz imaging |
| Abstract |
The development of terahertz imaging instruments for security systems is on the cutting edge of terahertz technology. We are developing a THz imaging system based on a superconducting integrated receiver (SIR). An SIR is a new type of heterodyne receiver based on an SIS mixer integrated with a flux-flow oscillator (FFO) and a harmonic mixer which is used for phase-locking the FFO. Employing an SIR in an imaging system means building an entirely new instrument with many advantages compared to traditional systems.
In this project we propose a prototype THz imaging system using an 1 pixel SIR and 2D scanner. At a local oscillator frequency of 500 GHz the best noise equivalent temperature difference (NETD) of the SIR is 10 mK at an integration time of 1 s and a detection bandwidth of 4 GHz. The scanner consists of two rotating flat mirrors placed in front of the antenna consisting of a spherical primary reflector and an aspherical secondary reflector. The diameter of the primary reflector is 0.3 m. The operating frequency of the imaging system is 600 GHz, the frame rate is 0.1 FPS, the scanning area is 0.5 × 0.5 m2, the image resolution is 50 × 50 pixels, the distance from an object to the scanner was 3 m. We have obtained THz images with a spatial resolution of 8 mm and a NETD of less than 2 K. |
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Springer Netherlands |
Place of Publication |
Dordrecht |
Editor |
Corsi, C.; Sizov, F. |
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978-94-017-8828-1 |
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no |
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1368 |
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Baksheeva, K.; Ozhegov, R.; Goltsman, G.; Kinev, N.; Koshelets, V.; Kochnev, A.; Betzalel, N.; Puzenko, A.; Ben Ishai, P.; Feldman, Y. |
| Title |
The sub THz emission of the human body under physiological stress |
Type |
Journal Article |
| Year |
2021 |
Publication |
IEEE Trans. Terahertz Sci. Technol. |
Abbreviated Journal |
IEEE Trans. Terahertz Sci. Technol. |
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Pages |
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skin sub-THz emission, medicine |
| Abstract |
We present evidence that in the sub-THz frequency band, human skin can be considered as an electromagnetic bio-metamaterial, in that its natural emission is a product of skin tissue geometry and embedded structures. Radiometry was performed on 32 human subjects from 480 to 700 GHz. Concurrently, the subjects were exposed to stress, while heart pulse rate (PS) and galvanic skin response (GSR) were also measured. The results are substantially different from the expected black body radiation signal of the skin surface. PS and GSR correlate to the emissivity. Using a simulation model for the skin, we find that the sweat duct is a critical element. The simulated frequency spectra qualitatively match the measured emission spectra and show that our sub-THz emission is modulated by our level of mental stress. This opens avenues for the remote monitoring of the human state. |
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no |
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9380570 |
Serial |
1259 |
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Baksheeva, K.; Vdovydchenko, A.; Gorshkov, K.; Ozhegov, R.; Kinev, N.; Koshelets, V.; Goltsman, G. |
| Title |
Study of human skin radiation in the terahertz frequency range |
Type |
Conference Article |
| Year |
2019 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
| Volume |
1410 |
Issue |
|
Pages |
012076 (1 to 5) |
| Keywords |
SIS mixer, SIR, applications, medicine, sympathetic nervous system, SNS |
| Abstract |
The radiation of human skin in the terahertz frequency range under the influence of mental stresses has been studied in the current work. An experimental setup for observation of changes in human skin radiation, which occur under the influence of psychological stresses, by means of a superconducting integrated receiver has been developed. More than 30 volunteers participate in these studies, which allows us to verify presence of correlation between the signals from the superconducting integrated terahertz receiver and other sensors that monitor human mental stress. |
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1742-6588 |
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no |
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1272 |
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