2007 Fiscal Year Final Research Report Summary
Development of Cartridge-type Superconducting Receiver and Evolution of Interstellar Matter with Atomic and Molecular Line Observations
| Project/Area Number |
17340058
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | National Astronomical Observatory of Japan |
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Principal Investigator |
SEKIMOTO Yutaro National Astronomical Observatory of Japan, Advanced Technology Center, Associate Professor (70262152)
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| Co-Investigator(Kenkyū-buntansha) |
TATEMATSU Ken'ichi National Astronomical Observatory of Japan, Division of Radio Astronomy, Professor (40202171)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Receiver / submillimeter-wave / superconductivity / SIS mixer / beam pattern / amplitude / phase stability |
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| Research Abstract |
A quantum-noise limited superconducting receiver has been developed in the 385-500 GHz frequency range. It has been demonstrated to have ultra low noise of 100 K. In this submillimeter frequency, it is the lowest noise in sideband separating receiver. In addition, some improvements on RF and IF frequency coverage have been investigated. The IF output power from this receiver is so stable that it is suitable for practical operations to measure and integrate weak signals from astronomical objects. High precision beam pattern and cross polarization measurement system has been developed successfully. The achievements were submitted to a refereed journal.
A submillimeter balanced mixer has also been developed for future heterodyne array. It has low noise temperature in the 400-500 GHz frequency range. The results have been accepted by a refereed journal. As an extension of this research, a prototype of a double balanced mixer has been developed.
To study evaluation of interstellar matter, molecular lines such as N2H+, HC3N toward Orion molecular cloud were observed. The results are published in a refereed journal.
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[Journal Article] A385-500GHz Sideband-Separating(2SB)SIS Mixer Based on a Waveguide Split-block Coupler2006
Author(s)
M.Kamikura, Y.Tomimura, Y.Sekimoto, S.Asayama, W.L.Shan, N.Satou, Y.Iizuka, T.Ito, T.Kamba, Y.Serizawa, T.Noguchi
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Journal Title
International Journal of Infrared and Millimeter Waves 27
Pages: 37-53
Description
「研究成果報告書概要(和文)」より
Peer Reviewed
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[Journal Article] A 385-500 GHz Sideband-Separating(2SB) SIS Mixer Based on a Waveguide Split-block Coupler2006
Author(s)
M. Kamikura, Y. Tomimura, Y. Sekimoto, S. Asayama, W. L. Shan, N. Satou, Y. lizuka, T. Ito, T. Kamba, Y. Serizawa, T. Noguchi
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Journal Title
International Journal of Infrared and Millimeter Waves 27
Pages: 37-53
Description
「研究成果報告書概要(欧文)」より
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