Electromagnetic radiation due to thermal agitation in a D-band cavity
At resonant frequencies in a microwave cavity, electromagnetic radiation is induced due to thermal agitation. We investigated the TM 010 mode of a D-band cavity at room and liquid nitrogen temperatures. We assumed that the power spectrum is Lorenzian and that the integral of the spectrum is equal to...
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| Veröffentlicht in: | Japanese Journal of Applied Physics 1997-04, Vol.36 (4A), p.2399-2403 |
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| container_end_page | 2403 |
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| container_issue | 4A |
| container_start_page | 2399 |
| container_title | Japanese Journal of Applied Physics |
| container_volume | 36 |
| creator | INAGAKI, S EZURA, E KOBAYASHI, M MORIMOTO, K |
| description | At resonant frequencies in a microwave cavity, electromagnetic radiation is induced due to thermal agitation. We investigated the TM
010
mode of a D-band cavity at room and liquid nitrogen temperatures. We assumed that the power spectrum is Lorenzian and that the integral of the spectrum is equal to the expectation energy of a single degree of freedom. Using the coupling constants, measured with a network analyzer, and the Johnson-Nyquist noise as a reference power level, we evaluated the absolute value of the radiation at room temperature. The measured peak value was almost half the expected value. The disagreement can partly be explained in terms of an equivalent temperature which can be different from the physical temperature. This experiment was made possible through the adoption of a cooled high-electron-mobility-transistor (HEMT) amplifier and parallel band-pass filters. |
| doi_str_mv | 10.1143/jjap.36.2399 |
| format | Article |
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010
mode of a D-band cavity at room and liquid nitrogen temperatures. We assumed that the power spectrum is Lorenzian and that the integral of the spectrum is equal to the expectation energy of a single degree of freedom. Using the coupling constants, measured with a network analyzer, and the Johnson-Nyquist noise as a reference power level, we evaluated the absolute value of the radiation at room temperature. The measured peak value was almost half the expected value. The disagreement can partly be explained in terms of an equivalent temperature which can be different from the physical temperature. This experiment was made possible through the adoption of a cooled high-electron-mobility-transistor (HEMT) amplifier and parallel band-pass filters.</description><identifier>ISSN: 0021-4922</identifier><identifier>EISSN: 1347-4065</identifier><identifier>DOI: 10.1143/jjap.36.2399</identifier><identifier>CODEN: JJAPA5</identifier><language>eng</language><publisher>Tokyo: Japanese journal of applied physics</publisher><subject>Astronomical and space-research instrumentation ; Astronomy ; Dark matter (stellar, interstellar, galactic, and cosmological) ; Earth, ocean, space ; Exact sciences and technology ; Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations ; Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques</subject><ispartof>Japanese Journal of Applied Physics, 1997-04, Vol.36 (4A), p.2399-2403</ispartof><rights>1997 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c410t-4597cc6487c2146efd23ad046477b5a5b8681cc8e9162bdc4485c661efce39ce3</citedby><cites>FETCH-LOGICAL-c410t-4597cc6487c2146efd23ad046477b5a5b8681cc8e9162bdc4485c661efce39ce3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2696822$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>INAGAKI, S</creatorcontrib><creatorcontrib>EZURA, E</creatorcontrib><creatorcontrib>KOBAYASHI, M</creatorcontrib><creatorcontrib>MORIMOTO, K</creatorcontrib><title>Electromagnetic radiation due to thermal agitation in a D-band cavity</title><title>Japanese Journal of Applied Physics</title><description>At resonant frequencies in a microwave cavity, electromagnetic radiation is induced due to thermal agitation. We investigated the TM
010
mode of a D-band cavity at room and liquid nitrogen temperatures. We assumed that the power spectrum is Lorenzian and that the integral of the spectrum is equal to the expectation energy of a single degree of freedom. Using the coupling constants, measured with a network analyzer, and the Johnson-Nyquist noise as a reference power level, we evaluated the absolute value of the radiation at room temperature. The measured peak value was almost half the expected value. The disagreement can partly be explained in terms of an equivalent temperature which can be different from the physical temperature. This experiment was made possible through the adoption of a cooled high-electron-mobility-transistor (HEMT) amplifier and parallel band-pass filters.</description><subject>Astronomical and space-research instrumentation</subject><subject>Astronomy</subject><subject>Dark matter (stellar, interstellar, galactic, and cosmological)</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations</subject><subject>Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques</subject><issn>0021-4922</issn><issn>1347-4065</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><recordid>eNo9UMtKw0AUHUTBWt35AbNwaeq8cpNZllofpaALXYebm0mdkiZhZhT697ZUXBwOh_NYHMZupZhJafTDdovjTMNMaWvP2ERqU2RGQH7OJkIomRmr1CW7inF7kJAbOWHLZecohWGHm94lTzxg4zH5oefNt-Np4OnLhR12HDc-nQzfc-SPWY19wwl_fNpfs4sWu-hu_njKPp-WH4uXbP32_LqYrzMyUqTM5LYgAlMWpKQB1zZKYyMMmKKoc8zrEkpJVDorQdUNGVPmBCBdS07bA6bs_rRLYYgxuLYag99h2FdSVMcLqtVq_l5pqI4XHOJ3p_iIkbBrA_bk439HgYVSKf0LBQZbng</recordid><startdate>19970401</startdate><enddate>19970401</enddate><creator>INAGAKI, S</creator><creator>EZURA, E</creator><creator>KOBAYASHI, M</creator><creator>MORIMOTO, K</creator><general>Japanese journal of applied physics</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19970401</creationdate><title>Electromagnetic radiation due to thermal agitation in a D-band cavity</title><author>INAGAKI, S ; EZURA, E ; KOBAYASHI, M ; MORIMOTO, K</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c410t-4597cc6487c2146efd23ad046477b5a5b8681cc8e9162bdc4485c661efce39ce3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Astronomical and space-research instrumentation</topic><topic>Astronomy</topic><topic>Dark matter (stellar, interstellar, galactic, and cosmological)</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations</topic><topic>Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>INAGAKI, S</creatorcontrib><creatorcontrib>EZURA, E</creatorcontrib><creatorcontrib>KOBAYASHI, M</creatorcontrib><creatorcontrib>MORIMOTO, K</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Japanese Journal of Applied Physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>INAGAKI, S</au><au>EZURA, E</au><au>KOBAYASHI, M</au><au>MORIMOTO, K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electromagnetic radiation due to thermal agitation in a D-band cavity</atitle><jtitle>Japanese Journal of Applied Physics</jtitle><date>1997-04-01</date><risdate>1997</risdate><volume>36</volume><issue>4A</issue><spage>2399</spage><epage>2403</epage><pages>2399-2403</pages><issn>0021-4922</issn><eissn>1347-4065</eissn><coden>JJAPA5</coden><abstract>At resonant frequencies in a microwave cavity, electromagnetic radiation is induced due to thermal agitation. We investigated the TM
010
mode of a D-band cavity at room and liquid nitrogen temperatures. We assumed that the power spectrum is Lorenzian and that the integral of the spectrum is equal to the expectation energy of a single degree of freedom. Using the coupling constants, measured with a network analyzer, and the Johnson-Nyquist noise as a reference power level, we evaluated the absolute value of the radiation at room temperature. The measured peak value was almost half the expected value. The disagreement can partly be explained in terms of an equivalent temperature which can be different from the physical temperature. This experiment was made possible through the adoption of a cooled high-electron-mobility-transistor (HEMT) amplifier and parallel band-pass filters.</abstract><cop>Tokyo</cop><pub>Japanese journal of applied physics</pub><doi>10.1143/jjap.36.2399</doi><tpages>5</tpages></addata></record> |
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| ispartof | Japanese Journal of Applied Physics, 1997-04, Vol.36 (4A), p.2399-2403 |
| issn | 0021-4922 1347-4065 |
| language | eng |
| recordid | cdi_crossref_primary_10_1143_JJAP_36_2399 |
| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Astronomical and space-research instrumentation Astronomy Dark matter (stellar, interstellar, galactic, and cosmological) Earth, ocean, space Exact sciences and technology Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations Gravitational radiation detectors mass spectrometers and other instrumentation and techniques |
| title | Electromagnetic radiation due to thermal agitation in a D-band cavity |
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