Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure
A gyrotron traveling-wave amplifier (gyro-TWA) with a distributed-loss structure can achieve high gain over a broad bandwidth. In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (∼10 GHz) is designed. The excessive length of the cop...
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| Veröffentlicht in: | AIP advances 2022-05, Vol.12 (5), p.055017-055017-8 |
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| container_end_page | 055017-8 |
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| container_issue | 5 |
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| container_title | AIP advances |
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| creator | Yeh, Yi Sheng Hung, Chien-Lun Chang, Tsun-Hsu |
| description | A gyrotron traveling-wave amplifier (gyro-TWA) with a distributed-loss structure can achieve high gain over a broad bandwidth. In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (∼10 GHz) is designed. The excessive length of the copper section in this gyro-TWA leads to reflective oscillations and absolute instabilities. Reflective oscillations can be suppressed for a gyro-TWA with a high lossy-section resistivity and a short copper section. Absolute instabilities, conversely, can be suppressed for a gyro-TWA with a long lossy section and high lossy-section resistivity. The proposed gyro-TWA has a high lossy-section resistivity, a long lossy section, and a short copper section, which not only avoids mode competition but also achieves the desired characteristics of a high gain and broad-frequency range. For a 12 kV, 0.3 A electron beam, the frequency range of the 250 GHz 10 W level gyro-TWA with a distributed-loss structure, is ∼10 GHz when the input power is between 1 and 10 mW. |
| doi_str_mv | 10.1063/5.0093711 |
| format | Article |
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In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (∼10 GHz) is designed. The excessive length of the copper section in this gyro-TWA leads to reflective oscillations and absolute instabilities. Reflective oscillations can be suppressed for a gyro-TWA with a high lossy-section resistivity and a short copper section. Absolute instabilities, conversely, can be suppressed for a gyro-TWA with a long lossy section and high lossy-section resistivity. The proposed gyro-TWA has a high lossy-section resistivity, a long lossy section, and a short copper section, which not only avoids mode competition but also achieves the desired characteristics of a high gain and broad-frequency range. For a 12 kV, 0.3 A electron beam, the frequency range of the 250 GHz 10 W level gyro-TWA with a distributed-loss structure, is ∼10 GHz when the input power is between 1 and 10 mW.</description><identifier>ISSN: 2158-3226</identifier><identifier>EISSN: 2158-3226</identifier><identifier>DOI: 10.1063/5.0093711</identifier><identifier>CODEN: AAIDBI</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Amplification ; Copper ; Copper converters ; Cyclotron resonance devices ; Electrical resistivity ; Electron beams ; Frequency ranges ; High gain ; Oscillations ; Traveling wave amplifiers ; Traveling waves</subject><ispartof>AIP advances, 2022-05, Vol.12 (5), p.055017-055017-8</ispartof><rights>Author(s)</rights><rights>2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c428t-7a6754a45247ae85f9a812f290e6925954a89c88ffd51c5e2379e87f3a104ac53</citedby><cites>FETCH-LOGICAL-c428t-7a6754a45247ae85f9a812f290e6925954a89c88ffd51c5e2379e87f3a104ac53</cites><orcidid>0000-0003-0069-8878 ; 0000-0003-2501-3185 ; 0000-0003-1198-188X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,860,2096,27901,27902</link.rule.ids></links><search><creatorcontrib>Yeh, Yi Sheng</creatorcontrib><creatorcontrib>Hung, Chien-Lun</creatorcontrib><creatorcontrib>Chang, Tsun-Hsu</creatorcontrib><title>Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure</title><title>AIP advances</title><description>A gyrotron traveling-wave amplifier (gyro-TWA) with a distributed-loss structure can achieve high gain over a broad bandwidth. In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (∼10 GHz) is designed. The excessive length of the copper section in this gyro-TWA leads to reflective oscillations and absolute instabilities. Reflective oscillations can be suppressed for a gyro-TWA with a high lossy-section resistivity and a short copper section. Absolute instabilities, conversely, can be suppressed for a gyro-TWA with a long lossy section and high lossy-section resistivity. The proposed gyro-TWA has a high lossy-section resistivity, a long lossy section, and a short copper section, which not only avoids mode competition but also achieves the desired characteristics of a high gain and broad-frequency range. For a 12 kV, 0.3 A electron beam, the frequency range of the 250 GHz 10 W level gyro-TWA with a distributed-loss structure, is ∼10 GHz when the input power is between 1 and 10 mW.</description><subject>Amplification</subject><subject>Copper</subject><subject>Copper converters</subject><subject>Cyclotron resonance devices</subject><subject>Electrical resistivity</subject><subject>Electron beams</subject><subject>Frequency ranges</subject><subject>High gain</subject><subject>Oscillations</subject><subject>Traveling wave amplifiers</subject><subject>Traveling waves</subject><issn>2158-3226</issn><issn>2158-3226</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>DOA</sourceid><recordid>eNqdkc1u1DAQxyMEElXpgTeIxAmkFH8m9hEqaCtV4gJna9YeL15l4zBxuto-Dc_Ck2HYCjgzF489v_l7PprmJWeXnPXyrb5kzMqB8yfNmeDadFKI_uk__vPmYll2rJqynBl11pT3lCF0kfDbipM_tgTTFtscW2iFZj--X988tHsMad13cz4gtdsj5UJ5agvBPY5p2naH6rSwn8cUUyUOqXyt6SEthdJmLRi6MS9LW6-rLyvhi-ZZhHHBi8fzvPny8cPnq5vu7tP17dW7u84rYUo3QD9oBUoLNQAaHS0YLqKwDHsrtK0xY70xMQbNvUYhB4tmiBI4U-C1PG9uT7ohw87NlPZAR5chud8PmbYOqCQ_ootxI9GisANaFYTcyOgVAx5hE7g1pmq9OmnNlOuoluJ2eaWplu9E30tmWa2pUq9PlKfaMWH88ytn7teOnHaPO6rsmxO7-FSgpDz9H3yf6S_o5hDlTxpRoGw</recordid><startdate>20220501</startdate><enddate>20220501</enddate><creator>Yeh, Yi Sheng</creator><creator>Hung, Chien-Lun</creator><creator>Chang, Tsun-Hsu</creator><general>American Institute of Physics</general><general>AIP Publishing LLC</general><scope>AJDQP</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0003-0069-8878</orcidid><orcidid>https://orcid.org/0000-0003-2501-3185</orcidid><orcidid>https://orcid.org/0000-0003-1198-188X</orcidid></search><sort><creationdate>20220501</creationdate><title>Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure</title><author>Yeh, Yi Sheng ; Hung, Chien-Lun ; Chang, Tsun-Hsu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c428t-7a6754a45247ae85f9a812f290e6925954a89c88ffd51c5e2379e87f3a104ac53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Amplification</topic><topic>Copper</topic><topic>Copper converters</topic><topic>Cyclotron resonance devices</topic><topic>Electrical resistivity</topic><topic>Electron beams</topic><topic>Frequency ranges</topic><topic>High gain</topic><topic>Oscillations</topic><topic>Traveling wave amplifiers</topic><topic>Traveling waves</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yeh, Yi Sheng</creatorcontrib><creatorcontrib>Hung, Chien-Lun</creatorcontrib><creatorcontrib>Chang, Tsun-Hsu</creatorcontrib><collection>AIP Open Access Journals</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>AIP advances</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yeh, Yi Sheng</au><au>Hung, Chien-Lun</au><au>Chang, Tsun-Hsu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure</atitle><jtitle>AIP advances</jtitle><date>2022-05-01</date><risdate>2022</risdate><volume>12</volume><issue>5</issue><spage>055017</spage><epage>055017-8</epage><pages>055017-055017-8</pages><issn>2158-3226</issn><eissn>2158-3226</eissn><coden>AAIDBI</coden><abstract>A gyrotron traveling-wave amplifier (gyro-TWA) with a distributed-loss structure can achieve high gain over a broad bandwidth. In this study, a low-voltage, low-current subterahertz gyro-TWA with medium power (∼10 W) over a broad-frequency range (∼10 GHz) is designed. The excessive length of the copper section in this gyro-TWA leads to reflective oscillations and absolute instabilities. Reflective oscillations can be suppressed for a gyro-TWA with a high lossy-section resistivity and a short copper section. Absolute instabilities, conversely, can be suppressed for a gyro-TWA with a long lossy section and high lossy-section resistivity. The proposed gyro-TWA has a high lossy-section resistivity, a long lossy section, and a short copper section, which not only avoids mode competition but also achieves the desired characteristics of a high gain and broad-frequency range. For a 12 kV, 0.3 A electron beam, the frequency range of the 250 GHz 10 W level gyro-TWA with a distributed-loss structure, is ∼10 GHz when the input power is between 1 and 10 mW.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/5.0093711</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-0069-8878</orcidid><orcidid>https://orcid.org/0000-0003-2501-3185</orcidid><orcidid>https://orcid.org/0000-0003-1198-188X</orcidid><oa>free_for_read</oa></addata></record> |
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| source | DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Amplification Copper Copper converters Cyclotron resonance devices Electrical resistivity Electron beams Frequency ranges High gain Oscillations Traveling wave amplifiers Traveling waves |
| title | Broad-frequency range of a 250 GHz medium-power gyrotron traveling-wave amplifier with a distributed-loss structure |
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