Radiation growth in a millimeter‐wave free‐electron laser operating in the collective regime
Frequency‐resolved measurements of radiation growth have been performed on a millimeter‐wave free‐electron laser using an intense relativistic electron beam. These measurements have shown large radiation growth rates (approximately 2 dB/cm) over a broad instantaneous bandwidth (66–90 GHz), in good a...
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| Veröffentlicht in: | Phys. Fluids; (United States) 1984-03, Vol.27 (3), p.746-754 |
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| container_end_page | 754 |
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| container_title | Phys. Fluids; (United States) |
| container_volume | 27 |
| creator | Gold, S. H. Black, W. M. Freund, H. P. Granatstein, V. L. Kinkead, A. K. |
| description | Frequency‐resolved measurements of radiation growth have been performed on a millimeter‐wave free‐electron laser using an intense relativistic electron beam. These measurements have shown large radiation growth rates (approximately 2 dB/cm) over a broad instantaneous bandwidth (66–90 GHz), in good agreement with predictions of theory for operation in the collective regime. Growth narrowing and saturation effects have also been observed. In addition, a large increase in experimental power and efficiency has been observed to result from tapering the strength of the axial magnetic field in the sense that compensates for kinetic energy extraction from the electron beam. Direct calorimetric measurements indicate the production of ≳75 MW centered at 75 GHz with 6% experimental efficiency. |
| doi_str_mv | 10.1063/1.864650 |
| format | Article |
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H.</creatorcontrib><creatorcontrib>Black, W. M.</creatorcontrib><creatorcontrib>Freund, H. P.</creatorcontrib><creatorcontrib>Granatstein, V. L.</creatorcontrib><creatorcontrib>Kinkead, A. K.</creatorcontrib><creatorcontrib>Naval Research Laboratory, Washington, DC 20375</creatorcontrib><title>Radiation growth in a millimeter‐wave free‐electron laser operating in the collective regime</title><title>Phys. Fluids; (United States)</title><description>Frequency‐resolved measurements of radiation growth have been performed on a millimeter‐wave free‐electron laser using an intense relativistic electron beam. These measurements have shown large radiation growth rates (approximately 2 dB/cm) over a broad instantaneous bandwidth (66–90 GHz), in good agreement with predictions of theory for operation in the collective regime. Growth narrowing and saturation effects have also been observed. In addition, a large increase in experimental power and efficiency has been observed to result from tapering the strength of the axial magnetic field in the sense that compensates for kinetic energy extraction from the electron beam. Direct calorimetric measurements indicate the production of ≳75 MW centered at 75 GHz with 6% experimental efficiency.</description><subject>420300 - Engineering- Lasers- (-1989)</subject><subject>CALORIMETRY</subject><subject>CORRELATIONS</subject><subject>ELECTROMAGNETIC RADIATION</subject><subject>ENERGY RANGE</subject><subject>ENGINEERING</subject><subject>Exact sciences and technology</subject><subject>FREE ELECTRON LASERS</subject><subject>FREQUENCY RANGE</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>GHZ RANGE</subject><subject>GHZ RANGE 01-100</subject><subject>LASER RADIATION</subject><subject>LASERS</subject><subject>Optics</subject><subject>Physics</subject><subject>POWER</subject><subject>RADIATIONS</subject><subject>RELATIVISTIC RANGE</subject><subject>RESOLUTION</subject><subject>SATURATION</subject><issn>0031-9171</issn><issn>2163-4998</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1984</creationdate><recordtype>article</recordtype><recordid>eNp1kctKAzEUhoMoWKvgIwwiooupyWQuyVKKNygIouuYSc-0kcykJqnFnY_gM_okZpziztU5i-__OPwHoWOCJwSX9JJMWJmXBd5Bo4yUNM05Z7tohDElKScV2UcH3r9inOUkpyP08ijnWgZtu2Th7CYsE90lMmm1MbqFAO7782sj3yFpHEDcwYAKLtJGenCJXYGL6W7Rx8ISEmVNT-iYcLCIikO010jj4Wg7x-j55vppepfOHm7vp1ezVOUkC2kGvC6gqBiVmNZ1zjBTJGNFU_M5qwkDntGCAy5rVVNOq7JhGGhBFRACZV3RMToZvNYHLbzSAdRS2a6L14gC57yM7YzR2QCtnH1bgw-i1V6BMbIDu_Yiy2lVUEYjeD6AylnvHTRi5XQr3YcgWPQ9CyKGniN6unVKr6RpnOyU9n88Y_EDtDdeDFh_2m_h_yt_AE9pi1A</recordid><startdate>198403</startdate><enddate>198403</enddate><creator>Gold, S. 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H.</creatorcontrib><creatorcontrib>Black, W. M.</creatorcontrib><creatorcontrib>Freund, H. P.</creatorcontrib><creatorcontrib>Granatstein, V. L.</creatorcontrib><creatorcontrib>Kinkead, A. K.</creatorcontrib><creatorcontrib>Naval Research Laboratory, Washington, DC 20375</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Phys. Fluids; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gold, S. H.</au><au>Black, W. M.</au><au>Freund, H. P.</au><au>Granatstein, V. L.</au><au>Kinkead, A. K.</au><aucorp>Naval Research Laboratory, Washington, DC 20375</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Radiation growth in a millimeter‐wave free‐electron laser operating in the collective regime</atitle><jtitle>Phys. Fluids; (United States)</jtitle><date>1984-03</date><risdate>1984</risdate><volume>27</volume><issue>3</issue><spage>746</spage><epage>754</epage><pages>746-754</pages><issn>0031-9171</issn><eissn>2163-4998</eissn><coden>PFLDAS</coden><abstract>Frequency‐resolved measurements of radiation growth have been performed on a millimeter‐wave free‐electron laser using an intense relativistic electron beam. These measurements have shown large radiation growth rates (approximately 2 dB/cm) over a broad instantaneous bandwidth (66–90 GHz), in good agreement with predictions of theory for operation in the collective regime. Growth narrowing and saturation effects have also been observed. In addition, a large increase in experimental power and efficiency has been observed to result from tapering the strength of the axial magnetic field in the sense that compensates for kinetic energy extraction from the electron beam. Direct calorimetric measurements indicate the production of ≳75 MW centered at 75 GHz with 6% experimental efficiency.</abstract><cop>Woodbury, NY</cop><pub>American Institute of Physics</pub><doi>10.1063/1.864650</doi><tpages>9</tpages></addata></record> |
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| identifier | ISSN: 0031-9171 |
| ispartof | Phys. Fluids; (United States), 1984-03, Vol.27 (3), p.746-754 |
| issn | 0031-9171 2163-4998 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_24375383 |
| source | Alma/SFX Local Collection |
| subjects | 420300 - Engineering- Lasers- (-1989) CALORIMETRY CORRELATIONS ELECTROMAGNETIC RADIATION ENERGY RANGE ENGINEERING Exact sciences and technology FREE ELECTRON LASERS FREQUENCY RANGE Fundamental areas of phenomenology (including applications) GHZ RANGE GHZ RANGE 01-100 LASER RADIATION LASERS Optics Physics POWER RADIATIONS RELATIVISTIC RANGE RESOLUTION SATURATION |
| title | Radiation growth in a millimeter‐wave free‐electron laser operating in the collective regime |
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