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Cathode effects on a relativistic magnetron driven by a microsecond e-beam accelerator
Experiments have been performed on a relativistic magnetron driven at e-beam accelerator peak parameters: voltage = -0.4 MV, current = 16 kA, and pulselength = 0.5 /spl mu/s. The magnetron is a six-vane device operating at about 1 GHz with extraction from two cavities. For equal power in both extrac...
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| Published in: | IEEE transactions on plasma science 2002-06, Vol.30 (3), p.947-955 |
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| container_end_page | 955 |
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| container_title | IEEE transactions on plasma science |
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| creator | Lopez, M.R. Gilgenbach, R.M. Jordan, D.W. Anderson, S.A. Johnston, M.D. Keyser, M.W. Miyake, H. Peters, C.W. Jones, M.C. Bogdan Neculaes, V. Yue Ying Lau Spencer, T.A. Luginsland, J.W. Haworth, M.D. Lemke, R.W. Price, D. |
| description | Experiments have been performed on a relativistic magnetron driven at e-beam accelerator peak parameters: voltage = -0.4 MV, current = 16 kA, and pulselength = 0.5 /spl mu/s. The magnetron is a six-vane device operating at about 1 GHz with extraction from two cavities. For equal power in both extraction waveguides, the peak microwave power of this device is between 200 and 300 MW. Microwave pulse-shortening limits pulselengths to the range of 10-100 ns. Time-frequency analysis of microwave emission indicates operation at about 1.03 GHz, close to the pi mode frequency identified from cold tests and the three-dimensional MAGIC code. Two cold cathodes were tested: 1) an emitting aluminum knob in the vane region with no endcap and 2) an extended cathode with a graphite fiber emission region in the vanes and endcap outside the vanes. Electron endloss current has been measured for the two cathodes. With no endcap, the cathode exhibited endloss current fraction up to 50% of the total; with one endcap, the cathode reduced the endloss current fraction to as little as 12%. Both cathodes produced peak total-electronic efficiency in the range of 14%-21%. |
| doi_str_mv | 10.1109/TPS.2002.801543 |
| format | article |
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The magnetron is a six-vane device operating at about 1 GHz with extraction from two cavities. For equal power in both extraction waveguides, the peak microwave power of this device is between 200 and 300 MW. Microwave pulse-shortening limits pulselengths to the range of 10-100 ns. Time-frequency analysis of microwave emission indicates operation at about 1.03 GHz, close to the pi mode frequency identified from cold tests and the three-dimensional MAGIC code. Two cold cathodes were tested: 1) an emitting aluminum knob in the vane region with no endcap and 2) an extended cathode with a graphite fiber emission region in the vanes and endcap outside the vanes. Electron endloss current has been measured for the two cathodes. With no endcap, the cathode exhibited endloss current fraction up to 50% of the total; with one endcap, the cathode reduced the endloss current fraction to as little as 12%. Both cathodes produced peak total-electronic efficiency in the range of 14%-21%.</description><identifier>ISSN: 0093-3813</identifier><identifier>EISSN: 1939-9375</identifier><identifier>DOI: 10.1109/TPS.2002.801543</identifier><identifier>CODEN: ITPSBD</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Acceleration ; Accelerator magnets ; Accelerators ; Aluminum ; Blades ; Cathodes ; Devices ; Electric potential ; Extraction ; Instruments ; Magnetic devices ; Microwave devices ; Microwaves ; Particle physics ; Testing ; Time frequency analysis ; Vanes ; Voltage</subject><ispartof>IEEE transactions on plasma science, 2002-06, Vol.30 (3), p.947-955</ispartof><rights>Copyright Institute of Electrical and Electronics Engineers, Inc. (IEEE) Jun 2002</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c411t-485754a15796799b034ef92948805a9f1890cb1d989932b5243702004729b9213</citedby><cites>FETCH-LOGICAL-c411t-485754a15796799b034ef92948805a9f1890cb1d989932b5243702004729b9213</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/1158329$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>315,786,790,27957,27958,55147</link.rule.ids></links><search><creatorcontrib>Lopez, M.R.</creatorcontrib><creatorcontrib>Gilgenbach, R.M.</creatorcontrib><creatorcontrib>Jordan, D.W.</creatorcontrib><creatorcontrib>Anderson, S.A.</creatorcontrib><creatorcontrib>Johnston, M.D.</creatorcontrib><creatorcontrib>Keyser, M.W.</creatorcontrib><creatorcontrib>Miyake, H.</creatorcontrib><creatorcontrib>Peters, C.W.</creatorcontrib><creatorcontrib>Jones, M.C.</creatorcontrib><creatorcontrib>Bogdan Neculaes, V.</creatorcontrib><creatorcontrib>Yue Ying Lau</creatorcontrib><creatorcontrib>Spencer, T.A.</creatorcontrib><creatorcontrib>Luginsland, J.W.</creatorcontrib><creatorcontrib>Haworth, M.D.</creatorcontrib><creatorcontrib>Lemke, R.W.</creatorcontrib><creatorcontrib>Price, D.</creatorcontrib><title>Cathode effects on a relativistic magnetron driven by a microsecond e-beam accelerator</title><title>IEEE transactions on plasma science</title><addtitle>TPS</addtitle><description>Experiments have been performed on a relativistic magnetron driven at e-beam accelerator peak parameters: voltage = -0.4 MV, current = 16 kA, and pulselength = 0.5 /spl mu/s. The magnetron is a six-vane device operating at about 1 GHz with extraction from two cavities. For equal power in both extraction waveguides, the peak microwave power of this device is between 200 and 300 MW. Microwave pulse-shortening limits pulselengths to the range of 10-100 ns. Time-frequency analysis of microwave emission indicates operation at about 1.03 GHz, close to the pi mode frequency identified from cold tests and the three-dimensional MAGIC code. Two cold cathodes were tested: 1) an emitting aluminum knob in the vane region with no endcap and 2) an extended cathode with a graphite fiber emission region in the vanes and endcap outside the vanes. Electron endloss current has been measured for the two cathodes. With no endcap, the cathode exhibited endloss current fraction up to 50% of the total; with one endcap, the cathode reduced the endloss current fraction to as little as 12%. Both cathodes produced peak total-electronic efficiency in the range of 14%-21%.</description><subject>Acceleration</subject><subject>Accelerator magnets</subject><subject>Accelerators</subject><subject>Aluminum</subject><subject>Blades</subject><subject>Cathodes</subject><subject>Devices</subject><subject>Electric potential</subject><subject>Extraction</subject><subject>Instruments</subject><subject>Magnetic devices</subject><subject>Microwave devices</subject><subject>Microwaves</subject><subject>Particle physics</subject><subject>Testing</subject><subject>Time frequency analysis</subject><subject>Vanes</subject><subject>Voltage</subject><issn>0093-3813</issn><issn>1939-9375</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNqNkctr20AQxpfQQFwn5xxyET20Jzkz-_DuHItJ00IggTyuy0oepQqWlO7KBv_3WaNAoYe2pznM75vH9wlxjrBABLp8uLtfSAC5cIBGqyMxQ1JUkrLmg5gBkCqVQ3UiPqb0AoDagJyJp1UYfw5rLrhpuB5TMfRFKCJvwtju2jS2ddGF557HmBvr2O64L6p9Rrq2jkPieujXBZcVh64Idc0bjmEc4qk4bsIm8dl7nYvHb1cPq-_lze31j9XXm7LWiGOpnbFGBzSWlpaoAqW5IUnaOTCBGnQEdYVrckRKVkZqZSE_qa2kiiSqufgyzX2Nw68tp9F3bcpXbELPwzZ5AkvGUdbNxee_ktJZrdHCf4Ayr0f7b9CCQ6llBj_9Ab4M29hnXzySwSUtJWXocoIOtqbIjX-NbRfi3iP4Q8A-B-wPAfsp4Ky4mBQtM_-m0TiV570BUkadwQ</recordid><startdate>20020601</startdate><enddate>20020601</enddate><creator>Lopez, M.R.</creator><creator>Gilgenbach, R.M.</creator><creator>Jordan, D.W.</creator><creator>Anderson, S.A.</creator><creator>Johnston, M.D.</creator><creator>Keyser, M.W.</creator><creator>Miyake, H.</creator><creator>Peters, C.W.</creator><creator>Jones, M.C.</creator><creator>Bogdan Neculaes, V.</creator><creator>Yue Ying Lau</creator><creator>Spencer, T.A.</creator><creator>Luginsland, J.W.</creator><creator>Haworth, M.D.</creator><creator>Lemke, R.W.</creator><creator>Price, D.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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The magnetron is a six-vane device operating at about 1 GHz with extraction from two cavities. For equal power in both extraction waveguides, the peak microwave power of this device is between 200 and 300 MW. Microwave pulse-shortening limits pulselengths to the range of 10-100 ns. Time-frequency analysis of microwave emission indicates operation at about 1.03 GHz, close to the pi mode frequency identified from cold tests and the three-dimensional MAGIC code. Two cold cathodes were tested: 1) an emitting aluminum knob in the vane region with no endcap and 2) an extended cathode with a graphite fiber emission region in the vanes and endcap outside the vanes. Electron endloss current has been measured for the two cathodes. With no endcap, the cathode exhibited endloss current fraction up to 50% of the total; with one endcap, the cathode reduced the endloss current fraction to as little as 12%. Both cathodes produced peak total-electronic efficiency in the range of 14%-21%.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TPS.2002.801543</doi><tpages>9</tpages></addata></record> |
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| identifier | ISSN: 0093-3813 |
| ispartof | IEEE transactions on plasma science, 2002-06, Vol.30 (3), p.947-955 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) Journals |
| subjects | Acceleration Accelerator magnets Accelerators Aluminum Blades Cathodes Devices Electric potential Extraction Instruments Magnetic devices Microwave devices Microwaves Particle physics Testing Time frequency analysis Vanes Voltage |
| title | Cathode effects on a relativistic magnetron driven by a microsecond e-beam accelerator |
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