Producing persistent, high-current, high-duty-factor H− beams for routine 1 MW operation of Spallation Neutron Source (invited)a
Since 2009, the Spallation Neutron Source (SNS) has been producing neutrons with ion beam powers near 1 MW, which requires the extraction of ∼50 mA H− ions from the ion source with a ∼5% duty factor. The 50 mA are achieved after an initial dose of ∼3 mg of Cs and heating the Cs collar to ∼170 °C. Th...
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| Veröffentlicht in: | Review of scientific instruments 2012-02, Vol.83 (2), p.02A732-02A732-7 |
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| container_issue | 2 |
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| container_title | Review of scientific instruments |
| container_volume | 83 |
| creator | Stockli, Martin P. Han, B. X. Hardek, T. W. Kang, Y. W. Murray, S. N. Pennisi, T. R. Piller, C. Santana, M. Welton, R. |
| description | Since 2009, the Spallation Neutron Source (SNS) has been producing neutrons with ion beam powers near 1 MW, which requires the extraction of ∼50 mA H− ions from the ion source with a ∼5% duty factor. The 50 mA are achieved after an initial dose of ∼3 mg of Cs and heating the Cs collar to ∼170 °C. The 50 mA normally persist for the entire 4-week source service cycles. Fundamental processes are reviewed to elucidate the persistence of the SNS H− beams without a steady feed of Cs and why the Cs collar temperature may have to be kept near 170 °C. |
| doi_str_mv | 10.1063/1.3681921 |
| format | Article |
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R.</au><au>Piller, C.</au><au>Santana, M.</au><au>Welton, R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Producing persistent, high-current, high-duty-factor H− beams for routine 1 MW operation of Spallation Neutron Source (invited)a</atitle><jtitle>Review of scientific instruments</jtitle><addtitle>Rev Sci Instrum</addtitle><date>2012-02-01</date><risdate>2012</risdate><volume>83</volume><issue>2</issue><spage>02A732</spage><epage>02A732-7</epage><pages>02A732-02A732-7</pages><issn>0034-6748</issn><eissn>1089-7623</eissn><coden>RSINAK</coden><abstract>Since 2009, the Spallation Neutron Source (SNS) has been producing neutrons with ion beam powers near 1 MW, which requires the extraction of ∼50 mA H− ions from the ion source with a ∼5% duty factor. The 50 mA are achieved after an initial dose of ∼3 mg of Cs and heating the Cs collar to ∼170 °C. The 50 mA normally persist for the entire 4-week source service cycles. Fundamental processes are reviewed to elucidate the persistence of the SNS H− beams without a steady feed of Cs and why the Cs collar temperature may have to be kept near 170 °C.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><pmid>22380241</pmid><doi>10.1063/1.3681921</doi><tpages>7</tpages></addata></record> |
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| ispartof | Review of scientific instruments, 2012-02, Vol.83 (2), p.02A732-02A732-7 |
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| language | eng |
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| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | BEAM CURRENTS Beams (radiation) CESIUM Collars DOSES Extraction Heating HYDROGEN IONS 1 MINUS ION BEAMS ION SOURCES NEUTRON SOURCES PARTICLE ACCELERATORS SPALLATION TIN SULFIDES |
| title | Producing persistent, high-current, high-duty-factor H− beams for routine 1 MW operation of Spallation Neutron Source (invited)a |
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