The 4X Source
The 4X Source
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4X 源
DOI:
10.1109/tns.1985.4333727
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发表时间:
1985
影响因子:
1.8
通讯作者:
Joseph D. Sherman
中科院分区:
文献类型:
--
作者:
H. Vernon Smith;P. Allison;Joseph D. Sherman
Our Penning surface-plasma source (SPS) discharge chamber was enlarged 4X in two dimensions. To date, three pulsed discharge modes have been studied: two with noisy arc (¿20% H- current fluctuations) and one with quiescent arc (¿1% H- current fluctuations). Lower arc magnetic field and higher H2 gas flow allow switching from the noisy to the quiescent mode. The noisy modes yield up to 120 mA of 29-keV H- beam; for 110 mA at 29 keV, the two-dimensional normalized rms emittance is 0.017 x 0.018 ¿·cm·mrad. The quiescent mode yields 75 mA of 29-keV H- beam; for 67 mA at 24 keV, the emittance is 0.011 x 0.012 ¿·cm·mrad.