4X SOURCE.

被引：0
|
作者：
Smith Jr., H.Vernon [1 ]
Allison, Paul [1 ]
Sherman, Joseph D. [1 ]
机构：
[1] Los Alamos Natl Lab, NM, USA, Los Alamos Natl Lab, NM, USA
来源：
IEEE Transactions on Nuclear Science | 1985年 / NS-32卷 / 05期
关键词：
ELECTRIC ARCS - ELECTRIC DISCHARGES - MAGNETIC FIELDS;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A 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 arcs ( APP GRTH 20% H- current fluctuations) and one with a quiescent arc ( APP GRTH 1% H- current fluctuations). Lower arc magnetic field and higher H//2 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 multiplied by 0. 018 pi -cm-mrad. The quiescent mode yields 75 mA of 29-keV (H- beam; for 67 mA at 24 keV, the emittance is 0. 011 multiplied by 0. 012 pi -cm-mrad.
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