Testing of an advanced ‘‘volume’’ H− source and preaccelerator
- 1 June 1991
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 62 (6) , 1521-1526
- https://doi.org/10.1063/1.1142480
Abstract
In testing a cesiated volume‐production negative ion source, we have obtained 75 mA of H− beam current in a 270 ms pulse length delivered downstream of the 87 keV preaccelerator. Optimum pressure in the source was less than 8 mT and the electron‐to‐ion ratio in the beam was less than 4. With future improvements in the electron trap, it is anticipated that higher H− current can be obtained by operating with a higher discharge power and a lower plasma electrode bias.Keywords
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