High-brightness, high-current ion sources Page: 4 of 16
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MAGNET
SUPPORT
Fig. 2. "Penning" high-current 1on source.4
Hultlcusp Sources
With the availability of strong permanent magnets, multicusp
discharges are more and more being used to create the plasma needed
for high-current sources. The discharge vessel 1s surrounded by
magnets with alternating polarity, creating a m1n1mum-B
configuration that yields a stable plasma confinement over many
decades of plasma density.* The rear source side may be
protected by magnets (F1g. 3) or biased,’ depending mostly on
technical considerations. The multicusp sources, 1n general, offer
the highest versatility whenever a wide range of ton species, beam
Intensity, and beam quality 1s to be provided by one basic source
type and when other features like gas- and power-efficiency or
Ionization degree are of minor Importance.
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Keller, R. High-brightness, high-current ion sources, article, January 1, 1985; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1093421/m1/4/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.