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- A.D. Stepanov, R.C. Davidson, E.P. Gilson, L. Grisham, I. Kaganovich
PPPL, Princeton, New Jersey, USA
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The Princeton Advanced Test Stand (PATS) is currently being developed as a compact experimental facility for studying the physics of high perveance ion beams, beam-plasma interactions, and volume plasma sources for use on the Neutralized Drift Compression Experiments NDCX-I/II. PATS consists of a six-foot-long vacuum chamber with numerous ports for diagnostic access and a pulsed capacitor bank and switching network capable of generating 100 keV ion beams. This results in a flexible system for performing experiments on beam neutralization by volume plasma relevant to NDCX-I/II. The PATS beamline will include an aluminosilicate source for producing a K+ beam, focusing optics, a ferroelectric plasma source (FEPS) and diagnostics including Faraday cups, Langmuir probes, and emittance scanners. Planned experiments include studying beam propagation through a tenuous plasma (np < nb). This regime is relevant to final stages of neutralized drift compression when the beam density begins to exceed the plasma density. The experiment will investigate charge neutralization efficiency, effects of plasma presence on beam emittance, and collective instabilities.
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