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2. Complete Pelletron Systems for Ion Beam Analysis, https://www.pelletron.com/wp-content/uploads/2016/09/COMPLETE-IBA-SYSTEM-Handout.pdf.
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4. National Electrostatics Corporation, 7540 Graber Road, P.O. Box 620310, Middleton, WI 53562, USA. nec@pelletron.com. (608) 831–7600.
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