[n] J. Lewellen et al., “Report From Working Group 1 - Injectors, Guns, & Cathodes - RF and SRF Guns”, in Proc. ERL'09, Ithaca, NY, USA, Jun. 2009, paper WG103, pp. 24-36.
[n] R. J. Slobodrian et al., “Intense Polarized 3He Ion Source”, in Proc. PAC'85, Vancouver, Canada, May 1985, pp. 1835-1838.
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