[n] V. G. Dudnikov, C. M. Ankenbrandt, R. P. Johnson, and L. G. Vorobiev, “Beam Brightness Booster with Ionization Cooling of Superintense Circulating Beams”, in Proc. NAPAC'13, Pasadena, CA, USA, Sep.-Oct. 2013, paper MOPAC26, pp. 123-125.
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