7Fink Y,Chen C,Marable W P. Halo formation and chaos in root-mean-square matched beams propagating through a periodic solenoidal focusing channel [J]. Phys Rev E, 1997,55 (6):. 7557-7564.
8Chen C,Davidson R C. Nonlinear resonances and chaotic behavior in a periodically focused intense charged-particle beam[J]. Phy Rev Lett, 1994,72(14) : 2195-2198.
9Allen C K,Chan K C D,Colestock P L. Beam-halo measurements in high-current proton beams [J]. Phys Rev Lett ,2002,89(21):214802-1-4.
10LAGNIEL J M. On halo formation from space-charge dominated beam[J]. Nucl Instr and Meth Phys Rev A, 1994, 345:46-53.
