Calculating the self-matched ion beam evolution in a linac section with spatially uniform qUadrupolar focusing

The algorithm and results of simulation of proton beam evolution in a linac section with spatially uniform quadrupolar focusing are described. Calculations are performed on the 1060 computer. The effect of the external electric and the proper beam fields is taken into accoupt. The obtained results show that losses for a model bunch with charge of 4.01 nCoul simulated by 1400 macroparticles at the 400 cm long section without the proper bunch field account are 15.5% and those with the proper bunch field account amount to 26.79%. When the s.ame bunch is represented by 2800 macroparticles the good coincidence in the charge distributions along the Z axis, as well as in the values of losses is observed