Variant of the accelerating and focusing structure of the high current light ion linear accelerator

摘要

In the paper, the IH structure for He+ beam with the injection energy of 30 keV/u and A/q=4 is presented. Focusingudof He+ beam is performed with the method of alternating phase focusing with the stepped changing synchronousudphase along the focusing period. In order to increase the beam capture coefficient into the mode of acceleration theudincreasing field is applied in the initial part of the structure. The elements of the accelerating structure were calculatedudwith the LINACV2 code; ion beam dynamics was calculated with Poisson Superfish and PARMELA codes.udThe limiting accelerated current is 11.5 mA with injection current 60 mA.