Patent ID: 6888326

Claim:
Linac for ion beam acceleration, characterised by the fact of comprising: i) at least one couple of a first and a second accelerating structure ( 8 ) aligned on the same axis, resonating on a H-type standing wave electromagnetic field, each one housing a plurality of coaxial drift tubes ( 15 ), supported by stems and reciprocally separated to form a respective gap ( 20 ) accelerating the ion beam, where a first external extremity ( 8 A) of said first accelerating structure is the input of a pre-accelerated, collimated and focused ion beam, and a second external extremity ( 8 B) is the output of the higher energy ion beam, ii) an interposed coupling structure ( 9 ), or if necessary a modified coupling structure ( 9 A) to be connected to an RF power generator ( 11 ), acting as a bridge for the RE power flow between adjacent accelerating structures ( 8 ), coaxial, resonating in a standing wave TEM-type cavity mode, composed of two coaxial cylinders, if necessary linked to a vacuum system ( 13 ) and including, if necessary, one or more quadrupoles ( 18 ), whose length is appropriate to maintain synchronism of the acceleration, being linked to said first and second accelerating structures ( 8 ), with their respective internal extremity ( 8 C) through annular terminations ( 10 ), present at both extremities of said accelerating structures ( 8 ) and allowing the regulation of the electromagnetic field on the axis of each said accelerating gap ( 20 ), iii) wherein a working frequency is superior to 100 MHz.