Linac for ion beam acceleration

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 (8A) of said first accelerating structure is the input of a pre-accelerated, collimated and focused ion beam, and a second external extremity (8B) is the output of the higher energy ion beam,
• ii) an interposed coupling structure (9), or if necessary a modified coupling structure (9A) 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 (8C) 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.