A drift tube (15) linear accelerator (linac) (4) that can be used for the acceleration of low energy ion beams is disclosed. The particles enter the linac (4) at low energy and are accelerated and focused along a straight line in a plurality of resonant accelerating structures (8) interposed by coupling structures (9) up to the desired energy, for instance for therapeutic needs. In the accelerating structures (8), excited by an H-type resonant electromagnetic field, a plurality of accelerating gaps (20) is provided between said drift tubes (15), said drift tubes being supported by stems, for instance alternatively horizontally (16) and vertically (17) disposed. A basic module (7) is disclosed, composed of two accelerating structures (8) and an interposed coupling structure (9), or if necessary a modified coupling structure (9A) connected to a RF power generator (11), being linked if necessary to a vacuum system (13 ) and equipped if necessary with one or more quadrupoles (18). Said basic module (7) can be expanded to get modules (7A) that present an odd number n of coupling structures (9, 9A) which still if necessary are equipped with one or more quadrupoles (18), and an even number N = n + 1 of accelerating structures (8). The proposed linac (4) contains one or more modules (7, 7A) and allows obtaining a large accelerating gradient and a very compact structure.
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机译：公开了一种可用于低能离子束加速的漂移管（15）线性加速器（直线加速器）（4）。粒子以低能量进入直线加速器（4），并沿直线加速并聚焦在由耦合结构（9）插入的多个共振加速结构（8）中，直至达到所需的能量，例如用于治疗需求。在由H型共振电磁场激励的加速结构（8）中，在所述漂移管（15）之间设有多个加速间隙（20），所述漂移管由杆支撑，例如水平地（16）支撑。 ）并垂直放置（17）。公开了一种基本模块（7），其由两个加速结构（8）和插入的耦合结构（9）组成，或者如果需要的话，连接至RF功率发生器（11）的改进的耦合结构（9A），如果需要的话，被链接到真空系统（13），并在必要时配备一个或多个四极杆（18）。所述基本模块（7）可以被扩展以得到具有奇数个耦合结构（9、9A）的模块（7A），如果需要的话，耦合结构（9、9A）仍配备有一个或多个四极（18），偶数N ＝ n +1个加速结构（8）。提出的直线加速器（4）包含一个或多个模块（7、7A），并允许获得大的加速梯度和非常紧凑的结构。
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