4results about How to "Improve beam quality" patented technology

The invention relates to the technical field of particle accelerators, in particular to a compact rotary thin-wall beam transmission vacuum system and a design method. The beam transmission vacuum system comprises: a first transmission unit, one end of which is provided with a first bifurcated thin-wall dipolar iron vacuum chamber to form a first branch and a second branch; one end of the second transmission unit is connected with the second branch, and a second bifurcated thin-wall dipolar iron vacuum chamber and a third bifurcated thin-wall dipolar iron vacuum chamber are sequentially arranged in the second transmission unit to form a third branch, a fourth branch and a fifth branch; the fixed treatment terminal is connected with the first branch; and rotating the treatment terminal to provide the beam to one of the plurality of treatment rooms in an alternative manner. According to the invention, an intensive architecture that a single rotary treatment terminal provides particle beams for a plurality of treatment rooms at the same time is adopted, so that the equipment manufacturing cost is greatly reduced, the equipment utilization rate is improved, and the treatment cost is reduced.

The application discloses a beam-linear integrated acceleration structure, which comprises multiple pairs of electrode rods and multiple ring bodies arranged in sequence along the beam motion direction, the axial direction of the ring body is consistent with the beam motion direction, and the through holes of the ring body are arranged corresponding to the beam motion path; two adjacent ring bodies form an acceleration gap; the length direction of the electrode rod is consistent with the beam motion direction; every two pairs of electrode rods are limited in an acceleration gap and are fixedly connected with two adjacent ring bodies respectively; and the two pairs of electrode rods in each acceleration gap are distributed orthogonally; along the beam motion direction, the acceleration stages of the beam-linear integrated acceleration structure are as follows: in a first stage, the electrode rods in each acceleration gap form a transverse focusing quadrupole field; in a second stage, the surface of the electrode rod is modulated with a wave surface; in a third stage, along the beam motion direction, the multiple electrode rods are gradually shortened, and the multiple ring bodies are gradually lengthened; and in a fourth stage, the electrode rods disappear, the multiple ring bodies form multiple complete drift tubes and are gradually lengthened. The application can make the linear acceleration device more compact and efficient.

The application provides a linear injector system and a beam control method, comprising: a radio frequency quadrupole accelerator, comprising a first bunching section arranged at the end of the radio frequency quadrupole accelerator, and the first bunching section is used for performing initial phase width compression on a beam; and at least one cross-finger drift tube linear accelerator, each comprising at least one KONUS period, and each KONUS period comprises, in sequence from an input end to an output end: a second bunching section, used for compressing the phase width of the beam from an upstream, so as to obtain a beam after phase width compression; an accelerating section, used for accelerating the beam after phase width compression at a constant synchronous phase, so as to obtain an accelerated beam; and a focusing section, used for focusing the accelerated beam in a plane perpendicular to the transmission direction, so as to obtain a focused beam.

The invention relates to the technical field of accelerator detection, and provides an accelerator beam waist measuring device and method, the accelerator beam waist measuring device comprises a vacuum chamber, a measuring device, a driving device and a displacement measuring piece, the vacuum chamber is provided with a vacuum cavity and a butt joint port; the measuring device is arranged in the vacuum chamber and comprises a fluorescent target, a reflector and a camera, the fluorescent target is provided with scale marks and is used for measuring the beam spot size of a beam, the fluorescent target and the reflector are arranged in the vacuum chamber, the fluorescent target directly faces the docking port, the reflector is arranged on one side of the fluorescent target, and the camera is arranged on a reflection light path of the reflector; the driving device is arranged in the vacuum chamber and is used for driving the fluorescent target, the reflecting mirror and the camera to synchronously move along the beam direction; the displacement measuring piece is used for measuring the moving distance of the fluorescent target in the beam direction, so that the camera can collect the beam spot sizes of different positions in the beam direction. According to the accelerator beam waist measurement equipment and the measurement method provided by the invention, the beam waist position can be accurately obtained.