Hefei Cas Ion Medical and Technical Devices Co., Ltd

Junjun Li

Yuntao Song

Yonghua Chen

Kaizhong Ding

Hansheng Feng

Gen Chen

Qingxi Yang

Jinxing Zheng

Jianghua Wei

Junsong Shen

Chunlong Zou

Yanfang Bi

Rui Hu

Jian Zhou

Mingzhun Lei

Jian Ge

Kai Zhou

Kun Pei

Zhong Wang

Xufeng Liu

Yucheng Wu

Xinyu Chen

Kai Yao

Zhengwen Xu

Lexing Hu

Lu Liu

Pengyu Wang

Disclosed a quench protection device of a superconducting magnet system, including a superconducting coil set; the superconducting coil set comprises two superconducting coils () which are symmetrical arranged, and each of the two superconducting coils () is connected in parallel with a protection diode (); the superconducting coils and the protection diode are connected with the power supply via a conductive wire; the superconducting coils set are connected in parallel with a quench protection unit (), a change-over switch () is arranged on a circuit of the two superconducting coils, the protection diode, and the power supply, and the change-over switch () is connected with an external resistor via a conductive wire (). The change-over switch of the quench protection device connects the superconducting coil and an external resistance, which realizes the quench protection of the superconducting coil.

Quench protection device of superconducting magnet system and working method thereof

Disclosed is an adjustable transmission device for measuring transverse parameters of beams, including: a CCD transmission support assembly, an external transmission rod, the CCD transmission support assembly is connected with a support block, and the support block is provided with the slotted set screw with flat point, and is connected with a limit block via a first fastener; a snap ring is arranged in the rear of the external transmission and is matched with a base; the base is connected with the CCD fixed plate via a second fastener. The external transmission rod is provided with a second groove for mounting the first retaining ring, and a side of the first retaining ring is sequentially provided with a vacuum observation window, a second retaining ring, a head assembly, a retaining sleeve and a screwing mechanism.

Adjustable transmission device for measuring transverse parameters of beams

A proton therapy system based on a compact superconducting cyclotron, including: a superconducting cyclotron system, an energy selection system, a beam transport system, a fixed therapy room subsystem and a rotating frame therapy subsystem; a fixed-energy proton beam extracted from a superconducting cyclotron of the superconducting cyclotron system is adjusted into a continuous and adjustable proton beam of 70 MeV to 200 MeV by the energy selection system, thus realizing a longitudinal adjustment for a proton range during treating a tumor, and the continuous and adjustable proton beam is respectively transmitted to the fixed therapy room subsystem and the rotating frame therapy subsystem by the beam transport system. The cooperative control of the superconducting cyclotron system, the energy selection system, the beam transport system and the therapy head realizes the transverse expansion of proton beams, thus realizing intensity modulated radiation therapy for the tumor.

Proton therapy system based on compact superconducting cyclotron

The invention discloses a method for adjusting particle orbit alignment by using a first harmonic in a cyclotron, including the following steps: generating a correcting magnetic field through eight coils symmetrically about the middle plane; arranging the positions of the coils and the currents applied, so that they can generate a first harmonic of which the amplitude and phase are arbitrarily adjustable; according to the actual eccentricity of the particle orbit, adjusting the magnitude and direction of the currents applied to the coils, and optimizing the alignment of the particle trajectory. By controlling an external DC power source of the accelerator and combining the real-time feedback of the beam detection of the accelerator, the invention may perform real-time adjustment during the debugging and operation of the accelerator, with high feasibility and operability; compared with traditional methods, the invention may achieve real-time adjustment during the debugging and operation of the accelerator.

Method for adjusting particle orbit alignment by using first harmonic in cyclotron

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Anhui, China

Junjun Li