High-precision method of magnetic field measurement for compact intermediate energy cyclothron

A cyclotron and magnetic field measurement technology, which is applied to measuring devices, measuring magnetic variables, instruments, etc., can solve the problems of low precision and long time for cyclotron magnetic field measurement, and achieve the effect of improving measurement accuracy

Active Publication Date: 2013-04-24
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0003] In view of the defects existing in the prior art, the purpose of the present invention is to provide a medium-energy compact cyclotron magnetic f

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  • High-precision method of magnetic field measurement for compact intermediate energy cyclothron

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] figure 1 It shows a schematic diagram of a high-precision driving method for magnetic field measurement of a medium-energy cyclotron according to the present invention, through which the high-precision magnetic field measurement can be completed in a relatively short period of time. The method mainly includes the following steps:

[0018] Step S1, keeping the rotating arm 4 installed with the Hall probe at the current target angular position.

[0019] The Hall probe is arranged on the sliding block of the rotating arm, and the servo motor can drive the sliding block to move linearly along the rotating arm by dragging.

[0020] Step S2, the Hall probe on the rotating arm 4 is driven by the servo motor to move radially along the radial direction of the magnet center plane 1 from the center position of the plane to the maximum radius position ac...

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Abstract

The invention belongs to magnetic field measurement technology of cyclothros, in particular to a high-precision method of magnetic field measurement for a compact intermediate energy cyclothron. According to the high-precision method of the magnetic field measurement for the compact intermediate energy cyclothron, the positioning of a measurement point adopts a positioning mode which combines circumferential movement with radial movement, the circumferential movement is driven by a stepper motor, the radial movement is driven by servo motor, a control algorithm adopts a mode which combinines a greedy algorithm with an optimal algorithm, and therefore computing requirements of measurement precision can be met. The high-precision method of the magnetic field measurement for the compact intermediate energy cyclothron solves the problems of long time and low precision of the intermediate energy cyclothron magnetic field measurement and can complete magnetic field high-precision measurement work in shorter time.

Description

technical field [0001] The invention belongs to the cyclotron magnetic field measurement technology, in particular to a medium-energy compact cyclotron magnetic field measurement high-precision driving method. Background technique [0002] A medium-energy compact cyclotron is used to extract a stable beam, and the beam movement needs to be constrained by an isochronous magnetic field. In order to provide an isochronous magnetic field, it is necessary to measure the magnetic field of the accelerator. The magnetic field is shimmed according to the measured data, so that the magnetic field meets the beam dynamics requirements. At present, the cyclotron magnetic field measurement and positioning method generally adopts circular motion angle positioning, and the magnetic field measurement is performed circle by circle, which requires the use of an angle encoder. However, the angle encoder is very sensitive to external vibrations, resulting in long positioning time and low accu...

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Application Information

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IPC IPC(8): G01R33/07
Inventor 张天爵殷治国钟俊晴吕银龙曹磊
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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