Automatic frequency tuning control system

Abstract

The invention relates to the technical field of frequency control over high-frequency cavities of ion acceleration devices, in particular to an automatic frequency tuning control system, which comprises a drift tube high-frequency resonant cavity, wherein preset tuners are inserted into the cavity; a sampling ring arranged in the cavity is connected with an oscilloscope for displaying a voltage signal sampled from the cavity through a sampling line; driving motors are arranged on the tuners, and are connected with a control computer through a control line; the tuners are connected with the cavity through flanges; the control computer is used for determining a frequency difference between the design frequency of the cavity and the actual frequency of the cavity to control the driving motor to work through a voltage-to-frequency conversion algorithm. The automatic frequency tuning control system is applied to any high-frequency device required to work at stable frequency or any high-frequency system consisting of a plurality of high-frequency cavities, and can be used for remotely, rapidly and automatically tuning the frequency of the cavity or stabilizing the frequency of the cavity within a certain amplitude.

Description

technical field [0001] The invention relates to the technical field of frequency control of a high frequency cavity of an ion accelerator, in particular to an automatic frequency tuning control system. Background technique [0002] In the prior art, the application of the high-frequency power supply technology applied to radar in the accelerator field has greatly promoted the development of modern accelerators. In view of the particularity of the accelerator cavity, the required high-frequency cavity must have high stability Therefore, the high-frequency accelerator cavity has a tuner with stable tuning frequency. Most of the commonly used cavity tuning systems currently obtain a value close to a stable frequency by fixing the position of the tuner once. Then through about 30 minutes of high-power operation, the entire cavity and the entire cooling circuit can get a stable temperature value, and the temperature at this time is generally inconsistent with the temperature whe...

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Problems solved by technology

Then through about 30 minutes of high-power operation, the entire cavity and the entire cooling circuit can get a stable temperature value, and the temperature at this time is generally inconsistent with the temperature when the tuner is set, which makes the frequency of the cavity and the required The stable frequency difference is further expanded, and the power loss fed into the high-frequency cavity is larger than the design or expected

Moreover, the stability of this tuning system is poor, and the stabilization time required is also long, which is not conducive to the rapid operation of the high-frequency cavity.

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