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Phase Detection Method of Tuning Loop for Intense Current Compact Cyclotron

A cyclotron and phase detection technology, applied in the phase angle between voltage and current, instruments, measuring devices, etc., can solve the problems of high cost of directional couplers, no advantages in engineering progress and cost, and high requirements for installation accuracy. To achieve the effect of simple method, low cost and reduced construction cost

Active Publication Date: 2017-01-25
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of directional coupler is expensive and has high requirements for installation accuracy, so it has no advantages in project progress and cost.

Method used

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  • Phase Detection Method of Tuning Loop for Intense Current Compact Cyclotron
  • Phase Detection Method of Tuning Loop for Intense Current Compact Cyclotron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Taking a medical cyclotron as an example, a new type of coupler is applied outside the ceramic coupling window of the RF resonator, and two pairs of ports are symmetrically designed on both sides of the feed tube 3 at the input end. Each pair of ports is composed of two BNC interfaces. In application, these interfaces can be replaced with various other standard or non-standard high-frequency interfaces, such as N-type interface, SMA-type interface, etc. The two ports are placed along the same busbar of the outer cylinder of the feeder tube, the inner conductor of the feeder tube is coplanar with the plane formed by the two busbars, and the distance between the copper plate 7 connected to the inner conductor 6 of the two ports on the same side and the port joint can be adjusted by changing the length of the conductor 6 Adjustment to realize the adjustable coupling amount. The inner conductors of the two BNC ports on the same side are connected by a copper plate with a wid...

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Abstract

The invention relates to a strong-flow compact type circular accelerator tuning loop phase detection method. According to the method, two pairs of ports are symmetrically arranged on the two sides of a circular accelerator radio frequency resonant cavity input end feeder pipe, the two ports on the same side are arranged along the same generatrix of an outer cylinder of the feeder pipe, the distance between a connector and a copper plate connected with conductors inside the two ports on the same side can be adjusted, and therefore the coupling coefficient is adjustable. The two ports on one side are used as inductance sampling ports, the two ports on the other side are used as capacitance sampling ports, signals collected by the two kinds of sampling ports are transmitted to a low-level control system through transmission lines, and phase detection on a tuning loop is achieved. The strong-flow compact type circular accelerator tuning loop phase detection method reduces the building cost of a strong-flow compact type circular accelerator and improves the reliability of the strong-flow compact type circular accelerator.

Description

technical field [0001] The invention relates to the design technology of a compact cyclotron, in particular to a phase detection method for a tuning ring of a high-current compact cyclotron. Background technique [0002] When the medical cyclotron cavity is running, the power fed into the cavity is very high, and the heat generation of the cavity will rise sharply in a short time, and the cavity will be deformed due to thermal effects, coupled with the secondary electron multiplication effect in the cavity, It will lead to the change of the equivalent parallel impedance of the cavity, which will cause the impedance mismatch, and cause the cavity detuning. In order to avoid the possible damage to the equipment caused by the cavity detuning, a set of tracking cavity detuning is required. The loop that can be tuned in time and can be tuned in time is called a tuning loop. [0003] In the previous design, the sampling of the cavity power feed-in terminal and the signal sampling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R25/00
Inventor 殷治国李鹏展张天爵雷钰纪彬赵振鲁付晓亮宋国芳
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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