High-power microwave active protection device

A high-power microwave, active protection technology, applied in the direction of automatic disconnection of emergency protection devices, emergency protection circuit devices, circuit devices, etc., can solve problems affecting experimental operation, ignition phenomenon, damage to ceramic windows, etc. Reliability, avoid fire phenomenon, avoid the effect of economic loss

Inactive Publication Date: 2014-02-19
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

In the process of fusion experiments, it often happens that some microwaves are reflected back due to poor coupling between plasma and microwaves. At this time, it is easy to cause ignition in the waveguide, which will...

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  • High-power microwave active protection device
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  • High-power microwave active protection device

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Embodiment Construction

[0013] Such as figure 1 As shown, a high-power microwave active protection device includes a klystron 10, the output end of the klystron 10 is connected with a dual-directional coupler 1, and the dual-directional coupler 1 is connected with a DC blocker 2, a wave detector 3, and The isolation amplifier 4, the high reflection protection box 5 and the fast protection box 7 are connected, the high reflection protection box 5 is also connected with the microwave source 6, the fast protection box 7 is respectively connected with two digital isolators 8, and the two digital isolators are respectively 8 Connected with PLC9 and high voltage source 11, the microwave output from the klystron 10 is transmitted into the dual directional coupler 1, and the reflected power coupled out by the dual directional coupler 1 is converted into a voltage signal by the DC blocker 2 and the detector 3 , the voltage signal is isolated and amplified by the isolation amplifier 4 and then sent to the high...

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Abstract

The invention discloses a high-power microwave active protection device. The high-power microwave active protection device comprises a klystron. The output end of the klystron is connected with double directional couplers, and the double directional couplers are sequentially connected with a DC block, a wave detector, an isolation amplifier, a high reflection protection box and a fast protection box. The high reflection protection box is further connected with a microwave source, the fast protection box is respectively connected two digital isolators, and the two digital isolators are connected with a PLC and a high voltage source respectively. According to the protection method of the high-power microwave active protection device, by judging the magnitude of reflection power, signals of the microwave source are cut off timely before ignition, and thus ignition is avoided; meanwhile, a protection measure for faults of a circulator is provided for the microwave devices such as the klystron strict in the reflection power; system reliability is improved, the klystron is protected to be safe, and heavy economical losses are avoided.

Description

technical field [0001] The invention relates to the technical field of controlled thermonuclear fusion, in particular to a high-power microwave active protection device. Background technique [0002] Low clutter is currently widely used in nuclear fusion experiments, and its main functions are current drive and auxiliary heating. The low clutter system mainly outputs power through multiple high-power klystrons. In the process of fusion experiments, it often happens that some microwaves are reflected back due to poor coupling between plasma and microwaves. At this time, it is easy to cause ignition in the waveguide, which will damage the ceramic window used for vacuum sealing and affect the operation of the experiment. , if the circulator protecting the klystron breaks down, the higher reflected power will also damage the klystron, causing huge losses. Although the ignition protection system has been installed on the system, it is a passive protection action after ignit...

Claims

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Application Information

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IPC IPC(8): H02H3/42
Inventor 马文东胡怀传王茂徐旵东刘甫坤单家方
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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