Thermal protection method for low-hybrid-wave antenna

A low clutter, thermal protection technology, applied in antennas, antenna components, interference protection, etc., can solve the problems of antenna temperature rise, antenna deformation, ablation, etc., achieve low impedance, small attenuation, and realize automatic protection Effect

Inactive Publication Date: 2017-05-17
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

Practice has shown that although the antenna is equipped with a water-cooled plate, under the combined action of high-power microwave output and high-parameter long-pulse plasma, the heat accumulation of the antenna will exceed the cooling capacity of the water-cooled plate, causing the temperature of the antenna to continue to rise. Cause antenna deformation, ablation or even complete damage

Method used

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  • Thermal protection method for low-hybrid-wave antenna

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Embodiment Construction

[0013] Such as figure 1 As shown, a thermal protection method for a low-clutter antenna uses a K-type thermocouple 2 to measure the temperature of the antenna 1, and the cold end of the thermocouple 2 is led out of the antenna vacuum chamber by vacuum brazing.

[0014] Select the temperature measurement point on the antenna 1 located in the vacuum chamber, and place a K-type thermocouple 2 at the position of each measurement point, and the cold end of the thermocouple 2 is drawn from the antenna vacuum chamber by means of a vacuum lead; The terminal is connected to the signal transfer box 3 in the form of a screw terminal, and the signal transfer box 3 converts the 32-way terminal interface into a standard SCSI female head through the circuit board inside the signal transfer box 3, and connects with the male head of one end of the SCSI cable 4; Two 16-channel temperature inspection instruments 10 are packaged inside the inspection chassis 5, and the thermocouple input interfac...

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Abstract

The invention discloses a thermal protection method for a low-hybrid-wave antenna. The temperature of an antenna is measured by a K type thermocouple; and the cold end of the thermocouple is led out of an antenna vacuum room through a vacuum brazing way. 32 paths of data interfaces are reserved in a signal interconnecting box; and the number of antenna temperature measuring points within a range can be expanded freely by only adding the thermocouples with the corresponding number. The cold end of the thermocouple is connected to the signal interconnecting box while the signal interconnecting box is fixedly arranged on a supporting structure on the exterior of the antenna vacuum room, so that replacement, addition and connection of the thermocouple is quite convenient; the signal interconnecting box and an SCSI cable both have shielding structures while the SCSI cable is low in impendence, low in signal attenuation and supports relatively long distance signal transmission; and a temperature inspection machine case is placed in a measurement and control room machine cabinet far from the working field, so that the overall measurement system has quite high mechanical stability and electromagnetic shielding performance.

Description

technical field [0001] The invention relates to the technical field of antenna temperature monitoring in the field of magnetic confinement nuclear fusion, in particular to a thermal protection method for a low-clutter antenna. Background technique [0002] Low clutter is currently one of the most effective means of current drive and auxiliary heating in EAST. The low clutter system is essentially a high-power microwave system, and the low clutter antenna couples megawatt-level high-power microwaves to the plasma. core components. When the low clutter system outputs power, in addition to the conductor loss caused by its own impedance, the low clutter antenna faces the plasma directly and also bears the radiation impact caused by the high temperature plasma, both of which will bring the antenna Rise in temperature. Practice has shown that although the antenna is equipped with a water-cooled plate, under the combined action of high-power microwave output and high-parameter lo...

Claims

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Application Information

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IPC IPC(8): H01Q1/00G01K7/02
CPCH01Q1/002G01K7/023
Inventor 吴则革杨永刘亮王茂
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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