本文首先简单介绍全数字化T/R组件应用场景,然后详细阐述了全数字化T/R组件发射通道的工作原理及关键技术,主要是直接数字合成技术(direct Digital Synthesize,DDS),之后提出了一种L波段(5.3GHz~5.9GHz)数字化T/R组件方案并给出原理框图...本文首先简单介绍全数字化T/R组件应用场景,然后详细阐述了全数字化T/R组件发射通道的工作原理及关键技术,主要是直接数字合成技术(direct Digital Synthesize,DDS),之后提出了一种L波段(5.3GHz~5.9GHz)数字化T/R组件方案并给出原理框图;再重点分析全数字化T/R组件发射通道的设计,包括:信道模块、发射前端、数字及控制单元设计,并出于一体化设计的考虑简单介绍了射频接收前端的设计思想;最后,对整个系统进行调测试,给出了实物照片和测试数据,测试结果表明该数字化T/R组件发射通道参数:工作带宽5.3GHz~5.9GHz,调制带宽1MHz~5MHz,移相范围0o~360o,最大衰减量15dB,最大输出峰值功率50W,最大工作占空比25%,杂散抑制大于60dBc,达到了指标要求,验证了数字化T/R组件发射通道的性能。展开更多
In-vessel components are important parts of the EAST superconducting tokamak. They include the plasma facing components, passive plates, cryo-pumps, in-vessel coils, etc. The structural design, analysis and related R...In-vessel components are important parts of the EAST superconducting tokamak. They include the plasma facing components, passive plates, cryo-pumps, in-vessel coils, etc. The structural design, analysis and related R＆D have been completed. The divertor is designed in an up-down symmetric configuration to accommodate both double null and single null plasma operation. Passive plates are used for plasma movement control. In-vessel coils are used for the active control of plasma vertical movements. Each cryo-pump can provide an approximately 45 m^3/s pumping rate at a pressure of 10^-1 Pa for particle exhaust. Analysis shows that, when a plasma current of 1 MA disrupts in 3 ms, the EM loads caused by the eddy current and the halo current in a vertical displacement event （VDE） will not generate an unacceptable stress on the divertor structure. The bolted divertor thermal structure with an active cooling system can sustain a load of 2 MW/m^2 up to a 60 s operation if the plasma facing surface temperature is limited to 1500 ℃. Thermal testing and structural optimization testing were conducted to demonstrate the analysis results.展开更多
文摘本文首先简单介绍全数字化T/R组件应用场景,然后详细阐述了全数字化T/R组件发射通道的工作原理及关键技术,主要是直接数字合成技术(direct Digital Synthesize,DDS),之后提出了一种L波段(5.3GHz~5.9GHz)数字化T/R组件方案并给出原理框图;再重点分析全数字化T/R组件发射通道的设计,包括:信道模块、发射前端、数字及控制单元设计,并出于一体化设计的考虑简单介绍了射频接收前端的设计思想;最后,对整个系统进行调测试,给出了实物照片和测试数据,测试结果表明该数字化T/R组件发射通道参数:工作带宽5.3GHz~5.9GHz,调制带宽1MHz~5MHz,移相范围0o~360o,最大衰减量15dB,最大输出峰值功率50W,最大工作占空比25%,杂散抑制大于60dBc,达到了指标要求,验证了数字化T/R组件发射通道的性能。
基金JSPS-CAS Core-University Program on Basic Research of Nuclear Fusion Reactor Engineering in 2007
文摘In-vessel components are important parts of the EAST superconducting tokamak. They include the plasma facing components, passive plates, cryo-pumps, in-vessel coils, etc. The structural design, analysis and related R＆D have been completed. The divertor is designed in an up-down symmetric configuration to accommodate both double null and single null plasma operation. Passive plates are used for plasma movement control. In-vessel coils are used for the active control of plasma vertical movements. Each cryo-pump can provide an approximately 45 m^3/s pumping rate at a pressure of 10^-1 Pa for particle exhaust. Analysis shows that, when a plasma current of 1 MA disrupts in 3 ms, the EM loads caused by the eddy current and the halo current in a vertical displacement event （VDE） will not generate an unacceptable stress on the divertor structure. The bolted divertor thermal structure with an active cooling system can sustain a load of 2 MW/m^2 up to a 60 s operation if the plasma facing surface temperature is limited to 1500 ℃. Thermal testing and structural optimization testing were conducted to demonstrate the analysis results.
