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The development of data acquisition and control system for extraction power supply of prototype RF ion source

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Plasma Science and Technology 2018年第8期20卷 104-111页

作者： Meichu HUANG Chundong HU Yuanzhe ZHAO Caichao JIANG Yahong XIE Shiyong CHEN Qinglong CUI Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 People's Republic of China University of Science and Technology of China Hefei 230026 People's Republic of China)

A 16 kV/20 A power supply was developed for the extraction grid of prototype radio frequency（RF） ion source of neutral beam injector. To acquire the state signals of extraction grid power supply（EGPS） and control the operation of the EGPS, a data acquisition and control system has been developed. This system mainly consists of interlock protection circuit board, photoelectric conversion circuit, optical fibers, industrial compact peripheral component interconnect（CPCI） computer and host computer. The human machine interface of host computer delivers commands and data to program of the CPCI computer, as well as offers a convenient client for setting parameters and displaying EGPS status. The CPCI computer acquires the status of the power supply. The system can turn-off the EGPS quickly when the faults of EGPS occur. The system has been applied to the EGPS of prototype RF ion source. Test results show that the data acquisition and control system for the EGPS can meet the requirements of the operation of prototype RF ion source.

关键词： RF ion source data acquisition control system TCP/IP protocol beam extraction

Thermal analysis of EAST neutral beam injectors for long-pulse beam operation

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Plasma Science and Technology 2018年第4期20卷 176-180页

作者：胡纯栋许永建谢远来谢亚红梁立振蒋才超刘胜韦江龙盛鹏刘智民陶玲 the nbi team Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 People's Republic of China

Two sets of neutral beam injectors(NBI-1 and NBI-2) have been mounted on the EAST tokamak since 2014. NBI-1 and NBI-2 are co-direction and counter-direction, respectively. As with indepth physics and engineering study of EAST, the ability of long pulse beam injection should be required in the NBI system. For NBIs, the most important and difficult thing that should be overcome is heat removal capacity of heat loaded components for long-pulse beam extraction. In this article, the thermal state of the components of EAST NBI is investigated using water flow calorimetry and thermocouple temperatures. Results show that(1) operation parameters have an obvious influence on the heat deposited on the inner components of the beamline,(2) a suitable operation parameter can decrease the heat loading effectively and obtain longer beam pulse length, and(3) under the cooling water pressure of 0.25 MPa, the predicted maximum beam pulse length will be up to 260 s with 50 keV beam energy by a duty factor of 0.5. The results present that, in this regard, the EAST NBI-1 system has the ability of long-pulse beam injection.

关键词： thermal analysis neutral beam injector beam extraction beam divergence ion source

The Arc Regulation Characteristics of the High-Current Ion Source for the EAST Neutral beam Injector

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Plasma Science and Technology 2014年第4期16卷 429-432页

作者：谢亚红胡纯栋刘胜蒋才超梁立振李军谢远来刘智民 Institute of Plasma Physics Chinese Academy of Sciences

The arc regulation method is applied to the high-current ion source for high-power hydrogen ion beam extraction for the first time. The characteristics of the arc and beam, including the probe ion saturation current, the arc power and the beam current, are studied with feedback control. The results show that the arc regulation method can be successfully applied to ion beam extraction. This lays a sound foundation for the testing of a new ion source and the operation of a conditioned ion source for neutral beam injector devices.

关键词： ion source arc regulation ion saturation current beam extraction