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

Abstract

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.

First results of negative ion extraction with Cs for CRAFT prototype negative beam source

“…In order to understand the physics and pre-study the engineering issues for RF negative beam source, a prototype source with single driver was developed [6]. In last year, the RF source achieved long pulse discharge of 1000 s with RF power of 35 kW and shot pulse of 60 s with 80 kW on the RF ion source test bed [7][8][9][10][11][12], respectively. Recently, the RF beam source was tested with negative ion production and extraction with Cesium (Cs) injection.…”

Achievement of 1000 s plasma generation of RF source for neutral beam injector

“…An RF plasma source was designed and developed in the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP) for key issue studies of RF plasma generators that can be used on both positive and negative ion sources [14][15][16][17][18]. Recently, long pulse of 1000 s plasma was generated with RF power of 35 kW on the RF ion source test bed [19][20][21]. It is the first time to achieve long pulse operation of plasma source in China.…”

Integrated synchronous data acquisition subsystem for high‐speed GPR system

“…Actually in high speed data acquisition design, one performance bottle neck is the speed mismatch between the front end data acquisition unit and the backend data transmission and storage [18]. For instance, for an 8 Gsps real time digitiser used in this paper, sampling each data sample only takes 125 ps while it takes on average ∼13 ns to transfer each sampling data to the backend computer hard disk.…”