A compact control system to achieve stable voltage and low jitter trigger for repetitive intense electron-beam accelerator based on resonant charging

Yongfeng Qiu,Xinbing Cheng,Jinliang Liu,Jianhua Yang,Xiao Yang

doi:10.1063/1.4994853

Yongfeng Qiu, Xinbing Cheng + Show 3 more

Open Access

https://doi.org/10.1063/1.4994853

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Journal: AIP Advances	Publication Date: Aug 1, 2017
Citations: 5	License type: cc-by

Affiliation: National University of Defense Technology

Abstract

A compact control system based on Delphi and Field Programmable Gate Array(FPGA) is developed for a repetitive intense electron-beam accelerator(IEBA), whose output power is 10GW and pulse duration is 160ns. The system uses both hardware and software solutions. It comprises a host computer, a communication module and a main control unit. A device independent applications programming interface, devised using Delphi, is installed on the host computer. Stability theory of voltage in repetitive mode is analyzed and a detailed overview of the hardware and software configuration is presented. High voltage experiment showed that the control system fulfilled the requests of remote operation and data-acquisition. The control system based on a time-sequence control method is used to keep constant of the voltage of the primary capacitor in every shot, which ensured the stable and reliable operation of the electron beam accelerator in the repetitive mode during the experiment. Compared with the former control system based on Labview and PIC micro-controller developed in our laboratory, the present one is more compact, and with higher precision in the time dimension. It is particularly useful for automatic control of IEBA in the high power microwave effects research experiments where pulse-to-pulse reproducibility is required.

Highlights

As the accelerator operates at repetition mode, the repetitive capability and stability of the electric-trigger of the main switch are very important.[12]
A nanosecond trigger signal with low jitter is urgent to control the main switch during the operation of the Intense electron-beam accelerator (IEBA) in the repetitive mode
For more compact structure, much lower jitter and more precise time sequence, a improved control system based on Delphi and Field Programmable Gate Array (FPGA) was developed for the IEBA

Summary

INTRODUCTION

A nanosecond trigger signal with low jitter is urgent to control the main switch during the operation of the IEBA in the repetitive mode. For more compact structure, much lower jitter and more precise time sequence, a improved control system based on Delphi and Field Programmable Gate Array (FPGA) was developed for the IEBA. Compared with the former control system based on Labview and PIC micro-controller in our laboratory, the size of the new one decreases largely.

The construction of the IEBA

The analysis of stability theory of voltage in repetitive mode

Hardware system configuration

Software system configuration

IMPLEMENTATION AND PERFORMANCE

CONCLUSIONS