Low level radio frequency system of 15-MeV electrons linac

Junqiang ZHANG; Yajuan LIU; Shaopeng ZHONG; Lin LI; Yingmin LI; Qiang GU

doi:10.11889/j.0253-3219.2016.hjs.39.030403

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Low level radio frequency system of 15-MeV electrons linac

更新时间：2021-05-24

- Low level radio frequency system of 15-MeV electrons linac
- NUCLEAR TECHNIQUES Vol. 39, Issue 3, Article number: 030403(2016)
- 作者机构：
  
  中国科学院上海应用物理研究所嘉定园区上海 201800
  Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.030403
  CLC： TL274+.2
- Received：15 October 2015，
  
  Accepted：2016-01-05，
  
  Published：25 March 2016
- 稿件说明：
移动端阅览
Junqiang ZHANG, Yajuan LIU, Shaopeng ZHONG, et al. Low level radio frequency system of 15-MeV electrons linac[J]. Nuclear techniques, 2016, 39(3): 030403
DOI：

Junqiang ZHANG, Yajuan LIU, Shaopeng ZHONG, et al. Low level radio frequency system of 15-MeV electrons linac[J]. Nuclear techniques, 2016, 39(3): 030403 DOI： 10.11889/j.0253-3219.2016.hjs.39.030403.

摘要

15-MeV电子加速器驱动的光中子源装置(TMSR Photo-Neutron Source Phase 1

TPNS1)是专为钍基熔盐堆(Thorium Molten Salt Reactor

TMSR)核数据测量设计和建造的。为保证直线加速器提供稳定的、高品质的束流

开发了基于可编程逻辑门阵列(Field Programmable Gate Array

FPGA)技术的低电平控制系统

利用上下变频、IQ (In-phase and Quadrature)调制解调技术实现了直线加速器幅度和相位的反馈控制。经测试

幅度和相位的控制精度达到±0.4%

可达±0.6°。长时间的运行表明

整个数字化环路的响应时间快

稳定性好

满足中子源装置的运行要求。

Abstract

Background:

The photo-neutron source driven by 15-MeV electrons linac in Thorium molten salt reactor (TMSR) program was designed f

or nuclear data measurement.

Purpose:

To ensure the linac to provide stable and high quality beam bunches

a low level radio frequency (LLRF) control system based on field programmable gate array (FPGA) was developed.

Methods:

LLRF realized digital amplitude and phase feedback control by using up-down converter

IQ (In-phase and Quadrature) modulator and demodulator techniques.

Results:

After commission

the control accuracy of amplitude and phase is less than

#177;0.4% and

#177;0.6

#176;

respectively.

Conclusion:

Long time running indicates that the whole digital control loop has the properties of fast time response and good stability

which meets the demand of photo-neutron facility.

关键词

Keywords

references

王宏伟 , 陈金根 , 蔡翔舟 , . 电子直线加速器驱动的光中子源装置的研制 . 核技术 , 2014 . 37 ( 10 ): 100522 .

WANG Hongwei , CHEN Jingen , CAI Xiangzhou , . Development of photo-neutron facility driven by electron LINAC . Nuclear Techniques , 2014 . 37 ( 10 ): 100522 .

钟少鹏 , 张俊强 , 张猛 , . EADSS 直线加速器射频系统设计 . 中国科学院上海应用物理研究所 , 2012 .

ZHONG Shaopeng , ZHANG Junqiang , ZHANG Meng , . Technical design report of EADSS linac RF system . Shanghai Institute of Applied Physics, Chinese Academy of Sciences , 2012 .

张志刚 , 赵玉斌 , 徐凯 , . 基于I/Q 解调原理的校准方法及实验 . 核技术 , 2015 . 38 ( 3 ): 030102 .

ZHANG Zhigang , ZHAO Yubin , XU Kai , . Calibration method and experiment based on I/Q demodulation principle . Nuclear Techniques , 2015 . 38 ( 3 ): 030102 .

X6-400M . X6-400M user's manual . Innovative Integration , 2012 .

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刘熔 . BEPCⅡ次谐波聚束器低电平控制系统研制 . 北京:中国科学院研究生院 , 2010 .

LIU Rong . Develop the LLRF systems for sub-harmonic bunchers of BEPC Ⅱ linac . Beijing:Graduate University of Chinese Academy of Sciences , 2010 .

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