A non-IQ sampling controller in low level RF system

YIN Cheng-Ke; DAI Zhi-Min; LIU Jian-Fei; ZHAO Yu-Bin; ZHANG Tong-Xuan; FU Ze-Chuan; LIU Wei-Qing

doi:10.1088/1674-1137/32/10/018

Chinese Physics C> 2008, Vol. 32> Issue(10) : 852-856 DOI: 10.1088/1674-1137/32/10/018

A non-IQ sampling controller in low level RF system

Abstract
HTML
Reference
Related

PDF

Abstract：
This paper describes a non-IQ controller for digital Low Level RF (LLRF) feedback control. Based on this non-IQ sampling method, arbitrary frequency relationship between ADC/DAC sampling clocks and IF signals can be employed. The nonlinearity in digital conversion can be reduced and the system dynamic performance improved. This paper analyzes the nonlinearity in conventional IQ sampling, gives the state variable description of the non-IQ algorithm, presents an implementation and its synchronization, and compares its performances with IQ sampling.

References

[1]

. WANG Fang, WANG Guang-Wei, LU Jian-Fa. HEP NP,2004, 28(1): 88 (in Chinese)2. WANG Fang, WANG Guang-Wei. Nuclear Techniques,2004, 27(1): 18 (in Chinese)3. WANG Fang, WANG Guang-Wei, LU J F. Low Level Control RF System for SSRF, APAC, 2001. Beijing, China,20014. ZHAO Yu-Bin et al. Digital Prototype of Low Level RF forSSRF, Chin. Phys. C (HEP NP) (in press)5. Ziomek C. Digital I/Q Demodulator, PAC 1995. SLAC-PUB-95-68576. Champion M, Cro ord M, MA H et al. The Spallation Neutron Source Accelerator Low Level RF Control System,PAC2003. 3377-33797. Doolittle L, Lo C C, Monroy M, Ratti A. The SNS frontend LLRF system. Proceedings of LINAC 2002. Gyeongju,Korea8. CHEN S Y, XU H J, ZHAO Z T. PAC, 1999, 1: 2099. Simrock S et al. Conceptual LLRF Design for the EuropeanXFEL, LINAC 200610. Lawrence Doolittle, MA Heng-Jie. Mark Stuart Champion.Digital Low-Level RF Control Using Non-IQ Sampling.Proc. LINAC 2006. THP004

[1]	Xin Wang , Jun-Li Li , Zhen Wu , Rui Qiu , Chun-Yan Li , Man-Chun Liang , Hui Zhang , Zhi Gang , Hong Xu . Improved algorithms and coupled neutron-photon transport for auto-importance sampling method. Chinese Physics C, 2017, 41(1): 014103. doi: 10.1088/1674-1137/41/1/014103
[2]	Sharifi Asadi Malafeh , M. Ghergherehchi , H. Afarideh , J. S. Chai , Yoon Sang Kim . Intelligent low-level RF system by non-destructive beam monitoring device for cyclotrons. Chinese Physics C, 2016, 40(4): 047001. doi: 10.1088/1674-1137/40/4/047001
[3]	HUANG Jiang , XIONG Yong-Qian , CHEN De-Zhi , LIU Kai-Feng , YANG Jun , LI Dong , YU Tiao-Qin , FAN Ming-Wu , YANG Bo . A permanent magnet electron beam spread system used fora low energy electron irradiation accelerator. Chinese Physics C, 2014, 38(10): 107008. doi: 10.1088/1674-1137/38/10/107008
[4]	GENG Hui-Ping , GUO Zhen . Uncoupled achromatic condition of a dog-leg system with the presence of RF cavities. Chinese Physics C, 2014, 38(6): 067001. doi: 10.1088/1674-1137/38/6/067001
[5]	ZHAO Yu-Ning , LI Wei-Min , WU Cong-Feng , WANG Lin . Analytic modeling of instabilities driven by higher-order modes in the HLS Ⅱ RF system with a higher-harmonic cavity. Chinese Physics C, 2013, 37(8): 087005. doi: 10.1088/1674-1137/37/8/087005
[6]	YANG Jun , LUO Xiao-Liang , LIU Guo-Fu , LIN Cun-Bao , WANG Yan-Ling , HU Qing-Qing , PENG Jin-Xian . Digital discrimination of neutrons and γ rays with organic scintillation detectors in an 8-bit sampling system using frequency gradient analysis. Chinese Physics C, 2012, 36(6): 544-551 . doi: 10.1088/1674-1137/36/6/011
[7]	QIU Feng , GAO Jie , LIN Hai-Ying , LIU Rong , MA Xin-Peng , SHA Peng , SUN Yi , WANG Guang-Wei , WANG Qun-Yao , XU Bo . A digital low-level radio-frequency system R&D for a 1.3 GHz nine-cell cavity. Chinese Physics C, 2012, 36(3): 261-266. doi: 10.1088/1674-1137/36/3/013
[8]	SUN An , TANG Ya-Zhe , ZHANG Li-Ping , LI Ying-Min , Sung Kim . A coaxial HOM coupler for a superconducting RF cavity and its low-power measurement results. Chinese Physics C, 2011, 35(3): 301-307. doi: 10.1088/1674-1137/35/3/017
[9]	ZHANG He , WANG Fang , ZHANG Bao-Cheng , LIN Lin , HAO Jian-Kui , LIU Ke-Xin . Design of a low level radio frequency control system for the direct current-superconductive photocathode injector at Peking University. Chinese Physics C, 2011, 35(10): 955-958. doi: 10.1088/1674-1137/35/10/013
[10]	SUN Da-Rui , XU Jin-Qiang , CHEN Sen-Yu . Electro-optical sampling non-synchronous delay scanning measurement ofelectron beam bunch length at BFEL. Chinese Physics C, 2010, 34(2): 227-230. doi: 10.1088/1674-1137/34/2/014
[11]	YUE Ke , YU Yu-Hong , XU Hu-Shan , SUN Zhi-Yu , WANG Jian-Song , XIAO Zhi-Gang , HU Zheng-Guo , CHEN Ruo-Fu , ZHANG Xue-Ying , TU Xiao-Lin , CHEN Jun-Ling , ZHAN Wen-Long . Characteristics of the sampling paddle modules of neutron wall from the cosmic ray test. Chinese Physics C, 2010, 34(8): 1111-1115. doi: 10.1088/1674-1137/34/8/014
[12]	QI Bin , MENG Jie , ZHANG Shuang-Quan , WANG Shou-Yu , PENG Jing . Chiral doublet bands and energy-level crossing. Chinese Physics C, 2009, 33(S1): 43-45. doi: 10.1088/1674-1137/33/S1/014
[13]	SHENG Hai-Qing , ZHAI Jian , LI Xian-Feng , MA Ying-Jun , ZHAO Yan-Xin , WANG Ya-Kun , ZHAO Lei , ZHU Li-Hua , WU Xiao-Guang , HE Chuang-Ye , LIU Yin , HAO Xin , LI Xue-Qin . Level structure of ¹⁵⁹Lu. Chinese Physics C, 2009, 33(S1): 164-166. doi: 10.1088/1674-1137/33/S1/052
[14]	NIE Yuan-Cun , LU Yuan-Rong , CHEN Jia-Er , YAN Xue-Qing , GUO Zhi-Yu , ZHU Kun , FANG Jia-Xun . Beam dynamics and RF design of trapezoidal IH-RFQ with low energy spread. Chinese Physics C, 2009, 33(S2): 105-108. doi: 10.1088/1674-1137/33/S2/027
[15]	TANG Chuan-Xiang , LIU Xiao-Han . Ultra-low emittance X-band photocathode RF gun. Chinese Physics C, 2009, 33(S2): 102-104. doi: 10.1088/1674-1137/33/S2/026
[16]	XU Zhe , ZHAO Hong-Wei , WANG Chun-Xiao , XIA Jia-Wen , ZHAN Wen-Long , BIAN Zhi-Bin . RF system design and measurement of HIRF-CSRe. Chinese Physics C, 2009, 33(5): 387-392. doi: 10.1088/1674-1137/33/5/014
[17]	HOU Mi , PEI Guo-Xi , . Modeling of the RF System for the Normal Conducting Linac. Chinese Physics C, 2008, 32(1): 56-59. doi: 10.1088/1674-1137/32/1/013
[18]	CHENG Xiao-Lei , FAN Ru-Yu , LI Bing-Kang . Design of a 1.2 GSPS single-channel real-time long-distance transmission sampling system for fast-transient signal. Chinese Physics C, 2008, 32(S2): 217-221.
[19]	WANG Fang , WANG Guang-Wei , LU Jian-Fa . Low Level RF Control System for SSRF. Chinese Physics C, 2004, 28(1): 88-91.
[20]	Ren Zhongzhou , Xu Gongou . Alpha-Correlation in a Single-Level Model. Chinese Physics C, 1988, 12(S1): 91-98.

Access

Get Citation

YIN Cheng-Ke, DAI Zhi-Min, LIU Jian-Fei, ZHAO Yu-Bin, ZHANG Tong-Xuan, FU Ze-Chuan and LIU Wei-Qing. A non-IQ sampling controller in low level RF system[J]. Chinese Physics C, 2008, 32(10): 852-856. doi: 10.1088/1674-1137/32/10/018

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2007-11-23
Revised: 2008-03-19

Article Metric

Article Views(3478)
PDF Downloads(899)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

A non-IQ sampling controller in low level RF system

Corresponding author: YIN Cheng-Ke,

Received Date: 2007-11-23

Accepted Date: 2008-03-19

Available Online: 2008-10-05

Abstract:

This paper describes a non-IQ controller for digital Low Level RF (LLRF) feedback control. Based on this non-IQ sampling method, arbitrary frequency relationship between ADC/DAC sampling clocks and IF signals can be employed. The nonlinearity in digital conversion can be reduced and the system dynamic performance improved. This paper analyzes the nonlinearity in conventional IQ sampling, gives the state variable description of the non-IQ algorithm, presents an implementation and its synchronization, and compares its performances with IQ sampling.

HTML

Reference (1)

A non-IQ sampling controller in low level RF system

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article