Design of a capacitive main power coupler for RF superconducting accelerators

HE Fei-Si; HAO Jian-Kui; ZHANG Bao-Cheng; ZHAO Kui

doi:10.1088/1674-1137/32/7/015

Chinese Physics C> 2008, Vol. 32> Issue(7) : 584-588 DOI: 10.1088/1674-1137/32/7/015

Design of a capacitive main power coupler for RF superconducting accelerators

Abstract
HTML
Reference
Related

PDF

Abstract：
An updated main coupler has been designed for the superconducting accelerator of Free Electron Laser (FEL) project under construction in Peking University. A capacitive structure is chosen for the main coupler. Numerical investigation using CST Microwave Studio demonstrates the cold window part. The other nonstandard structures such as holding rods and antenna are also optimized. The coupler uses a 95% purity Al₂O₃ ceramic cold window. The VSWR (Vottage Standing Wave Ratio) is 1.02 at 1.3GHz and the frequency bandwidth is 45MHz with VSWR<1.1. The electric field intensity is 8.5×10^－2kV/mm around the window with 20kW Continuous Wave (CW) transmitted power. The Q_ext is designed variable from 5×10⁶ to 1×10⁷.

References

[1]

. Garvey T. Physica C, 2006, 441: 2092. Matsumoto H, Kazacov S, Saito K. A New Design for a Super-Conducting Cavity Input Coupler. In: Horak C ed.Proceedings of the Particle Accelerator Conference. USA:Institute of Electrical and Electronics Engineers, Inc., 2005,4141-41433. ZHU Feng, QUAN Sheng-Wen, JIAO Fei et al. High Power Laser and Particle Beams, 2006, 18(4): 653 (in Chinese)4. CHU Xiang-Qiang. The Electron Beam Transportation of PKU-FEL. Beijing: Peking University, 2005 (in Chinese)5. Matsumoto H. High Power Coupler Issues in Normal Con-ducting and Superconducting Accelerator Applications. In:A. Luccio, W. MacKay ed. Proceeding of the 1999 Particle Accelerator Conference. USA: Institute of Electrical and Electronics Engineers, Inc., 1999, 536-5406. Hasan Padamsee, Jens Knobloch, Tom Hays. RF Supercon-ductivity for Accelerators. New York: John Wiley Sons,Inc., 1998. 179-197, 4157. ZHANG Ju-Xian. Journal of Vacuum Science and Technol-ogy (China), 2006, 26(1): 77 (in Chinese)8. David M Pozar. Microwave Engineering (second edition).United States of America: John Wiley Sons, Inc., 1998.56-86

[1]	Kui-Xiang Gu , Feng Bing , Wei-Min Pan , Tong-Ming Huang , Qiang Ma , Fan-Bo Meng . Development of fundamental power coupler for C-ADS superconducting elliptical cavities. Chinese Physics C, 2017, 41(6): 067001. doi: 10.1088/1674-1137/41/6/067001
[2]	Hong-Juan Zheng , Jie Gao , Zhen-Chao Liu . Cavity and HOM coupler design for CEPC. Chinese Physics C, 2016, 40(5): 057001. doi: 10.1088/1674-1137/40/5/057001
[3]	YAN Fang , LI Zhi-Hui , MENG Cai , TANG Jing-Yu , SUN Biao . Physics design for the C-ADS main linac based on two different injector design schemes. Chinese Physics C, 2014, 38(2): 027004. doi: 10.1088/1674-1137/38/2/027004
[4]	CHEN Xu , MENG Fan-Bo , MA Qiang , HUANG Tong-Ming , LIN Hai-Ying , PAN Wei-Min . Coupler conditioning and high power testing of ADS Spoke cavity. Chinese Physics C, 2014, 38(2): 027001. doi: 10.1088/1674-1137/38/2/027001
[5]	MENG Fan-Bo , CHEN Xu , PAN Wei-Min , HUANG Tong-Ming , MA Qiang , LIN Hai-Ying , PENG Xiao-Hua . Study and design of RF coupler for Chinese ADS HWR superconducting cavity. Chinese Physics C, 2014, 38(11): 117002. doi: 10.1088/1674-1137/38/11/117002
[6]	YANG Xiao-Liang , MA Li-Zhen , WU Wei , ZHENG Shi-Jun , DU Jun-Jie , HAN Shao-Fei , GUAN Ming-Zhi , HE Yuan . Design of a superconducting magnet for CADS. Chinese Physics C, 2012, 36(9): 886-890. doi: 10.1088/1674-1137/36/9/016
[7]	PAN Wei-Min , HUANG Tong-Ming , MA Qiang , WANG Guang-Wei , LIN Hai-Ying , ZHAO Guang-Yuan , SUN Yi , XU Bo , WANG Qun-Yao , SHA Peng . Development of a 500 MHz high power RF test stand. Chinese Physics C, 2012, 36(4): 355-361. doi: 10.1088/1674-1137/36/4/011
[8]	ZHAO Wei , TANG Xiao , SHI Rong-Jian , HOU Mi . Coupler design for an L-band electron linac. Chinese Physics C, 2012, 36(8): 765-768. doi: 10.1088/1674-1137/36/8/015
[9]	LU Chang-Wang , LIU Jian-Fei , HOU Hong-Tao , MA Zhen-Yu , MAO Dong-Qing , FENG Zi-Qiang , ZHAO Shen-Jie , LUO Chen , ZHAO Yu-Bin , ZHANG Zhi-Gang , ZHENG Xiang , WEI Ye-Long , YU Hai-Bo , LI Zheng , XU Kai . Design and simulation of a new type of 500 MHz single-cell superconducting RF cavity. Chinese Physics C, 2012, 36(5): 447-451. doi: 10.1088/1674-1137/36/5/012
[10]	PEI Shi-Lun , Chris E , LI Zeng-Hai , Nikolay A , Ivan V . RF thermal and new cold part design studies on a TTF-Ⅲ input coupler for Project-X. Chinese Physics C, 2012, 36(2): 173-178. doi: 10.1088/1674-1137/36/2/013
[11]	XIAO Yong-Chuan , YIN Xue-Jun , MU Zhen-Cheng , FU Shi-Nian . Study on the HOMs coupler design of spoke cavity. Chinese Physics C, 2011, 35(2): 188-192. doi: 10.1088/1674-1137/35/2/016
[12]	LIU Hua-Chang , PENG Jun , YIN Xue-Jun , OUYANG Hua-Fu , FU Shi-Nian . RF power coupling for the CSNS DTL. Chinese Physics C, 2011, 35(1): 92-95. doi: 10.1088/1674-1137/35/1/019
[13]	YAN Fang . Power coupler kick of the TRIUMF ICM capture cavities. Chinese Physics C, 2011, 35(6): 590-595. doi: 10.1088/1674-1137/35/6/016
[14]	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
[15]	LIU Zhen-Chao . Design and study of a high-current 5-cell superconducting rf cavity. Chinese Physics C, 2010, 34(5): 603-605. doi: 10.1088/1674-1137/34/5/018
[16]	WANG Sheng , FANG Shou-Xian , FU Shi-Nian , LIU Wei-Bin , OUYANG Hua-Fu , QIN Qing , TANG Jing-Yu , WEI Jie . Introduction to the overall physics design of CSNS accelerators. Chinese Physics C, 2009, 33(S2): 1-3. doi: 10.1088/1674-1137/33/S2/001
[17]	HAO Jian-Kui , ZHAO Kui . Recent progress on RF superconducting cavities. Chinese Physics C, 2009, 33(10): 930-934. doi: 10.1088/1674-1137/33/10/020
[18]	PAN Wei-Min , HUANG Tong-Ming , MA Qiang , WANG Guang-Wei , SUN Yi , SHA Peng , LI Zhong-Quan , LIN Hai-Ying , XU Bo . High power conditioning of the input coupler for BEPCⅡ superconductingcavity. Chinese Physics C, 2008, 32(9): 766-768. doi: 10.1088/1674-1137/32/9/017
[19]	HUANG Tong-Ming , MA Qiang , PAN Wei-Min , WANG Guang-Wei . Fabrication of the high power input coupler for BEPCⅡ superconducting cavities. Chinese Physics C, 2008, 32(11): 931-933. doi: 10.1088/1674-1137/32/11/017
[20]	Ma Jimao , Mao Huishun , Bai Jingzhi , Xie Peipei , Yan Jie , Wang Yaohui , Mao Zepu , Liu Rongguang , Shen Benwei , Song Xiaofei , Zhou Jie , Wu Zhendong , Fan Qun , Jin Yan , Rong Gang . The Design and Construction of the BES Main Drift Chamber. Chinese Physics C, 1990, 14(S4): 325-337.

Access

Get Citation

HE Fei-Si, HAO Jian-Kui, ZHANG Bao-Cheng and ZHAO Kui. Design of a capacitive main power coupler for RF superconducting accelerators[J]. Chinese Physics C, 2008, 32(7): 584-588. doi: 10.1088/1674-1137/32/7/015

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2007-09-07
Revised: 2007-12-08

Article Metric

Article Views(3517)
PDF Downloads(721)
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

Design of a capacitive main power coupler for RF superconducting accelerators

Corresponding author: HE Fei-Si,

Received Date: 2007-09-07

Accepted Date: 2007-12-08

Available Online: 2008-07-05

Abstract:

An updated main coupler has been designed for the superconducting accelerator of Free Electron Laser (FEL) project under construction in Peking University. A capacitive structure is chosen for the main coupler. Numerical investigation using CST Microwave Studio demonstrates the cold window part. The other nonstandard structures such as holding rods and antenna are also optimized. The coupler uses a 95% purity Al₂O₃ ceramic cold window. The VSWR (Vottage Standing Wave Ratio) is 1.02 at 1.3GHz and the frequency bandwidth is 45MHz with VSWR<1.1. The electric field intensity is 8.5×10^－2kV/mm around the window with 20kW Continuous Wave (CW) transmitted power. The Q_ext is designed variable from 5×10⁶ to 1×10⁷.

HTML

Reference (1)

Design of a capacitive main power coupler for RF superconducting accelerators

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article