Tuning of RF amplitude and phase for the drift tube linac in J-PARC

SHEN Guo-Bao; Masanori Ikegami

doi:10.1088/1674-1137/33/7/014

Chinese Physics C> 2009, Vol. 33> Issue(7) : 577-582 DOI: 10.1088/1674-1137/33/7/014

Tuning of RF amplitude and phase for the drift tube linac in J-PARC

SHEN Guo-Bao ^, ,
Masanori Ikegami

Abstract
HTML
Reference
Related

PDF

Abstract：
The J-PARC linac has three DTL tanks to accelerate the negative hydrogen ions
from 3 MeV to 50 MeV. The RF phase and amplitude are adjusted for each
cavity with a phase scan method within the accuracy of 1° in phase and
1% in amplitude. The experimental results show a remarkable agreement
with the numerical model within a sufficient margin in the tuning of the last two DTL tanks. However, a notable discrepancy between the experiment and the numerical model is seen in the tuning of the first DTL tank. After studying with a three-dimensional multi-particle simulation, the generation of the low energy component and the pronounced filamentation are identified as the main causes of the discrepancy. The optimization of the tuning scheme is also discussed to attain the tuning goal accuracy for the first DTL tank.

References

[1]

. Yamazaki Y. The JAERI-KEK Joint Project for the High-Intensity Proton Accelerator, J-PARC. Procs of the 20th Particle Accelerator Conference. Portland, USA, 2003. 5762. Yamazaki Y. Accelerator Technical Design Report for JPARC,KEK Report 2003-13 and JAERI-Tech 2003-443. For example, Barnard J J, Lund S M. Theory of Longitudinal Beam Halo in RF Linacs I: core/test-particle formulation.Proceedings of the 1997 Particle Accelerator Conference.Vancouver, 1997. 19294. Ikegami M, Ohkawa T, Kondo Y et al. A Simulation Study on Error Effects in J-PARC Linac. Proceedings ofLINAC2004. Lubeck, Germany, 2004. 3455. Owen T L, Popovic M B, McCrory E S et al. Part. Accel.,1994, 48: 1696. Takeda H. PARMILA, Los Alamos National Laboratory Report LA-UR-98-44877. Qiang J, Ryne R D, Habib S et al. J. Comput. Phys., 2000,163: 4348. Kondo Y, Ueno A, Ikegami M et al. Particle Distributionat the Exit of the J-PARC RFQ. Proceedings of LINAC2004. Lubeck, Germany, 2004. 789. Galambos J, Aleksandrov A, Deibele C et al. PASTA -An RF Phase Scan and Tuning Application. Proceedings of Particle Accelerator Conference 2005. Knoxville, USA,2005. 149110. Jeon D. Nucl. Instrum. Methods A, 2007, 578: 37

[1]	ZHAO Dan-Yang , WANG Guang-Wei , PAN Wei-Min , SUN Yi , QIU Feng , ZHANG Juan , MI Zheng-Hui , LIN Hai-Ying , SHA Peng , WANG Qun-Yao , XU Bo , MA Qiang . High accuracy amplitude and phase measurements based on a double heterodyne architecture. Chinese Physics C, 2015, 39(1): 017002. doi: 10.1088/1674-1137/39/1/017002
[2]	GENG Hao , ZHAO Zhong-Jun , DUAN Yi-Xiang . Ion behavior and interelectrode breakdown voltage of a drift tube. Chinese Physics C, 2015, 39(5): 057003. doi: 10.1088/1674-1137/39/5/057003
[3]	ZHANG Rui , XIAO Dong , AN Fen-Fen , GAO Yuan-Ning , HE Kang-Lin , JI Xiao-Bin , JIN Shan , LI Wei-Dong , LI Wei-Guo , LIU Huai-Min , LIU Kai , SHEN Xiao-Yan , WANG Yi-Fang , WU Ling-Hui , XU Qing-Nian , YUAN Ye , ZHANG Yao , ZHAO Guang , ZHENG Yang-Heng . Improvement of main drift chamber Monte-Carlo tuning model at BESⅢ. Chinese Physics C, 2014, 38(2): 026201. doi: 10.1088/1674-1137/38/2/026201
[4]	DOU Wei-Ping , HE Yuan , LU Yuan-Rong . Beam dynamics design for uranium drift tube linear accelerator. Chinese Physics C, 2014, 38(7): 077001. doi: 10.1088/1674-1137/38/7/077001
[5]	YIN Xue-Jun , LI A-Hong , XIAO Yong-Chuang , CHEN Qiang , LIU Hua-Chang , GONG Ke-Yun , FU Shi-Nian . Preliminary study on the RF tuning of CSNS DTL. Chinese Physics C, 2014, 38(2): 027002. doi: 10.1088/1674-1137/38/2/027002
[6]	MI Zheng-Hui , SUN Yi , PAN Wei-Min , WANG Guang-Wei , LI Zhong-Quan , DAI Jian-Ping , MA Qiang , LIN Hai-Ying , XU Bo , HUANG Hong , WANG Qun-Yao , XU Yu-Fen , ZHAO Guang-Yuan , HUANG Tong-Ming , SHA Peng , ZHANG Xin-Ying , MENG Fan-Bo , LI Han , CHEN Xu , ZHAO Dan-Yang , ZHANG Juan , PENG Ying-Hua . A tuning system for BEPCⅡ. Chinese Physics C, 2013, 37(8): 087003. doi: 10.1088/1674-1137/37/8/087003
[7]	LI A-Hong , YIN Xue-Jun , FU Shi-Nian , SUN Zhi-Rui . Application of the transfer matrix for tuning the CSNS-DTL. Chinese Physics C, 2011, 35(10): 959-963. doi: 10.1088/1674-1137/35/10/014
[8]	ZHOU Quan-Feng , ZHU-Kun , LU Yuan-Rong , GAO Shu-Li , KANG Ming-Lei , YAN Xue-Qing , GUO Zhi-Yu , CHEN Jia-Er . Simulation and experiments of rf tuning of a 201.5 MHz four-rod RFQ cavity. Chinese Physics C, 2011, 35(11): 1042-1046. doi: 10.1088/1674-1137/35/11/012
[9]	WANG Fang , LIN Lin , ZHANG He , HAO Jian-Kui , ZHANG Bao-Cheng , LIU Ke-Xin . Amplitude and phase stability studies in a DC superconducting injector. Chinese Physics C, 2011, 35(9): 855-858. doi: 10.1088/1674-1137/35/9/013
[10]	LI Zheng-Hong , XIE Hong-Quan . RF phase jitter in a klystron amplifier. Chinese Physics C, 2011, 35(9): 851-854. doi: 10.1088/1674-1137/35/9/012
[11]	YANG Liu , HE Fei-Si , XU Wen-Can , ZHU Feng , LU Xiang-Yang , ZHAO Kui . Tuning for the first 9-cell TESLA cavity of PKU. Chinese Physics C, 2010, 34(4): 496-498. doi: 10.1088/1674-1137/34/4/015
[12]	SHAN Hong-Yun , ZHANG Ai-Lin . D and D_s in mass loaded flux tube. Chinese Physics C, 2010, 34(1): 16-21. doi: 10.1088/1674-1137/34/1/003
[13]	WU Zhi , LIU Jian-Bei , QIN Zhong-Hua , WU Ling-Hui , CHEN Chang , CHEN Yuan-Bo , CHEN Ma-Li , CHEN Xi-Hui , DONG Ming-Yi , GUAN Bei-Ju , HUANG Jie , JIANG Xiao-Shan , JIN Yan , LI Fei , LI Ren-Ying , LI Xiao-Nan , LEI Guang-Kun , LIU Rong-Guang , LUO Xiao-Lan , MA Xiao-Yan , SHENG Hua-Yi , SUN Han-Sheng , TANG Xiao , WANG Lan , WANG Liang , XU Mei-Hang , ZHANG Jian , ZHANG Hong-Yu , ZHANG Yin-Hong , ZHAO Yu-Bin , ZHAO Ping-Ping , ZHU Ke-Jun , ZHU Qi-Ming , ZHUANG Bao-An . Tuning of the cosmic-ray test system of the BESⅢ drift chamber. Chinese Physics C, 2010, 34(7): 983-987. doi: 10.1088/1674-1137/34/7/010
[14]	T. Nagae . Physics prospects at J-PARC. Chinese Physics C, 2010, 34(9): 1259-1262. doi: 10.1088/1674-1137/34/9/020
[15]	Tsutomu Mibe , for the , PARC g . New g－2 experiment at J-PARC. Chinese Physics C, 2010, 34(6): 745-748. doi: 10.1088/1674-1137/34/6/022
[16]	LIU Rong , WANG Zheng , PAN Wei-Min , WANG Guang-Wei , LIN Hai-Ying , SHA Peng , ZENG Ri-Hua . FPGA-based amplitude and phase detection in DLLRF. Chinese Physics C, 2009, 33(7): 594-598. doi: 10.1088/1674-1137/33/7/017
[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]	PENG Jun , SUN Zhi-Rui , FU Shi-Nian . A new tuning procedure for the DTL RF field pattern. Chinese Physics C, 2008, 32(2): 146-150. doi: 10.1088/1674-1137/32/2/014
[19]	Zhang Mutian , Xu Taoguang , Zhou Linong , Guo Weiming . Design of Identical Cavity Coupled-Cavity Drift Tube Linac (CCDTL) Tanks. Chinese Physics C, 1999, 23(12): 1223-1230.
[20]	Li Huantie . The Gas Gain of a Proportional Tube. Chinese Physics C, 1989, 13(S4): 331-340.

Access

Get Citation

SHEN Guo-Bao and Masanori Ikegami. Tuning of RF amplitude and phase for the drift tube linac in J-PARC[J]. Chinese Physics C, 2009, 33(7): 577-582. doi: 10.1088/1674-1137/33/7/014

SHEN Guo-Bao and Masanori Ikegami. Tuning of RF amplitude and phase for the drift tube linac in J-PARC[J]. Chinese Physics C, 2009, 33(7): 577-582. doi: 10.1088/1674-1137/33/7/014 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2008-09-09
Revised: 2008-10-31

Article Metric

Article Views(1423)
PDF Downloads(1675)
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, [email protected]

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Tuning of RF amplitude and phase for the drift tube linac in J-PARC

Corresponding author: SHEN Guo-Bao,

Received Date: 2008-09-09

Accepted Date: 2008-10-31

Available Online: 2009-07-05

Abstract:

The J-PARC linac has three DTL tanks to accelerate the negative hydrogen ions
from 3 MeV to 50 MeV. The RF phase and amplitude are adjusted for each
cavity with a phase scan method within the accuracy of 1° in phase and
1% in amplitude. The experimental results show a remarkable agreement
with the numerical model within a sufficient margin in the tuning of the last two DTL tanks. However, a notable discrepancy between the experiment and the numerical model is seen in the tuning of the first DTL tank. After studying with a three-dimensional multi-particle simulation, the generation of the low energy component and the pronounced filamentation are identified as the main causes of the discrepancy. The optimization of the tuning scheme is also discussed to attain the tuning goal accuracy for the first DTL tank.

HTML

Reference (1)

Tuning of RF amplitude and phase for the drift tube linac in J-PARC

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, [email protected]

Email This Article