Dipole Field in Four Vane and Four Rod RFQ

DU Xiaonan; HE Yuan; SHI Aimin; SUN Liepeng; ZHANG Zhouli; PAN Gang; SHI Longbo

doi:10.11804/NuclPhysRev.30.04.420

PDF
Cite
Share
facebook

twitter

google

linkedin

Volume 30 Issue 4

Turn off MathJax

Article Contents

Article Navigation > Nuclear Physics Review > 2013 > 30(4): 420-424

DU Xiaonan, HE Yuan, SHI Aimin, SUN Liepeng, ZHANG Zhouli, PAN Gang, SHI Longbo. Dipole Field in Four Vane and Four Rod RFQ[J]. Nuclear Physics Review, 2013, 30(4): 420-424. doi: 10.11804/NuclPhysRev.30.04.420

Citation:

DU Xiaonan, HE Yuan, SHI Aimin, SUN Liepeng, ZHANG Zhouli, PAN Gang, SHI Longbo. Dipole Field in Four Vane and Four Rod RFQ[J]. Nuclear Physics Review, 2013, 30(4): 420-424. doi: 10.11804/NuclPhysRev.30.04.420

Dipole Field in Four Vane and Four Rod RFQ

doi: 10.11804/NuclPhysRev.30.04.420

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2013-12-20

Abstract

Radio Frequency Quadruple(RFQ) is the most important front-end acceleration structure in linear accelerators.It can focus and accelerate beam in longitudinal and transversal direction, simultaneously. Symmetric of electric field in acceleration aperture is very important for the beam dynamics. To an idea RFQ, there is only quadruple electric field in the acceleration aperture. The dipole field in aperture is harmful and need be as small as possible. The methods to reduce it are studied in a four-rod RFQ and a four-vane RFQ in the article ndependently. To a four-vane RFQ, the symmetrical double-port couplers are employed to counteract the neighboring dipole modes. The availability is confirmed by the simulation with the 3-D Finite Element tool, CST-MWS. And it is also observed by measuring a model-cavity with a symmetrical double-port couplers. To a four-rod RFQ, a new structure of stems is proposed to reduce the dipole mode.
Taking the RFQ for the SSC-LINAC project as example, the dipole mode contributions to the electric filed is completely eliminated by selecting stem’s parameters carefully. It is confirmed by the simulation of CST-MWS. heoretically, this method is independent with the frequency of an RFQ and serves for all RFQs with 4-rod or 4-wane structure.
- Linear accelerator,
- 4-rod RFQ,
- 4-wane RFQ,
- Dipole Mode,
- finite-element simulation
References
Proportional views

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

Get Citation

PDF

XML

Article Metrics

Article views(2102) PDF downloads(625) Cited by()

Proportional views

Dipole Field in Four Vane and Four Rod RFQ

doi: 10.11804/NuclPhysRev.30.04.420

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2013-12-20

Key words:

Abstract: Radio Frequency Quadruple(RFQ) is the most important front-end acceleration structure in linear accelerators.It can focus and accelerate beam in longitudinal and transversal direction, simultaneously. Symmetric of electric field in acceleration aperture is very important for the beam dynamics. To an idea RFQ, there is only quadruple electric field in the acceleration aperture. The dipole field in aperture is harmful and need be as small as possible. The methods to reduce it are studied in a four-rod RFQ and a four-vane RFQ in the article ndependently. To a four-vane RFQ, the symmetrical double-port couplers are employed to counteract the neighboring dipole modes. The availability is confirmed by the simulation with the 3-D Finite Element tool, CST-MWS. And it is also observed by measuring a model-cavity with a symmetrical double-port couplers. To a four-rod RFQ, a new structure of stems is proposed to reduce the dipole mode.
Taking the RFQ for the SSC-LINAC project as example, the dipole mode contributions to the electric filed is completely eliminated by selecting stem’s parameters carefully. It is confirmed by the simulation of CST-MWS. heoretically, this method is independent with the frequency of an RFQ and serves for all RFQs with 4-rod or 4-wane structure.

Citation: