25 years of technical advances in RFQ accelerators

Young, L.M.

doi:10.1109/pac.2003.1288841

Cited by 8 publications

(7 citation statements)

References 11 publications

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“…The beam test has been performed using 4 He + beam. The output current and transmission efficiency of the ladder IH-RFQ varying with the rf power fed into it are shown in Fig.…”

Section: Experimental Studies On the Ladder Ih-rfqmentioning

confidence: 99%

“…The details of its principle and development could be found in many literatures [2,3] . Taking advantages of its high current, compact size and good ion selectivity, etc, RFQ has been used widely in the field of particle accelerator, after 40 years' development both in the beam dynamics design and in the rf cavity structure [4] . At present, RFQs can provide high current (up to hundreds mA) ion beams at energy level of MeV over the mass range from Hydrogen to Uranium and the 5 MHz to 500 MHz frequency range [5] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Nie¹,

Lu²,

Yan³

et al. 2012

Ion Implantation

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“…The beam test has been performed using 4 He + beam. The output current and transmission efficiency of the ladder IH-RFQ varying with the rf power fed into it are shown in Fig.…”

Section: Experimental Studies On the Ladder Ih-rfqmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Nie¹,

Lu²,

Yan³

et al. 2012

Ion Implantation

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“…In light ion accelerators, 4-vane RFQs [2] are widely used. The 4-vanes are used to support quadrupole E-field between the vane tips.…”

Section: Introductionmentioning

confidence: 99%

Radio frequency quadrupole cavity structure for particle accelerators — Simulation and measurements

Shin

Kang

Champion

et al. 2013

2013 IEEE MTT-S International Microwave Symposium Digest (MTT)

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EM simulation of long RFQ with quadruple ridge (vane) waveguide structure with narrow vane gaps and vane end cutbacks is a complex and challenging task. Advances in 3-D EM simulation tools in recent years can lead to accurate analysis of such structures. Here, we present the simulation of long RFQs (over 2Ȝ), validate our results with measurements, compare simulated results of eigenmode frequencies and field distribution to measured values, and finally extend our analysis to an alternative and very promising design noted as double dipole structure. Excellent agreement between measurement and simulation has been attained and design comparison between the long double dipole and the traditional RFQs has been developed.

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“…R ADIO frequency quadrupole (RFQ) structures are used in front-end acceleration of protons or heavy ions in linear accelerators (LINAC) [1]- [4]. The distance between the vane tips is the most sensitive part of the RFQ structure [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Electromagnetic Field Perturbation With Respect to Mechanical Imperfections in Radio-Frequency Quadrupole (RFQ) Structure

Shin

Kang

Kim

et al. 2012

IEEE Trans. Nucl. Sci.

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Electromagnetic (EM) fields near the beam axis in a radio frequency quadrupole (RFQ) are very sensitive to dimensional changes especially on vane tip geometries. Due to measurement difficulties, field distribution around the beam axis is generally assumed to be equal to that measured outside of vane gaps in quadrants using a bead-pull technique. If an RFQ structure has any mechanical imperfections in its vanes, local field distributions around the beam axis could be different from the design field profiles. The distorted field may affect beam quality as well as the operational stability and reliability of the RFQ system. In order to understand changes of field distribution in the RFQ against localized mechanical imperfections, a study with systematic 3D simulations has been carried out using a model developed for the RFQ in Spallation Neutron Source (SNS) of Oak Ridge National Laboratory. Field information at various locations such as around the beam-axis, bead-pull positions, and pickup probe positions are investigated with the vane tip perturbations. Design considerations for proper field retuning with perturbation are also presented and discussed to help future RFQ designs.Index Terms-Field distribution, mechanical imperfection, radio frequency quadrupole (RFQ).

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25 years of technical advances in RFQ accelerators

Cited by 8 publications

References 11 publications

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Radio frequency quadrupole cavity structure for particle accelerators — Simulation and measurements

Investigation of Electromagnetic Field Perturbation With Respect to Mechanical Imperfections in Radio-Frequency Quadrupole (RFQ) Structure

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25 years of technical advances in RFQ accelerators

Cited by 8 publications

References 11 publications

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Radio Frequency Quadrupole Accelerator: A High Energy and High Current Implanter

Radio frequency quadrupole cavity structure for particle accelerators &#x2014; Simulation and measurements

Investigation of Electromagnetic Field Perturbation With Respect to Mechanical Imperfections in Radio-Frequency Quadrupole (RFQ) Structure

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Radio frequency quadrupole cavity structure for particle accelerators — Simulation and measurements