Beam Dynamics and Electromagnetic Design Studies of 3 MeV RFQ for SNS Programme

Gaur, Rahul; Shrivastava, Purushottam

doi:10.4236/jemaa.2010.29068

Cited by 5 publications

(7 citation statements)

References 3 publications

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“…In general, a longitudinal magnetic field is induced in an RFQ cavity and should be parallel to both the entrance and exit plates. The vane cutback is designed to solve the boundary value problem [9]. The cutback was designed using CST code to maintain the resonant frequency of 161.0 MHz.…”

Section: Three-dimensional Cavity Designmentioning

confidence: 99%

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Design study of a radio-frequency quadrupole for high-intensity beams

2017

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The Rare isotope Accelerator Of Newness (RAON) heavy-ion accelerator has been designed for the Rare Isotope Science Project (RISP) in Korea. The RAON will produce heavy-ion beams from 660-MeV-proton to 200-MeV/u-uranium with continuous wave (CW) power of 400 kW to support research in various scientific fields. Its system consists of an ECR ion source, LEBTs with 10 keV/u, CW RFQ accelerator with 81.25 MHz and 500 keV/u, a MEBT system, and a SC linac. In detail, the driver linac system consists of a Quarter Wave Resonator (QWR) section with 81.25 MHz and a Half Wave Resonator (HWR) section with 162.5 MHz, Linac-1, and a Spoke Cavity section with 325 MHz, Linac-2. These linacs have been designed to optimize the beam parameters to meet the required design goals. At the same time, a light-heavy ion accelerator with high-intensity beam, such as proton, deuteron, and helium beams, is required for experiments. In this paper, we present the design study of the high intensity RFQ for a deuteron beam with energies from 30 keV/u to 1.5 MeV/u and currents in the mA range. This system is composed of an Penning Ionization Gauge ion source, short LEBT with a RF deflector, and shared SC Linac. In order to increase acceleration efficiency in a short length with low cost, the 2nd harmonic of 162.5 MHz is applied as the operation frequency in the D + RFQ design. The D + RFQ is designed with 4.97 m, 1.52 bravery factor. Since it operates with 2nd harmonic frequency, the beam should be 50% of the duty factor while the cavity should be operated in CW mode, to protect the downstream linac system. We focus on avoiding emittance growth by the space-charge effect and optimizing the RFQ to achieve a high transmission and low emittance growth. Both the RFQ beam dynamics study and RFQ cavity design study for two and three dimensions will be discussed.

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Section: Three-dimensional Cavity Designmentioning

confidence: 99%

“…Figure 2 shows that the output beam energy per length is dependent on the RFQ operation frequency [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. W. Kilpatrick showed that discharge in a vacuum depends on the frequency, as in the following formula [17]:…”

Section: Introductionmentioning

confidence: 99%

Design study of a radio-frequency quadrupole for high-intensity beams

2017

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“…Before we discuss the modes supported by the 352.2 MHz RFQ for the proposed ISNS project [3], we briefly describe the basic design here for completeness. The RFQ is designed to accelerate a 50 keV H − beam from the ion source to 3 MeV.…”

Section: Mode Separation Studymentioning

confidence: 99%

“…An RFQ linac has thus become essential component of large scale ion accelerators worldwide. There is a proposal to build an Indian Spallation Neutron Source (ISNS) at Raja Ramanna Centre for Advanced Technology (RRCAT), Indore for which an RFQ operating at 352.2 MHz has been designed [3], for accelerating a 30 mA H − beam from a 50 keV ion source to 3 MeV. A four vane type structure is more efficient for the RFQ at higher frequency, and has therefore been chosen for the design presented in ref.…”

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confidence: 99%