Low energy beam transport for facility for rare isotope beams driver linear particle accelerator

Sun, Lixin; Leitner, D.; Machicoane, G.; Pozdeyev, E.; Smirnov, V. L.; Vorozhtsov, S.B.; Winklehner, Daniel; Zhao, Q.

doi:10.1063/1.3665968

Cited by 9 publications

(5 citation statements)

References 4 publications

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“…Each ion source has its associated LEBT line and the lines merge into one connecting with the RFQ. A similar structure can be found in Spiral-2 [5] at GANIL and FRIB [6] at MSU. After each charge selection section of the sources, a set of diagnostic devices, including two Allison-type emittance meters, a Faraday cup and a fluorescent target, are available.…”

Section: Hiaf Front Endsupporting

confidence: 66%

Heavy ion accelerator facility front end design and commissioning

Yang

Sun

Zhai

et al. 2019

Phys. Rev. Accel. Beams

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A new project, high intensity heavy ion accelerator facility (HIAF), is currently under design and construction in China. The HIAF front end, composed of electron cyclotron resonance (ECR) ion sources, low energy beam transport (LEBT) and radio frequency quadrupole (RFQ), will produce and provide beams of ions with a mass up to uranium at a beam energy of 0.5 MeV=u. The typical beam intensity is designed up to 2 emA for the uranium beam with a charge state of 35þ. This paper presents an overall design of the front end for HIAF and discusses several key issues in the design. By modeling the beam extraction from the ECR source, we got a reliable starting beam condition to perform the design. Transverse coupling of the beam from the source was elaborated. To relieve the coupling we implanted two solenoids after the source. Space charge effect in the charge state selection of the ion source was evaluated. An overall space charge compensation degree of no less than 70% was predicted. A beam dynamics simulation was performed by using the initial particle distribution obtained from the extraction modeling. The simulation resulted in development of a beam collimation system in the LEBT to confine the transverse emittance. The RFQ design will follow the development of LEAF-RFQ at Institute of Modern Physics, which has successfully commissioned with several beams and demonstrated as an excellent design. Recent beam commissioning results of LEAF-RFQ will also be presented in this paper.

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Section: Hiaf Front Endsupporting

confidence: 66%

Heavy ion accelerator facility front end design and commissioning

Yang

Sun

Zhai

et al. 2019

Phys. Rev. Accel. Beams

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“…In the simulation, we assumed all ion species have the same initial conditions with a emittance of 100 π mm mrad and Twiss parameters α = −0.5, β = 173 mm/mrad. 3 Effect of space charge has been studied and discussed in previous works, 2 indicated that such a low energy beam is very sensitive to it. However, there has not been an effective method to increase the space charge compensation for high charged ion beams.…”

Section: Simulated and Experimental Resultsmentioning

confidence: 99%

Studies on low energy beam transport for high intensity high charged ions at IMP

Yang

Sun

et al. 2013

Review of Scientific Instruments

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Superconducting Electron Cyclotron Resonance ion source with Advanced design in Lanzhou (SECRAL) is an advanced fully superconducting ECR ion source at IMP designed to be operational at the microwave frequency of 18-24 GHz. The existing SECRAL beam transmission line is composed of a solenoid lens and a 110° analyzing magnet. Simulations of particle tracking with 3D space charge effect and realistic 3D magnetic fields through the line were performed using particle-in-cell code. The results of the beam dynamics show that such a low energy beam is very sensitive to the space charge effect and significantly suffers from the second-order aberration of the analyzing magnet resulting in large emittance. However, the second-order aberration could be reduced by adding compensating sextupole components in the beam line. On this basis, a new 110° analyzing magnet with relatively larger acceptance and smaller aberration is designed and will be used in the design of low energy beam transport line for a new superconducting ECR ion source SECRAL-II. The features of the analyzer and the corresponding beam trajectory calculation will be detailed and discussed in this paper.

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“…The Low Energy Beam Transport (LEBT) [11] was designed to transport two-charge-state heavy-ion beams from the ion source to the linac with high reliability and high beam quality. To produce a small longitudinal emittance, the direct-current (dc) beam from the ion source is bunched upstream of -7 - The concept of bunching a dual-charge-state beam and injection into the RFQ is detailed in ref.…”

Section: Velocity Equalizermentioning

confidence: 99%

Technological developments and accelerator improvements for the FRIB beam power ramp-up

Wei,

Alleman,

et al. 2024

J. Inst.

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The Facility for Rare Isotope Beams (FRIB) began operation with 1 kW beam power for scientific users in May 2022 upon completion of 8 years of project construction. The ramp-up to the ultimate beam power of 400 kW, planned over a 6-year period, will enable the facility to reach its full potential for scientific discovery in isotope science and applications. In December 2023, a record-high beam power of 10.4 kW uranium was delivered to the target. Technological developments and accelerator improvements are being made over the entire facility and are key to completion of the power ramp-up. Major technological developments entail the phased deployment of high-power beam-intercepting systems, including the charge strippers, the charge selection systems, the production target, and the beam dump, along with support systems, including non-conventional utilities (NCU) and remote handling facilities. Major accelerator improvements include renovations to aging legacy systems associated with experimental beam lines and system automation for improved operational efficiency and better machine availability. Experience must be gained to safely handle the increased radiological impacts associated with high beam power; extensive machine studies and advanced beam tuning procedures are needed to minimize uncontrolled beam losses for the desired operating conditions. This paper discusses the technological developments and accelerator improvements with emphasis on major R&D efforts.

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Low energy beam transport for facility for rare isotope beams driver linear particle accelerator

Cited by 9 publications

References 4 publications

Heavy ion accelerator facility front end design and commissioning

Heavy ion accelerator facility front end design and commissioning

Studies on low energy beam transport for high intensity high charged ions at IMP

Technological developments and accelerator improvements for the FRIB beam power ramp-up

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