Determination of Ion Confinement Time in RIKEN 18 GHz Electron Cyclotron    Resonance Ion Source (ECRIS) under Pulsed Mode Operation

Nakagawa, T.; Miyazawa, Yoshitoshi; Hemmi, M.; Chiba, Tetsuhiro; Inabe, N.; Kase, M.; Kageyama, Tadashi; Kamigaito, O.; Gotō, Akira; Yano, Y.

doi:10.1143/jjap.35.l1124

Cited by 7 publications

(1 citation statement)

References 12 publications

(12 reference statements)

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“…Wall coating [4] in the inner wall of plasma chamber was attempted in order to supply more electrons. The afterglow effect drastically improved beam intensity by one order of magnitude through injection of a pulsed microwave Ý Email: cslee@cau.ac.kr [5]. Despite of these attempts, the only small fraction of the whole plasma still participates in the resonance of microwaves and electrons in this case.…”

Section: Introductionmentioning

confidence: 99%

Design of a compact ECR ion source with Ku band

Lee

Kwon²,

Tojyo³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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The electron cyclotron resonance (ECR) ion sources are increasingly popular for producing highly charged ions. With worldwide proposals to build the Isotope Seperator OnLine (ISOL) facility being at hand, it becomes important to design a high efficiency ion source as a charge breeder for the secondary beam. A novel type of ECR ion source based on a flat magnetic field configuration has been proposed by Alton et al. [1,2] This source provides a large, on-axis electron cyclotron resonance region, "ECR-volume". Due to a larger ECR zone, absorptivity of microwave power into plasma is much increased, thereby electron becomes so hot. And hot electron population of the plasma could result in higher charge states and higher beam intensity. Two sloenoids are used to produce axial mirror magnetic field. Twelve permanent magnets (NdFeB) are designed for confining the hot electrons in the radial direction. Moreover, specially designed iron yokes are added to create the flat central field region. The single injected microwave frequency is tunable in the range of 6.45 to 14 GHz covering the range of the Ku band. We shall present the design report concerning the field mapping obtained by POISSON and OPERA-3D together with and mechanical design.

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Section: Introductionmentioning

confidence: 99%

Design of a compact ECR ion source with Ku band

Lee

Kwon²,

Tojyo³

et al.

Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366)

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show abstract

Production of highly charged ions in the RIKEN 18 GHz ECR ion source using an electrode in two modes

Biri

Nakagawa

Kidera

et al. 1999

Nuclear Instruments and Methods in Physics Research Section B:

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Numerical simulation of highly charged ion production in RIKEN 18 GHz electron cyclotron resonance ion source

Shirkov

Nakagawa

1998

Review of Scientific Instruments

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Numerical codes based on the model of ion confinement and losses in the electron cyclotron resonance (ECR) source have been applied to the mathematical simulation of krypton and xenon ion production in the 18 GHz ECR ion source at RIKEN. An equation of complete plasma energy is introduced to estimate the rf power of the ECR plasma heating. The final result of fitting is in reasonable agreement with the real experimental data for the Kr and Xe ion production in the source and used to estimate the main plasma parameters.

show abstract

Determination of Ion Confinement Time in RIKEN 18 GHz Electron Cyclotron Resonance Ion Source (ECRIS) under Pulsed Mode Operation

Cited by 7 publications

References 12 publications

Design of a compact ECR ion source with Ku band

Design of a compact ECR ion source with Ku band

Production of highly charged ions in the RIKEN 18 GHz ECR ion source using an electrode in two modes

Numerical simulation of highly charged ion production in RIKEN 18 GHz electron cyclotron resonance ion source

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