Fabrication of an optimized hexapole magnet for a 14.5 GHz electron cyclotron resonance ion source

Journal Article · Mon Feb 15 04:00:00 EST 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3277198· OSTI ID:22053668

Oh, Byung-Hoon; Seo, Chang Seog; In, Sang-Ryul; Kim, Tae-Seong ^[1]

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1. Department of Fusion Engineering, Korea Atomic Energy Research Institute, Daejeon 305-353 (Korea, Republic of)

A hexapole magnet for a 14.5 GHz electron cyclotron resonance (ECR) ion source, where the maximum radial field on the wall of the plasma chamber is higher than 1.1 T, has been designed and fabricated. The size of the outer diameter and the number of the sector of the hexapole are optimized for a 14.5 GHz ECR ion source with the help of a three-dimensional field calculation code. Moreover, to make a strong and long-life magnet against the demagnetic field on the hexapole multilayered structure in radial and axial directions is considered in the design. The distributions of the demagnetic fields are estimated by the calculation of the radial field in a hexapole magnet and the axial field from the solenoid coils. Proper grades of magnetic materials depending on the strength of the demagnetic field are applied for the different layers. The magnetic fields of the measured and calculated ones have been compared.

• OSTI ID: 22053668
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 2 Vol. 81; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DESIGN
ECR ION SOURCES
ELECTRON CYCLOTRON-RESONANCE
GHZ RANGE
HEXAPOLES
MAGNETIC FIELDS
MAGNETIC MATERIALS
PERMANENT MAGNETS
PLASMA
SOLENOIDS
SPATIAL DISTRIBUTION
THREE-DIMENSIONAL CALCULATIONS