First results from the new RIKEN superconducting electron cyclotron resonance ion source (invited)

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

DOI:https://doi.org/10.1063/1.3259232· OSTI ID:22053671

Nakagawa, T; Higurashi, Y; Ohnishi, J; Okuno, H; Kusaka, K; Kidera, M; Ikezawa, E; Fujimaki, M; Sato, Y; Watanabe, Y; Komiyama, M; Kase, M; Goto, A; Kamigaito, O; Yano, Y ^[1]; Aihara, T; Tamura, M; Uchiyama, A ^[2]

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1. Nishina Center for Accelerator Based Science, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198 (Japan)
2. SHI Accelerator Service Ltd., Ohsaki 1-17-6, Shinagawa Tokyo 141-0032 (Japan)

The next generation heavy ion accelerator facility, such as the RIKEN radio isotope (RI) beam factory, requires an intense beam of high charged heavy ions. In the past decade, performance of the electron cyclotron resonance (ECR) ion sources has been dramatically improved with increasing the magnetic field and rf frequency to enhance the density and confinement time of plasma. Furthermore, the effects of the key parameters (magnetic field configuration, gas pressure, etc.) on the ECR plasma have been revealed. Such basic studies give us how to optimize the ion source structure. Based on these studies and modern superconducting (SC) technology, we successfully constructed the new 28 GHz SC-ECRIS, which has a flexible magnetic field configuration to enlarge the ECR zone and to optimize the field gradient at ECR point. Using it, we investigated the effect of ECR zone size, magnetic field configuration, and biased disk on the beam intensity of the highly charged heavy ions with 18 GHz microwaves. In this article, we present the structure of the ion source and first experimental results with 18 GHz microwave in detail.

• OSTI ID: 22053671
• 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
CONFINEMENT TIME
ECR ION SOURCES
ELECTRON CYCLOTRON-RESONANCE
GHZ RANGE
HEAVY ION ACCELERATORS
HEAVY IONS
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
MICROWAVE RADIATION
PLASMA
PLASMA CONFINEMENT
PLASMA DENSITY
SUPERCONDUCTING COILS
SUPERCONDUCTING MAGNETS