Magnetic Field Configuration Effect and New ECRISs for RIKEN RIBF Project

T.Nakagawa<SUP>1</SUP>; M.Kidera<SUP>1</SUP>; Y.Higurasi<SUP>1</SUP>; J.Ohnishi<SUP>1</SUP>; T.Kageyama<SUP>1</SUP>; T.Aihara<SUP>2</SUP>; A.Goto<SUP>1</SUP>; Y.Yano<SUP>1</SUP>

Chinese Physics C> 2007, Vol. 31> Issue(S1) : 133-136

Magnetic Field Configuration Effect and New ECRISs for RIKEN RIBF Project

Nishina Center for Accelerator Based Science, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan2 SAS Ltd, Ohsaki 1-17-6, Sinagawa-ku, Tokyo, 141-0032, Japan

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Abstract：
We measured the main plasma parameters (density of electron, temperature of electron and ion confinement time) and beam intensity of various heavy ions as a function of B_min. The B_min strongly affects the field gradient at the resonance zone, consequently the plasma parameters and beam intensity are changed. Based on these experimental results, we started to construct new 18GHz ECRIS and make a detailed design of the 28GHz SC-ECRIS for RIKEN RI beam factory project.

References

[1]

. Yano Y. Proc. 17th International Conference on Cyclotrons and Their Applications (2004, Tokyo, Japan) p.1692. Nakagawa T et al. Jpn. J. of Appl. Phys., 1993, 32: L13353. Nakagawa T et al. Nucl. Instrum. Method, 2004, B226:3924. Kurita T et al. Nucl. Instrum. Method, 2002, B192: 4295. Arai H et al. Nucl. Instrum. Method, 2002, A491: 96. Imanaka M et al. Nucl. Instrum. Method, 2005, B237: 6477. Nakagawa T et al. Rev. Sci. Instrum., 2002, 73: 5138. Leitner D et al. Rev. Sci. Instrum., 2006, 77: 03A3029. Lyines C et al. Rev. Sci. Instrum., 2004, 75: 138910. ZHAO H W et al. HEP NP, 2007, 31(Suppl.Ⅰ): 8(in Chinese)(赵卫红等.高能物理与核物理,2007,31(增刊Ⅰ):8)11. Ohnishi J et al. HEP NP, 2007, 31(Suppl.Ⅰ): 37(in Chinese)(Ohnishi J 等.高能物理与核物理,2007,31(增刊Ⅰ):37)12. Higurashi Y et al. Rev. Sci. Instrum., 2004, 75: 1467

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T.Nakagawa¹, M.Kidera¹, Y.Higurasi¹, J.Ohnishi¹, T.Kageyama¹, T.Aihara², A.Goto¹ and Y.Yano¹. Magnetic Field Configuration Effect and New ECRISs for RIKEN RIBF Project[J]. Chinese Physics C, 2007, 31(S1): 133-136.

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Received: 2007-05-30
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Magnetic Field Configuration Effect and New ECRISs for RIKEN RIBF Project

Nishina Center for Accelerator Based Science, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan2 SAS Ltd, Ohsaki 1-17-6, Sinagawa-ku, Tokyo, 141-0032, Japan

Received Date: 2007-05-30
Accepted Date: 1900-01-01
Available Online: 2007-01-03

Abstract: We measured the main plasma parameters (density of electron, temperature of electron and ion confinement time) and beam intensity of various heavy ions as a function of B_min. The B_min strongly affects the field gradient at the resonance zone, consequently the plasma parameters and beam intensity are changed. Based on these experimental results, we started to construct new 18GHz ECRIS and make a detailed design of the 28GHz SC-ECRIS for RIKEN RI beam factory project.