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KEKCB electron cyclotron resonance charge breeder at TRIAC

Imai, Nobuaki*; Jeong, S.-C.*; Oyaizu, Mitsuhiro*; Arai, Shigeaki*; Fuchi, Yoshihide*; Hirayama, Yoshikazu*; Ishiyama, Hironobu*; Miyatake, Hiroari; Tanaka, Masahiko*; Okada, Masayuki*; Watanabe, Yutaka*; Ichikawa, Shinichi; Kabumoto, Hiroshi; Osa, Akihiko; Otokawa, Yoshinori; Sato, Tetsuya

KEKCB is an 18 GHz Electron Cyclotron Resonance (ECR) ion source and is a charge breeder device for converting mass-separated 1$$^+$$ radioactive ions to multi-ionized ones by utilizing an axial injection technique to the ECR plasma. It is a part of the Tokai Radioactive Ion Accelerator Complex (TRIAC) facility. Based on the developments so far, converting efficiencies for metal elements, such as barium and indium, and for gaseous elements, such as krypton and xenon, are improved to be 7 $$%$$ and 2 $$%$$, respectively. And it is confirmed that the efficiency is nearly the constant for short-lived (t$$_{1/2}$$ $$ge$$ 1 sec) isotopes. Background ions mixed in the output beams are supressed to be 600 pps from 10$$^8$$ pps by applying all aluminum electrodes and high pressure pure-water cleanings.

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Category:Instruments & Instrumentation

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