Axial magnetic field effect for the J-PARC RF-driven ion source

Yamazaki, Saishun

A cesium (Cs) seeded RF-driven H $^{-}$ ion source using an internal-antenna is under development for the Japan Proton Accelerator Research Complex (J-PARC). The J-PARC second stage requirements are an H $^{-}$ ion beam of 60 mA within normalized emittances of 1.5 mmmrad both horizontally and vertically, and a flat top beam duty factor of 1.25% (500 s 25 Hz). An H $^{-}$ ion beam current of 77.5 mA with a flat top duty factor of 2% (800 s 25 Hz), whose approximately 90% (corresponding to approximately 70 mA) of each emittance is within 1.5 mmmrad, is successfully extracted from it. The experimental results of axial magnetic field (AMF) optimization with an axial magnetic field correction (AMFC) coil, which significantly enhances the H $^{-}$ ion beam current by 10% typically, are presented in this meeting.

Language	:	Japanese
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Meeting title	:	平成24年度負イオン研究会「負イオン生成および負イオンビーム加速の新展開とその応用」
Held date	:	2012/12
Location (city)	:	土岐
Location (country)	:	日本
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Keywords	:	no keyword
Research Facility	:	J-PARC加速器
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Registration No. : BB20122716
JAEA Abstracts No. :
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