Design of magnet and control of the beam emittance for Penning H- ion source

The design requirement and principle of the deflection magnet for Magnetron and Penning H- ion source are discussed.It is proved that there exists a maximum emittance for the beam that may be transformed by the magnet into a state with equal Twiss parameters of αr=αy and βr =βy,which is the requisite condition to get a minimum emittance at the entrance of RFQ after transporting by a LEBT with solenoids.For this maximum emittance,the corresponding magnetic field gradient index is 1.

作 者： OUYANG Hua-Fu ZHANG Hua-Shun   作者單位： Institute of High Energy Physics,CAS,Beijing 100049,China  刊 名： 中國物理C(英文版)  ISTIC 英文刊名： CHINESE PHYSICS　C  年，卷(期)： 2008 32(8)  分類號(hào)： O4  關(guān)鍵詞： H- ion source   Magnetron ion source   Penning ion source   magnetic field gradient index  

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