【摘要】 文章介绍西德DESY研究所750keV负氢离子预注入器的调整结果。通过提高弧流,磁控管型H~-离子源可以引出18keV,60—80mA的H~-脉冲离子流。发现外部磁场可以在螺旋管内部感生一个方向大体相同的磁场。在低能输运段,离子束空间电荷中和所需的时间约100μs。在离子源引出束流约65mA时,经两对螺旋管聚焦和RFQ加速后可以获得能量为750±8.8keV,聚团半宽度约0.8ns,发射度约3mm·mrad,束流为52mA的脉冲H~-流;其中33mA以上的束流处于1mm·mrad以内。更多还原

【Abstract】 The main results measured on the H~- preinjector used in DESY are presented.18keV, 60--80mA of pulsed H~- current can be extracted from the magnetron H~-source. It is discovered that an outside magnetic field can induce a magneticfield inside of a solenoid magnet. The time for space charge neutralizationalong the LEBT is～100 μs. After being focused by two solenoids and acceleratedby RFQ, pulsed H~- beam of 750±8.8 keV in energy, 52 mA in current, 0.8 ns inbunch width, and 3 mm.mrad in emittance can be obtained, when the extractedbeam current from the source is～65mA. More than 33 mA of the acceleratedcurrent is within 1 mm.mrad of emittance.更多还原