H− ion sources for CERN's Linac4
H− ion sources for CERN's Linac4
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CERN Linac4 的 H− 离子源
DOI：
10.1063/1.4792798
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发表时间：
2013
影响因子：
15
通讯作者：
D. Steyaert
中科院分区：
文献类型：
--
作者：
J. Lettry;D. Aguglia;Y. Coutron;E. Chaudet;A. Dallocchio;J. Flores;J. Hansen;E. Mahner;S. Mathot;S. Mattei;Ø. Midttun;P. Moyret;D. Nisbet;M. O’Neil;M. Paoluzzi;C. Pasquino;H. Pereira;J. S. Arias;C. Schmitzer;R. Scrivens;D. Steyaert
Linac 4离子源的规格设定为：H−离子脉冲持续时间为0.5 ms，强度为80 mA，能量为45 keV，归一化发射度为0.25 mmmrad RMS，重复频率为2 Hz。2010年，在基于从等离子体体积产生H−的原型的调试期间，观察到这种类型的离子源固有的强大的共提取电子束可以在达到标称参数之前破坏其电子束转储。然而，相同的源能够提供与小部分H2+和H3+分子离子混合的80 mA的质子。Linac 4的射频四极加速器、束流斩波器和H-束流诊断器计划于2012年投入使用，其在地下建筑的最后安装将于2013年开始。因此，2010年启动了一项应急计划，并于2011年进行了审查，旨在保持最初的Linac 4时间表，并提供以下成果：设计和生产一个体积离子源原型。
The specifications set to the Linac4 ion source are: H− ion pulses of 0.5 ms duration, 80 mA intensity and 45 keV energy within a normalized emittance of 0.25 mmmrad RMS at a repetition rate of 2 Hz. In 2010, during the commissioning of a prototype based on H− production from the plasma volume, it was observed that the powerful co-extracted electron beam inherent to this type of ion source could destroy its electron beam dump well before reaching nominal parameters. However, the same source was able to provide 80 mA of protons mixed with a small fraction of H2+ and H3+ molecular ions. The commissioning of the radio frequency quadrupole accelerator (RFQ), beam chopper and H− beam diagnostics of the Linac4 are scheduled for 2012 and its final installation in the underground building is to start in 2013. Therefore, a crash program was launched in 2010 and reviewed in 2011 aiming at keeping the original Linac4 schedule with the following deliverables: Design and production of a volume ion source prototype sui...