Separated function RFQ beam dynamics design and commissioning

Separated function RFQ beam dynamics design and commissioning
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独立功能 RFQ 梁动力学设计和调试

DOI:
10.1016/j.nima.2011.03.035
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发表时间:
2011-06
期刊:
Nuclear Instruments & Methods In Physics Research
影响因子:
--
通讯作者:
M.L.Kang,Y.R.Lu,J.E.Chen,K.Zhu,Z.Wang,X.Q.Yan
M.L.Kang,Y.R.Lu,J.E.Chen,K.Zhu,Z.Wang,X.Q.Yan
中科院分区:
其他
文献类型:
--
作者:
M.L.Kang,Y.R.Lu,J.E.Chen,K.Zhu,Z.Wang,X.Q.Yan

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分离功能射频四极(SFRFQ)加速器是一种新型结构,它将振膜加载到四极电极上形成加速间隙,而未调制的射频四极电场提供横向聚焦。与常规RFQ相比,SFRFQ对重离子具有更高的低频加速效率。为了减小反向电场,避免射频火花,采用了非对称电极和膜片的设计。经过模拟和射频设计,搭建了一个由14个βλ/2单元组成的全尺寸超临界RFQ原型腔,作为北京大学整体劈裂环RFQ的后加速器。为了验证其可行性,进行了梁的调试。实验结果与SFRFQCODEV1.0[Z.Wang,J.E.Chen,Y.R.Lu,et al.,Nucl.]的模拟结果吻合较好。实例。还有梅斯。A,572,(2007)596]。
Separated Function Radio Frequency Quadrupole (SFRFQ) accelerator is a new structure where diaphragms are loaded onto the quadrupole electrodes to form accelerating gaps, while the unmodulated RF quadrupole electric field provides transverse focusing. SFRFQ promises a higher accelerating efficiency than the conventional RFQ for heavy ions at low frequencies. In order to reduce reverse field and avoid RF sparking, an asymmetrical electrode and diaphragms designs were adopted. After simulation and RF design, a full scale SFRFQ prototype cavity with 14βλ/2 cells has been constructed as a post-accelerator of the Peking University Integral Split Ring (ISR) RFQ. Beam commissioning was carried out to verify its feasibility. It accelerates O+beam from 64 to 103 keV/uwith a beam current exceeding 0.53 mA and the experimental results agree well with the simulation predictions by SFRFQCODEV1.0 [Z. Wang, J.E. Chen, Y.R. Lu, et al., Nucl. Instr. and Meth. A, 572, (2007) 596].
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