The longitudinal "trapping" phenomenon in the simultaneous acceleration of intense h+ and h- in an rfq
文献类型：期刊论文
| 作者 | Xing, QZ; Fu, SN; Lin, YZ; Fang, SX |
| 刊名 | Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment
 |
| 出版日期 | 2005-02-11 |
| 卷号 | 538期号:1-3页码:143-153 |
| 关键词 | Computer simulation Simultaneous acceleration Rfq Parmteq Pic method |
| ISSN号 | 0168-9002 |
| DOI | 10.1016/j.nima.2004.09.011 |
| 通讯作者 | Xing, qz(xqz98@mails.tsinghua.edu.cn) |
| 英文摘要 | The phenomenon of longitudinal "trapping" in the simultaneous acceleration of intense h+ and h- beams in an rfq accelerator is described in this paper. a new code named parmteqvc is compiled based on an old version of t-code parmteq for the computer simulation. in this code, the 2d pic method is applied to calculate the space charge forces. multi-bunch effects are also taken into account. in our simulation the rfq structure parameters which were designed only for single beam (h+ or h-) acceleration are adopted. the simulation result shows that more ions near the ends of buckets are "trapped" into the bunches with opposite charge state. these ions leave their own buckets gradually and become lost in either longitudinal or transverse direction, leading to a descent of the total transmission rate. further studies reveal that the depth of longitudinal potential well decreases in the case of the simultaneous acceleration, which is attributed to the weaker bunching forces because of the longitudinal space charge interaction between the positive and negative ion bunches. it seems that a new rfq structure should be specially designed for the simultaneous acceleration in order to neutralize the transverse space charge effect and increase the beam transmission rate at the same time. the design ideas are then presented. (c) 2004 elsevier b.v. all rights reserved. |
| WOS研究方向 | Instruments & Instrumentation ; Nuclear Science & Technology ; Physics ; Spectroscopy |
| WOS类目 | Instruments & Instrumentation ; Nuclear Science & Technology ; Physics, Particles & Fields ; Spectroscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000227080600012 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2175800 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Xing, QZ |
| 作者单位 | 1.Tsing Hua Univ, Accelerator Lab, Dept Engn Phys, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xing, QZ,Fu, SN,Lin, YZ,et al. The longitudinal "trapping" phenomenon in the simultaneous acceleration of intense h+ and h- in an rfq[J]. Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment,2005,538(1-3):143-153. |
| APA | Xing, QZ,Fu, SN,Lin, YZ,&Fang, SX.(2005).The longitudinal "trapping" phenomenon in the simultaneous acceleration of intense h+ and h- in an rfq.Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment,538(1-3),143-153. |
| MLA | Xing, QZ,et al."The longitudinal "trapping" phenomenon in the simultaneous acceleration of intense h+ and h- in an rfq".Nuclear instruments & methods in physics research section a-accelerators spectrometers detectors and associated equipment 538.1-3(2005):143-153. |
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