Design of a CW linac for the Compact Intense Fast NEutron Facility
Design of a CW linac for the Compact Intense Fast NEutron Facility
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紧凑型强快中子设施连续直线加速器的设计
DOI：
10.1016/j.nima.2019.03.086
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发表时间：
2019-06-21
影响因子：
1.4
通讯作者：
Liu, S.
中科院分区：
文献类型：
--
作者：
Li, H. P.;Wang, Z.;Liu, S.
紧凑型强流快中子装置（CIFNEF）将有广泛的应用，包括研究丰中子核的奇异结构、核裂变数据和星星中子场的模拟。为满足产生高强度快中子和低环境本底正向中子的要求，CIFNEF直线加速器应具备将连续波氘（D+）、氢（H-2（+））和锂（Li-7（3+））束流加速到2.5MeV/u的能力，最大束流电流分别为10 mA、5 mA和10 uA。基于上述要求，我们提出了一种新型的紧凑型直线加速器使用的组合的双金属和DTL结构。模拟结果表明，三种离子均能加速到最终能量，传输效率在99%以上，束流质量好，发射度增长小。此外，我们进行了误差敏感性分析和组合误差研究，以评估所获得的设计的误差容限。
The proposed Compact Intense Fast NEutron Facility (CIFNEF) will have a wide range of applications, including the investigation of the exotic structure of neutron-rich nuclei, data for the nuclear fission, and the simulation of the neutron field in a star. To satisfy aims of producing high-intensity fast neutrons and forward neutrons with very low environmental background, the CIFNEF linac should have the capacity of accelerating continuous wave (CW) deuteron (D+), hydrogen (H-2(+)) and lithium (Li-7(3+)) beams to 2.5 MeV/u with maximum beam currents of 10 mA, 5 mA and 10 uA, respectively. Based on the above requirements, we proposed a novel compact linac using a combination of RFQ and DTL structures. The dynamics of RFQ and DTL are completed to meet all requirements and start-to-end simulation results show that the three ion species can be accelerated to the final energy with transmission efficiency above 99% as well as good beam quality with lower emittance growth. In addition, we performed error sensitivity analysis and combined error study to evaluate the error tolerance limits of the obtained design.