在RAON开发和调试预聚束系统

IF 1.4 3区 物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION
Donghyun Kwak , Seok-Ho Moon , Kyoungho Tshoo , Gidong Kim , Jang Won Kwon , Min Jae Kim , Kyounghun Yoo , Eunhun Im , Sangjin Lee , Hyung Jin Kim , Hyungjoo Woo , Junyeong Jeong , Cheolmin Ham , Moses Chung
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引用次数: 0

摘要

联机实验用稀有同位素加速器(RAON)的低能实验系统由韩国广接受反冲光谱仪(KoBRA)和核数据生产系统(NDPS)组成。在飞行时间(TOF)实验中,光束重复率的控制是至关重要的,因为过于频繁的主光束束会导致二次光束束的重叠,从而导致二次光束粒子的TOF测量的不确定性。本研究介绍了RAON预聚束系统的设计、制造和调试结果,以管理光束重复率。开发的预聚束系统结合了一个快速斩波器和一个双间隙聚束器(DGB)。快速斩波器利用现有的慢斩波电极,通过调整它们来产生具有可控重复率的脉冲光束。同时,DGB在射频四极杆(RFQ)入口将脉冲长度减小到小于一个射频四极杆(RFQ)周期,从而最大限度地减少RFQ加速过程中卫星束的形成。在波束调试之前,使用SIMION代码进行仿真验证了预聚束系统的性能。此外,我们还开发了射频电压提升电路,为快速斩波器和DGB提供高压射频。在设计和开发阶段之后,我们对Ar8+离子束进行了光束调试,在RAON上首次成功地演示了单束的产生,证实了预束系统的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development and commissioning of the pre-bunching system at RAON
The low-energy experimental systems at the Rare isotope Accelerator complex for ON-line experiments (RAON) consist of the Korea Broad Acceptance Recoil spectrometer and Apparatus (KoBRA) and the Nuclear Data Production System (NDPS). Controlling the beam repetition rate is essential for Time-of-Flight (TOF) experiments because too frequent primary beam bunches can cause overlapping of secondary beam bunches, leading to uncertainty in the TOF measurements of secondary beam particles. This study presents the design, fabrication, and commissioning results of a pre-bunching system at RAON to manage the beam repetition rate. The developed pre-bunching system combines a fast chopper with a Double Gap Buncher (DGB). The fast chopper utilizes the existing slow chopper electrodes by adapting them to generate pulsed beams with controlled repetition rates. Meanwhile, the DGB reduces the pulse length to less than one Radio Frequency Quadrupole (RFQ) cycle at the RFQ entrance, thereby minimizing the formation of satellite bunches during RFQ acceleration. Simulations using the SIMION code validated the pre-bunching system’s performance prior to beam commissioning. Additionally, we have developed RF voltage-boosting circuits to supply high-voltage RF to both the fast chopper and the DGB. Following the design and development phase, we performed beam commissioning with Ar8+ ion beams, which successfully demonstrated the generation of single bunches for the first time at RAON, confirming the performance of the pre-bunching system.
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来源期刊
CiteScore
3.20
自引率
21.40%
发文量
787
审稿时长
1 months
期刊介绍: Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.
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