NDLI: Design of a CW BISOL RFQ for Three Kinds of High-Charge-State Ions Simultaneous Acceleration

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Design of a CW BISOL RFQ for Three Kinds of High-Charge-State Ions Simultaneous Acceleration

Content Provider	MDPI
Author	Han, Meiyun Lu, Yuanrong Wang, Zhi Peng, Zhaohua Liu, Shuo Wei, Tianhao Xia, Ying
Copyright Year	2022
Abstract	Based on the latest design requirements proposed by the Beijing On-Line Isotope Separation (BISOL) project, a new ${Sn}^{22 +}$ -based, 81.25 MHz CW radio frequency quadrupole (RFQ) with external bunching has been designed. This RFQ can accelerate ${Sn}^{22 +}$ to 0.5 MeV/u with an output longitudinal-normalized rms emittance of 0.20 keV/u·ns over a length of 5.6 m. The tolerance and error analysis results indicate that this RFQ can handle a wide range of non-ideal beams while maintaining relatively lower longitudinal emittance growth and higher transmission efficiency. To maintain the beam intensity, the RFQ will simultaneously accelerate three kinds of high-charge-state mixed ions ( $^{132} {Sn}^{21 +}$ , $^{132} {Sn}^{22 +}$ and $^{132} {Sn}^{23 +}$ ), the simulation results given by Impact-T show that the RFQ can achieve high transmission of the mixed beam. Compared with the previous ${Sn}^{21 +}$ -based internal bunching RFQ scheme, this RFQ has a shorter length and smaller output emittance, which is beneficial to the designs of subsequent Medium-energy Beam Transport (MEBT) and Drift Tube Linac (DTL). In electromagnetic design, a four-vane structure with 48 tuners and 16 $π$ -mode stabilizers (PSLs) were chosen. The results of the multi-physics analysis show that the maximum temperature rise and the maximum deformation of the cavity are 13.6 K and 40.3 µm, respectively. The results simulated with CST Microwave Studio (CST) and HFSS software were consistent.
Starting Page	7761
e-ISSN	20763417
DOI	10.3390/app12157761
Journal	Applied Sciences
Issue Number	15
Volume Number	12
Language	English
Publisher	MDPI
Publisher Date	2022-08-02
Access Restriction	Open
Subject Keyword	Applied Sciences Nuclear Energy and Engineering Cw Rfq Beam Dynamics High-charge-state Mixed Beams Electromagnetic Design
Content Type	Text
Resource Type	Article

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