Study on the H− stripping injection for the Rapid Cycling Synchrotron of the China Spallation Neutron Source

Huang, Ming-Yang; Shou, Xu; Chen, Jiaxin; Li, Yue; Wang, Sheng

doi:10.1007/s41605-022-00326-4

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…In ref. [29], the chosen and optimization analysis for the CSNS stripping foil have been described in detail. A double-layer HBC foil is instead of a single-layer DLC foil.…”

Section: Negative Hydrogen Ion Strippingmentioning

confidence: 99%

Performance and painting scheme considerations for the CSNS injection

Huang,

Xu,

Deng

et al. 2024

J. Inst.

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The accelerator complex of China Spallation Neutron Source (CSNS) consists of an 80 MeV H- Linac and a 1.6 GeV proton rapid cycling synchrotron (RCS). The beam injection is one of the most important issues for the CSNS accelerator complex. In this paper, the injection methods have been comprehensively studied, including phase space painting and H- stripping. By using the design scheme of the anti-correlated painting, the beam power has successfully reached 50 kW. However, some difficulties have been found in the higher power beam commissioning. In order to solve these key problems, flexibility in the CSNS design has been exploited to implement the correlated painting by using the rising current curve of the pulse power supply. The effectiveness of the new method has been verified in the simulation and beam commissioning. By using the new method, the beam power on the target has successfully risen to the design value. Secondly, according to the CSNS beam commissioning experience, based on the present design of the injection system, a new idea is proposed to perform both correlated and anti-correlated painting in the CSNS. By adopting an additional vertical shift bump generated by four additional alternating current (AC) magnets in the injection region, the local orbit can be manipulated to meet the requirement of correlated painting. The new method can not only perform the correlated painting, but also optimize the anti-correlated painting. The simulation study shows that the new method works well, and both correlated and anti-correlated painting methods are well performed.

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“…In ref. [29], the chosen and optimization analysis for the CSNS stripping foil have been described in detail. A double-layer HBC foil is instead of a single-layer DLC foil.…”

Section: Negative Hydrogen Ion Strippingmentioning

confidence: 99%

Performance and painting scheme considerations for the CSNS injection

Huang,

Xu,

Deng

et al. 2024

J. Inst.

Self Cite

View full text Add to dashboard Cite

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160 kW beam commissioning for the Rapid Cycling Synchrotron of the China Spallation Neutron Source

Huang,

Liu,

Huang

et al. 2024

J. Inst.

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For the China Spallation Neutron Source (CSNS), the rapid cycling synchrotron (RCS) accumulates and accelerates the injection beam to the design energy of 1.6 GeV and then extracts the high energy beam to the target. In this paper, the 160 kW beam power commissioning for the CSNS RCS has been comprehensively studied, including: increase in the pulse width of the injection beam to optimize the transverse painting, commissioning of the two dual harmonic radio frequency (RF) cavities, optimization of the transverse and momentum collimators, longitudinal dynamic optimization, beam instability suppression, global closed orbit correction, local closed orbit correction, optimization of the RCS occasional large beam loss, optimization of the extraction mode and extraction occasional large beam loss, and so on. In order to meet the requirements of beam power increase and stable operation of the accelerator, the RCS beam losses from different sources are studied and optimized. With the aid of weekly radiation dose measurement, the hot spots of the RCS are studied in depth to explore the causes.

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Study on the H− stripping injection for the Rapid Cycling Synchrotron of the China Spallation Neutron Source

Cited by 2 publications

References 31 publications

Performance and painting scheme considerations for the CSNS injection

Performance and painting scheme considerations for the CSNS injection

160 kW beam commissioning for the Rapid Cycling Synchrotron of the China Spallation Neutron Source

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