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MOPM2P90 |
Status and Challenges of High Intensity Heavy Ion Accelerator Facility (HIAF) in China |
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- J.C. Yang, J.W. Xia, G.Q. Xiao, H.S. Xu, Y.J. Yuan, H.W. Zhao, X.H. Zhou
IMP/CAS, Lanzhou, People's Republic of China
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HIAF is a proposed new accelerator facility in China. The facility is being designed to provide intense primary and radioactive beams for a wide range of research fields. The HIAF facility plan was approved by central government of China in December 2015. The machine studies are now mainly focused on design optimization and key technical R&D.The unique features of the first phase of HIAF are high current pulsed beams from iLinac and high intensity heavy ion beams with ultra-short bunch length from BRing. The cooled rare isotope beams also will be prepared through projectile-fragmentation (PF) method and advanced beam cooling technology. To reach the main goals of the HIAF facility, there are still several technical challenges such as operation with high intensity beams, control of the dynamic vacuum pressure, beam compression for very short pulse beam and the design of Nuclotron-type superconducting magnets. For most of those challenges solutions have been found and prototypes are being built through close international collaborations. The general description, accelerator challenges and present status are given in the presentation.
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Slides MOPM2P90 [9.425 MB]
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| MOPR008 |
Pressure Profiles Calculation for the CSRm and BRing |
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- P. Li, Z. Chai, Z. Dong, X.C. Kang, M. Li, S. Li, W.L. Li, C.L. Luo, R.S. Mao, J. Meng, J.C. Yang, Y.J. Yuan, W.H. Zheng
IMP/CAS, Lanzhou, People's Republic of China
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Funding: National Natural Science Foundation of China (Project No. 11305227)
A new large scale accelerator facility is being designed by Institute of Modern Physics (IMP) Lanzhou, which is named as the High Intensity heavy-ion Accelerator Facility (HIAF). This project consists of ion sources, Linac accelerator, synchrotrons (BRing) and several experimental terminals. During the operation of Bring, the heavy ion beams will be easily lost at the vacuum chamber along the BRing when it is used to accumulate intermediate charge state particles. The vacuum pressure bump due to the ion-induced desorption in turn leads to an increase in beam loss rate. In order to accumulate the beams to higher intensity to fulfill the requirements of physics experiments and for better understanding of the dynamic vacuum pressure caused by the beam loss, a dynamic vacuum pressure simulation program has been developed. Vacuum pressure profiles are calculated and compared with the measured data based on the current synchrotron (CSRm). Then the static vacuum pressure profiles of the BRing and one type of pump which will be used in the BRing are introduced in this paper.
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| MOPR020 |
Space Charge Effects of High Intensity Beams at BRing |
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- J. Li, J.C. Yang
IMP/CAS, Lanzhou, People's Republic of China
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Funding: Work supported by NSFC (Grant No. 11475235)
Space charge effects perform one of the main intensity limitations for low energy synchrotron. Large tune spread and crossing resonance stop-bands can hardly be avoided for intensive heavy ion beam at high intensity. Several subjects like Betatron and structure resonance, and tune spread are discussed. Simulations are carried out for 238U34+ focusing on emittance and intensity change during RF capture at the injection energy at the booster ring of the High Intensity heavy ion Accelerator Facility (HIAF).
lijie@impcas.ac.cn
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Poster MOPR020 [1.157 MB]
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