Author: Liu, X.
Paper Title Page
TUPAB044 Preliminary Study of the on-Axis Swap-Out Injection Scheme for the Southern Advanced Photon Source 1447
 
  • Y. Han, X.H. Lu, Y. Zhao
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • L. Huang, Y. Jiao, X. Liu, S. Wang
    IHEP, Beijing, People’s Republic of China
  
  The South­ern Ad­vanced Pho­ton Source (SAPS) is a pro­ject under de­sign, which aims at con­struct­ing a 4th gen­er­a­tion stor­age ring with emit­tance below 100 pm.​rad at the elec­tron beam en­ergy of around 3.5 GeV. The ex­tremely low emit­tance will re­sult in a very small dy­namic aper­ture for the stor­age ring which makes it dif­fi­cult to use the con­ven­tional off-axis ac­cu­mu­la­tion in­jec­tion. In this case, it is prob­a­bly nec­es­sary to con­sider the trans­verse on-axis in­jec­tion or the lon­gi­tu­di­nal in­jec­tion. In this paper, the trans­verse on-axis swap-out in­jec­tion scheme for the SAPS stor­age ring is pre­sented. The pre­lim­i­nary pa­ra­me­ters of the sep­tum mag­nets and fast kick­ers are care­fully eval­u­ated.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB044  
About • paper received ※ 17 May 2021       paper accepted ※ 10 June 2021       issue date ※ 27 August 2021  
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TUPAB045 The Low Energy Injector Design for the Southern Advanced Photon Source 1450
 
  • Y. Han
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • Y. Jiao, B. Li, X. Liu, S. Wang
    IHEP, Beijing, People’s Republic of China
  
  The South­ern Ad­vanced Pho­ton Source (SAPS) is a pro­ject under de­sign, which aims at con­struct­ing a 4th gen­er­a­tion stor­age ring with emit­tance below 100 pm.​rad at the elec­tron beam en­ergy of around 3.5 GeV. At pre­sent, two in­jec­tor op­tions are under con­sid­er­a­tion. One is a full en­ergy booster plus a low en­ergy in­jec­tor, and an­other is a full en­ergy linac in­jec­tor. In this paper, a pre­lim­i­nary de­sign of the low en­ergy in­jec­tor is pre­sented, which con­sists of an DC thermionic elec­tron gun, a bunch­ing sec­tion and an ac­cel­er­at­ing sec­tion. The beam en­ergy at the end of the in­jec­tor is about 150 MeV.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB045  
About • paper received ※ 17 May 2021       paper accepted ※ 09 June 2021       issue date ※ 18 August 2021  
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TUPAB047 Bunch Compressor Design in the Full Energy Linac Injector for the Southern Advanced Photon Source 1458
 
  • B. Li
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • Y. Jiao, X. Liu, S. Wang
    IHEP, Beijing, People’s Republic of China
  
  A mid-en­ergy fourth-gen­er­a­tion stor­age ring light source named the South­ern Ad­vanced Pho­ton Source (SAPS), has been con­sid­ered to be built neigh­bor­ing the China Spal­la­tion Neu­tron Source (CSNS). A full en­ergy linac has been pro­posed as an in­jec­tor to the stor­age ring, with the ca­pa­bil­ity to gen­er­ate high bright­ness elec­tron beams to feed a Free Elec­tron Laser (FEL) at a later stage. To achieve the high peak cur­rent in FELs, space charge, RF struc­ture wake­field, co­her­ent syn­chro­tron ra­di­a­tion (CSR), RF cur­va­ture, and the sec­ond-or­der mo­men­tum com­paction fac­tor should be care­fully con­sid­ered and op­ti­mized dur­ing the bunch com­pres­sion processes. In this paper, physic de­sign and sim­u­la­tion re­sults of the bunch com­pres­sors are de­scribed.  
poster icon Poster TUPAB047 [1.918 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB047  
About • paper received ※ 15 May 2021       paper accepted ※ 09 June 2021       issue date ※ 28 August 2021  
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THPAB104 Magnetic Error Effects of the Storage Ring for the Southern Advanced Photon Source 3980
 
  • J. Chen, Y. Jiao, X. Liu, S. Wang
    IHEP, Beijing, People’s Republic of China
  • Y. Zhao
    IHEP CSNS, Guangdong Province, People’s Republic of China
  
  There are var­i­ous mag­netic er­rors in the ac­tual ac­cel­er­a­tor, which will sig­nif­i­cantly af­fect the beam qual­ity and ma­chine per­for­mance. The dif­frac­tion-lim­ited stor­age ring (DLSR) of South­ern Ad­vanced Pho­ton Source (SAPS) will use a large num­ber of ul­tra-high gra­di­ent quadrupoles and sex­tupoles, which, in turn, leads to the tight tol­er­ance of beam pa­ra­me­ters to mag­netic er­rors. Based on a pre­lim­i­nary de­signed stor­age ring lat­tice of the SAPS, the in­flu­ence of var­i­ous mag­netic er­rors on lat­tice pa­ra­me­ters has been eval­u­ated.  
poster icon Poster THPAB104 [0.588 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB104  
About • paper received ※ 17 May 2021       paper accepted ※ 23 June 2021       issue date ※ 18 August 2021  
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