Author: He, Y.
Paper Title Page
MOPTS057 SSPA upgrade plan design for CiADS 990
 
  • Q. Chen, Z. Gao, Y. He, G. Huang, R. Huang, T.C. Jiang, S.H. Liu, L.P. Sun, X.W. Wang, Z.J. Wang, W.M. Yue
    IMP/CAS, Lanzhou, People’s Republic of China
 
  Funding: Supported by the National natural science foundation of China (Grand No. 11525523 and 91426303)
For ADS application, both research and commercial facilities requires extremely large amount of RF power to drive several mega watts beam power, so proper RF power upgrade plan can reduce the budget per phase and increase the valuable experience in engineering. CiADS (China initiative Accelerator Drive System) proposes to employ SSPA (Solid State Power Amplifier) as RF power source for flexible configuring and upgrading in the future. In this paper, from an engineering point of view, it is acceptable if proper matching beam current was selected for adopting fixed-coupling input coupler while only sacrificed some RF power during the upgrade plan. SSPA upgrade plan start with the stablility requirement to determine bandwidth, then combined with other RF power requirements to select output level, finally, checking how much the surplus of selected level SSPA for detuning control. The calculation and evaluation results for a §I{545}{MeV} physical design lattice illustrate that some resonance cavities had very limited surplus RF power left for detuning control that provided necessary optimization direction and guidelines for both physical design and SSPA arrangement.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS057  
About • paper received ※ 30 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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MOPTS059 The Status of CiADS Superconducting LINAC 994
 
  • Z.J. Wang, Y. He, G. Huang, S.H. Liu, T. Tan, Y.Q. Wan, F.F. Wang, W.M. Yue
    IMP/CAS, Lanzhou, People’s Republic of China
 
  CiADS (China initiative Accelerator Driven System) approved by Chinese government at 2016 aims to build the first ADS experimental facility to demonstrate the nuclear waste transmutation. The CiADS driving linac can accelerate 5 mA proton beam to 500 MeV at the beam power up to 2.5 MW with the state-of-the-art accelerator technologies. The challenging programs include beam loss control-oriented physics design, high performance CW operated superconducting cavities, SRF cryomod-ules, and highly efficient RF amplifier system. As the driving linac of the ADS system, the RAMI characters will serve as the design philosophy to guide the physics design and the choice of technical routes. The physics design and key technologies of the high-power machine are descried in the paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS059  
About • paper received ※ 14 May 2019       paper accepted ※ 24 May 2019       issue date ※ 21 June 2019  
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MOPTS072 RF DESIGN OF AN 81.25 MHz BENT-VANE TYPE RFQ 1015
SUSPFO078   use link to see paper's listing under its alternate paper code  
 
  • L. Yang, T. He, Y. He, L. Lu, C.C. Xing, L. Yang
    IMP/CAS, Lanzhou, People’s Republic of China
  • A.H. Li
    IHEP, Beijing, People’s Republic of China
 
  The bent-vane type RFQ is proposed at IMP, Chinese Academy of Sciences, which can downsize cross section and has the simple cooling system in low frequency field. The vanes of the four-vane type RFQ are bent to form the new RFQ structure. In order to research its RF properties, the prototype cavity of an 81.25 MHZ bent-vane type RFQ is designed. This paper presents the preliminary RF design of the prototype cavity.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS072  
About • paper received ※ 17 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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MOPTS075 Design and Experiment of a Window-Type CW Deuteron RFQ 1021
 
  • K. Zhu, M.J. Easton, P.P. Gan, S.L. Gao, H.P. Li, S. Liu, Y.R. Lu, Q.Y. Tan, L. Tao, Z. Wang
    PKU, Beijing, People’s Republic of China
  • W.P. Dou, Y. He, C. Wang, Q. Wu, H.W. Zhao
    IMP/CAS, Lanzhou, People’s Republic of China
 
  A deutron CW RFQ was designed and fabricated in Peking University. It will accelerate 50mA CW deutron beam from 50keV to 1MeV at 162.5MHz. The novel structure of four-vane with window was used to seperate the dipole mode from the working mode. The field tuning of this RFQ was different from conventional four vane RFQ because that the four quadrants of RFQ cavity were coupled. The discipline of field tuning was studied by simulation and experiment. The beam dynamics of the RFQ was designed by equipartation and matching method, limit current effect was considered at the same time. The final design result of the RFQ was: voltage between electrodes was 60kV, transport efficiency of RFQ is 98%, field unflatness is less than 2% after tuning, the deformation of RFQcavity is less than 80um. Only 47 hours was spent to increase CW power of cavity from 0 to 55kW in high power test and The RFQ can working stable at the design voltage. The preliminary H2+ beam exeperiment has been done and 1.78mA CW beam was obtained at exit of RFQ. This paper will introduce the detail of design and experiment of the RFQ.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS075  
About • paper received ※ 22 May 2019       paper accepted ※ 24 May 2019       issue date ※ 21 June 2019  
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TUYPLS2
Development of Accelerator Driven Advanced Nuclear Energy and Nuclear Fuel Recycling  
 
  • H.S. Xu, L. Gu, Y. He, Z. Qin, Z.G. Wang, Z.J. Wang, L. Yang, J.H. Zhang, X. Zhang
    IMP/CAS, Lanzhou, People’s Republic of China
  • W.-L. Zhan
    CAS, Beijing, People’s Republic of China
 
  The proposed Accelerator Driven Advanced Nuclear Energy System (ADANES) is a new closed nuclear energy cycle system, aimed at improving the utilization rate of nuclear fuels, enhancing nuclear safety, reducing the nuclear proliferation, and at becoming a sustainable and low-carbon energy supply for thousands of years. The ADANES system consists of fuel burner similar to the Accelerator Driven System (ADS), used nuclear fuel processing and recycle system. Recently, several prototypes and developments for key technologies have been made, such as 25 MeV proton superconducting linac, granular flow spallation target, a new-design reactor, key process of used nuclear fuel, and others. This talk will present ADANES development and status of key technology R&D.  
slides icon Slides TUYPLS2 [15.580 MB]  
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WEPRB032 Superconducting Elliptical Cavities Developed in IMP for the CiADS 2883
 
  • Y.L. Huang, Y. He, R. Huang, T.C. Jiang, L.B. Liu, S.H. Liu, T. Tan, R.X. Wang, Z.J. Wang, S.H. Zhang, S.X. Zhang
    IMP/CAS, Lanzhou, People’s Republic of China
 
  Multicell superconducting radio frequency (SRF) ellip-tical cavities are proposed for efficient acceleration of proton beam in the Chinese initiative Accelerator Driven Subcritical System (CiADS). Two families of such cavities will be used in the driver SRF Linac, the first family corresponding to βopt=0.62 cavities that will be used to accelerate the H+ beam from 175 MeV to 377 MeV and the second family corresponding to βopt=0.82 cavities that will accelerate the H+ beam from 377 MeV to 500 MeV, with the possibility to upgrade to 1 GeV and higher. The electromagnetic optimization of the cavities with the HOM, wakefield and multipacting analysis will be dis-cussed in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPRB032  
About • paper received ※ 14 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019  
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