TY - CONF AU - Chen, Q. AU - Gao, Z. AU - He, Y. AU - Huang, G. AU - Huang, R. AU - Jiang, T.C. AU - Liu, S.H. AU - Sun, L.P. AU - Wang, X.W. AU - Wang, Z.J. AU - Yue, W.M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - SSPA upgrade plan design for CiADS J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - 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. PB - JACoW Publishing CP - Geneva, Switzerland SP - 990 EP - 993 KW - cavity KW - controls KW - coupling KW - klystron KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS057 UR - http://jacow.org/ipac2019/papers/mopts057.pdf ER - TY - CONF AU - Wang, Z.J. AU - He, Y. AU - Huang, G. AU - Liu, S.H. AU - Tan, T. AU - Wan, Y.Q. AU - Wang, F.F. AU - Yue, W.M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The Status of CiADS Superconducting LINAC J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - 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. PB - JACoW Publishing CP - Geneva, Switzerland SP - 994 EP - 997 KW - linac KW - cavity KW - proton KW - cryomodule KW - operation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS059 UR - http://jacow.org/ipac2019/papers/mopts059.pdf ER - TY - CONF AU - Lu, L. AU - He, T. AU - Xing, C.C. AU - Yang, L. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Design and Low Power Test of a Prototype HOM LINAC J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - A 325MHz HOM (higher order mode) type linac was proposed and studied for proton or heavy ion acceleration in medium energy region. The cavity was finished the fabrication already by using copper and aluminum material. We will report results of low power test of the HOM linac in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1001 EP - 1004 KW - DTL KW - HOM KW - cavity KW - linac KW - impedance DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS063 UR - http://jacow.org/ipac2019/papers/mopts063.pdf ER - TY - CONF AU - Yang, L. AU - He, T. AU - He, Y. AU - Li, A.H. AU - Lu, L. AU - Xing, C.C. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - RF DESIGN OF AN 81.25 MHz BENT-VANE TYPE RFQ J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - 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. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1015 EP - 1017 KW - rfq KW - cavity KW - linac KW - ECR KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS072 UR - http://jacow.org/ipac2019/papers/mopts072.pdf ER - TY - CONF AU - Zhu, K. AU - Dou, W.P. AU - Easton, M.J. AU - Gan, P.P. AU - Gao, S.L. AU - He, Y. AU - Li, H.P. AU - Liu, S. AU - Lu, Y.R. AU - Tan, Q.Y. AU - Tao, L. AU - Wang, C. AU - Wang, Z. AU - Wu, Q. AU - Zhao, H.W. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Design and Experiment of a Window-Type CW Deuteron RFQ J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - 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. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1021 EP - 1024 KW - rfq KW - cavity KW - experiment KW - operation KW - Windows DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS075 UR - http://jacow.org/ipac2019/papers/mopts075.pdf ER - TY - CONF AU - He, Y. AU - Gu, L. AU - Qin, Z. AU - Wang, Z.G. AU - Wang, Z.J. AU - Xu, H.S. AU - Yang, L. AU - Zhan, W.-L. AU - Zhang, J.H. AU - Zhang, X. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Development of Accelerator Driven Advanced Nuclear Energy and Nuclear Fuel Recycling J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - 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. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4389 EP - 4393 DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUYPLS2 UR - http://jacow.org/ipac2019/papers/tuypls2.pdf ER - TY - CONF AU - Xu, X.C. AU - Ma, J.Y. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Simulation Analysis of LLRF Feedforward Compensation to Beam Loading for CiADS LINAC J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - A simulation is coded to calculate the beam loading in the cavity of CiADS and the response of the LLRF system. In the pulse operating mode, the fluctuation of amplitude and phase of the cavity field contributed by the transient beam loading is traced. During the simulation the effect of beam current fluctuation, and timing jitter were determined. The deviation margin of relational parameters is lined out to meet the requirement for cavity stability with amplitude 0.1% and phase 0.1°. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2027 EP - 2029 KW - cavity KW - simulation KW - beam-loading KW - controls KW - feedback DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS045 UR - http://jacow.org/ipac2019/papers/tupts045.pdf ER - TY - CONF AU - Pei, Y.J. AU - Cao, L. AU - Chen, Q.S. AU - Feng, G. AU - Fu, Q. AU - He, X.Y. AU - Hong, Y. AU - Hu, T. AU - Huang, G. AU - Jia, D. AU - Lu, P. AU - Lu, S. AU - Shang, L. AU - Shen, L.G. AU - Sun, B.G. AU - Tan, P. AU - Tang, Zh.X. AU - Wang, W. AU - Wang, X.Q. AU - Wei, W. AU - Xiong, Y.Q. AU - Zhang, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Commissioning of a Compact THz Source Based on FEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The layout of the THz source based on FEL was de-scribed in this paper. The THz source was based on a FEL which was composed of a compact 8-14MeV LINAC, undulator, optical resonance, THz wave measurement system and so on. The facility was designed in 2013 and the typical running parameter got in 2017 were as the following: energy is of 12.7MeV, energy spread is of 0.3%, macro-pulse is of 4 μs, pulse length of micro-pulse is of 6ps, emittance is of 24 mm.mrad. After that the ma-chine was commissioning for production THz radiation. In November 2018, the THz wave was test and got THz wave signal, the spectrum was also got. This year, we plan to measure the output power of the THz source. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2030 EP - 2032 KW - linac KW - FEL KW - undulator KW - cavity KW - radiation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS046 UR - http://jacow.org/ipac2019/papers/tupts046.pdf ER - TY - CONF AU - Yang, Y. AU - Guo, Y.H. AU - Lu, L. AU - Shi, L.B. AU - Sun, L.P. AU - Sun, L.T. AU - Xu, X.B. AU - Zhai, Y.H. AU - Zhao, H.W. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Recent Beam Commissioning of LEAF at IMP J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - LEAF (Low Energy intense-highly-charged ion Accelerator Facility) has been successfully commissioned with several beams in CW regime, covering the M/Q from 2 to 7, such as H²⁺, He²⁺, C⁴⁺, O⁴⁺, He⁺, Kr¹³⁺, N²⁺ et al. This paper presents recent beam commissioning results. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2043 EP - 2045 KW - rfq KW - MMI KW - operation KW - acceleration KW - LEBT DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS051 UR - http://jacow.org/ipac2019/papers/tupts051.pdf ER - TY - CONF AU - Huang, Y.L. AU - He, Y. AU - Huang, R. AU - Jiang, T.C. AU - Liu, L.B. AU - Liu, S.H. AU - Tan, T. AU - Wang, R.X. AU - Wang, Z.J. AU - Zhang, S.H. AU - Zhang, S.X. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Superconducting Elliptical Cavities Developed in IMP for the CiADS J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - 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. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2883 EP - 2885 KW - cavity KW - HOM KW - multipactoring KW - operation KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB032 UR - http://jacow.org/ipac2019/papers/weprb032.pdf ER - TY - CONF AU - Ma, J.Y. AU - Huang, G. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Microphonics Simulation and Parameters Design of the SRF Cavities for CiADS J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The CiADS (China initiative Accelerator Driven System) proton Linac is designed to accelerate CW beams of up to 500 MeV and 5mA, which is delivered to the spallation target. Since the beam power will eventually reach 2.5 MW, the beam loss should be restricted, which is sensitive to the SC cavity stability. On CW operating mode, the main perturbation to the cavity is microphonics. This paper will describe a set of tools developed to simulate performance of the cavity and its LLRF control system in order to ensure proper cavity operation under microphonics. The simulation tools describe a relationship between microphonics and the RF parameters. The microphonics effect to the cavity is simulated. The tolerated intensity of microphonics is determined by simulation, in order to satisfy the stability of amplitude and phase with 0.1% and 0.1 degree respectively. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2903 EP - 2905 KW - cavity KW - simulation KW - linac KW - beam-loading KW - proton DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB044 UR - http://jacow.org/ipac2019/papers/weprb044.pdf ER - TY - CONF AU - Cai, H.-J. AU - Chen, L.W. AU - Yang, L. AU - Zhang, S. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The Potential of Heavy Ion Beams to Provide Secondary Muon/Neutrino Beam J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - This paper focuses on the exploration into the potential of heavy ion beams for the production of the charged pions/muons within different energy ranges which is widely needed for fundamental and applied research. The investigation is performed for the different kinds of beams involving 1H , 4He, 12C, 16O, 40Ar and 136Xe with medium energy within the range of 0.5~2.5 AGeV and high energy of 10 AGeV. Three kinds of typical target configurations, thin graphite plate, long tungsten rod and medium thickness nickel block are adopted. For comparison, graphite and nickel are also used for the long rod geometry. Basically, most of the conventional charged pion/muon beams production cases including surface muon, low energy decay muon, medium energy pion/muon for neutrino beam and highly forward energetic muon are involved and the feasibility of heavy ion beam for these cases is analyzed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3673 EP - 3675 KW - target KW - heavy-ion KW - proton KW - solenoid KW - experiment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW041 UR - http://jacow.org/ipac2019/papers/thpgw041.pdf ER -