TY  - CONF
AU  - Wang, Y.
AU  - Dai, J.P.
AU  - Fan, M.X.
AU  - Li, A.H.
AU  - Li, B.
AU  - Liu, H.C.
AU  - Qu, P.H.
AU  - Sha, P.
AU  - Wu, X.L.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Optimization of SC Cavity Type for CSNS Linac Upgrade
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - In order to increase CSNS beam power from 100kW to 500kW, the Linac injection energy need to be increased from 80MeV to 300MeV. The combined layout of superconducting spoke cavities and elliptical cavities will be adopted to accelerate H⁻ beam to 300MeV. Two operation frequency of spoke cavities were compared with single and double spoke structure, a compact 648MHz βg=0.4 single spoke cavity was proposed, and the RF performance was presented, as well as the MP behavior.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 987
EP  - 989
KW  - cavity
KW  - linac
KW  - operation
KW  - neutron
KW  - acceleration
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS056
UR  - http://jacow.org/ipac2019/papers/mopts056.pdf
ER  - 

TY  - CONF
AU  - Xu, S.Y.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Beam Commissioning Experience of CSNS/RCS
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The China Spallation Neutron Source (CSNS) is an accelerator-based science facility. CSNS is designed to accelerate proton beam pulses to 1.6 GeV kinetic energy, striking a solid metal target to produce spallation neutrons. CSNS has two major accelerator systems, a linear accelerator (80 MeV Linac) and a 1.6 GeV rapid cycling synchrotron (RCS). The Beam commissioning of CSNS/RCS has been commissioned recently. Beam had been accelerated to 1.6 GeV at CSNS/RCS on January 18, 2018 with the injection energy of 80 MeV. The machine parameters are measured and optimized. The beam power is increased step by step. The beam power achieved 50kW in January, 2019. In this paper, the commissioning experiences are introduced.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1012
EP  - 1014
KW  - injection
KW  - MMI
KW  - quadrupole
KW  - betatron
KW  - closed-orbit
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS068
UR  - http://jacow.org/ipac2019/papers/mopts068.pdf
ER  - 

TY  - CONF
AU  - Fan, M.X.
AU  - Chen, Q.
AU  - Fu, S.
AU  - Li, A.H.
AU  - Li, B.
AU  - Liu, H.C.
AU  - Peng, J.
AU  - Qu, P.H.
AU  - Wang, A.X.
AU  - Wang, Y.
AU  - Wu, X.L.
AU  - Xiaolei, X.L.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Multipacting Studies of the Coaxial Coupler for BNCT DTL
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Multipacting is a phenomenon in which electrons grow sharply under certain conditions in a RF structure. It may lead to the breakdown or even damage to the equipment. Therefore, it is very important to calculate the Multipact-ing range in the RF equipment design. Since the phe-nomenon is too complicated to use the formula to fully predict it, numerical simulation is employed. There are many computer codes (such as Track3P, MultiPac, CST PS, etc.) used to simulate the phenomenon, but most of them are not commercial. In this paper, theories used in coaxial line for predicting multipacting are introduced; the CST PS is chosen to simulate the multipacting of coaxial coupler for BNCT DTL; finally, methods of sup-pressing multipacting are discussed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2921
EP  - 2924
KW  - multipactoring
KW  - simulation
KW  - DTL
KW  - impedance
KW  - neutron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPRB050
UR  - http://jacow.org/ipac2019/papers/weprb050.pdf
ER  - 

TY  - CONF
AU  - Li, M.T.
AU  - An, Y.W.
AU  - Wang, S.
AU  - Xu, S.Y.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - The Synchronization between BPMs and Corrector Power Supplies in AC Mode of RCS of CSNS
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 introduces our effort for synchronizing BPMs and Corrector Power Supplies in AC mode of RCS of CSNS. This work helps to increase the accuracy of the response matrix measurement, the obit correction, and other commissioning task.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3164
EP  - 3166
KW  - power-supply
KW  - timing
KW  - MMI
KW  - pick-up
KW  - neutron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPTS029
UR  - http://jacow.org/ipac2019/papers/wepts029.pdf
ER  -