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TY - CONF AU - Ruo, R. AU - Du, L. AU - Du, T.B. AU - Guan, X. AU - He, Y. AU - Li, J. AU - Tang, C.-X. AU - Wang, X.W. AU - Xing, Q.Z. AU - Zhang, H.Y. AU - Zhang, Q.Z. ED - Eshraqi, Mohammad ED - Trahern, Garry ED - Schaa, Volker RW TI - H⁻ Beam Dynamics Study of a LEBT in XiPAF Project with the WARP PIC Code J2 - Proc. of HB2016, Malmö, Sweden, July 3-8, 2016 C1 - Malmö, Sweden T2 - ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams T3 - 57 LA - english AB - The 7 MeV H⁻ linac injector of Xi‘an Proton Application Facility (XiPAF) is composed of an ECR ion source, a Low Energy Beam Transport line (LEBT), a Radio Frequency Quadrupole accelerator (RFQ) and a Drift Tube Linac (DTL). The 1.7 m-long LEBT is used for matching a 40 μs pulse width 6 mA peak current beam to the entrance of the RFQ accelerator. The peak current and pulse-width of the 50 keV H⁻ beam extracted from the ion source is 10 mA and 1 ms respectively. In the LEBT, an adjustable aperture is used for scraping the peak current of the beam to 6 mA, and an electric chopper is used for chopping the beam pulse width to 40 μs. These elements make the space charge compensation problem more complicated. A careful simulation of the space charge compensation problem of the H⁻ beam has been done by considering the beam particles interacting with the residual gas with the help of WARP PIC code. To achieve the requirements of the LEBT in XiPAF, the type and pressure of the residual gas is given according to the simulation results. PB - JACoW CP - Geneva, Switzerland SP - 449 EP - 452 KW - simulation KW - space-charge KW - ion KW - rfq KW - proton DA - 2016/08 PY - 2016 SN - 978-3-95450-185-4 DO - 10.18429/JACoW-HB2016-WEPM5Y01 UR - http://jacow.org/hb2016/papers/wepm5y01.pdf ER -