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TY - CONF AU - Zhang, Z.L. AU - Aleksandrov, A.V. AU - Cousineau, S.M. ED - Schaa, Volker RW ED - Makino, Kyoko ED - Snopok, Pavel ED - Berz, Martin TI - Reconstruction of Particle Distributions at RFQ Exit at SNS Beam Test Facility J2 - Proc. of ICAP2018, Key West, FL, USA, 20-24 October 2018 CY - Key West, FL, USA T2 - International Computational Accelerator Physics Conference T3 - 13 LA - english AB - Fluctuations of beam parameters and uncertainties of quadrupole gradients during measurements have effects on the reconstruction of initial particle distributions. To evaluate these effects, the concept of a distribution discrepancy is proposed. Results suggest effects of fluctuations of beam parameters are small, while uncertainties of quadrupole gradients are the main factors that affect the reconstructed distributions. By comparing the measured distributions with distributions produced by tracking the reconstructed initial distributions, it is proved that the real or quasi-real (closest to real) initial distribution can be obtained as long as the minimum distribution discrepancy is found. PB - JACoW Publishing CP - Geneva, Switzerland SP - 76 EP - 79 KW - quadrupole KW - rfq KW - simulation KW - emittance KW - lattice DA - 2019/01 PY - 2019 SN - 978-3-95450-200-4 DO - DOI: 10.18429/JACoW-ICAP2018-SUPAF10 UR - http://jacow.org/icap2018/papers/supaf10.pdf ER -