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@InProceedings{liu:napac2019-tuplo05, author = {C. Liu and I. Blacker and M. Blaskiewicz and K.A. Brown and D. Bruno and K.A. Drees and A.V. Fedotov and W. Fischer and C.J. Gardner and C.E. Giorgio and X. Gu and T. Hayes and H. Huang and R.L. Hulsart and D. Kayran and N.A. Kling and Y. Luo and D. Maffei and G.J. Marr and B. Martin and A. Marusic and K. Mernick and R.J. Michnoff and M.G. Minty and C. Montag and J. Morris and C. Naylor and S. Nemesure and I. Pinayev and S. Polizzo and V.H. Ranjbar and D. Raparia and G. Robert-Demolaize and T. Roser and J. Sandberg and V. Schoefer and F. Severino and T.C. Shrey and K.S. Smith and S. Tepikian and P. Thieberger and A. Zaltsman and K. Zeno and I.Y. Zhang and W. Zhang}, % author = {C. Liu and I. Blacker and M. Blaskiewicz and K.A. Brown and D. Bruno and K.A. Drees and others}, % author = {C. Liu and others}, title = {{Fixed Target Operation at RHIC in 2019}}, booktitle = {Proc. NAPAC'19}, pages = {542--544}, paper = {TUPLO05}, language = {english}, keywords = {target, experiment, controls, kicker, operation}, venue = {Lansing, MI, USA}, series = {North American Particle Accelerator Conference}, number = {4}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {10}, year = {2019}, issn = {2673-7000}, isbn = {978-3-95450-223-3}, doi = {10.18429/JACoW-NAPAC2019-TUPLO05}, url = {http://jacow.org/napac2019/papers/tuplo05.pdf}, note = {https://doi.org/10.18429/JACoW-NAPAC2019-TUPLO05}, abstract = {RHIC operated in fixed target mode at beam energies 4.59, 7.3, and 31.2 GeV/nucleon in 2019 as a part of the Beam Energy Scan II program. To scrape beam halo effectively at the fixed target which is 2.05 m away from the center of the STAR detectors, lattice design with relative large beta function at STAR was implemented at the two lower energies. The kickers of the base-band tune (BBQ) measurement system were engaged to dilute the beam transversely to maintain the event rate except for 31.2 GeV/nucleon. In addition, beam orbit control, tune and chromaticity adjustments were used to level the event rate. This paper will review the operational experience of RHIC in fixed target mode at various energies.}, }