New magnet cycle beam study March 30, 2018 C. Liu, P. Thieberger, - PowerPoint PPT Presentation

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New magnet cycle beam study March 30, 2018 C. Liu, P. Thieberger, A. Marusic, Vincent, D. Bruno, Y. Luo, M. Minty Goal Reduce high harmonic component of RHIC superconducting dipole at medium and low operating current. Improve machine

New magnet cycle beam study March 30, 2018 C. Liu, P. Thieberger, A. Marusic, Vincent, D. Bruno, Y. Luo, M. Minty
Goal • Reduce high harmonic component of RHIC superconducting dipole at medium and low operating current. • Improve machine reproducibility for medium and low energy operation.
New cycle for @injection
Plan • Run new hysteresis, machine tuning, make measurements (orbit, tune, chrom) for drift correction to be compared with that at injection energy during normal operation. • Run hysteresis again, make measurements to quantify machine reproducibility. • ~5 hrs.
Orbit
Tune & chrom
Q and Q’ measurement
Summary • Beam-based measurements revealed much reduced persistent current decay. • Both rings showed excellent stability.
Plan • Reduce time length for the new cycle? • Focus on new cycle for 3.85GeV. • Alleviate snap-back problem during operation ramp?

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New magnet cycle beam study March 30, 2018 C. Liu, P. Thieberger, - PowerPoint PPT Presentation

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Influence of DC & Phase Shift On Power Measurement of WHM Presentation in (Korea Electric

Sean K. Carey School of Geography & Earth Sciences, McMaster University, Hamilton, Ontario,