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, - - PowerPoint PPT Presentation

Jul 12, 2023 144 likes •274 views

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

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SLIDE 1

New magnet cycle beam study

March 30, 2018

  • C. Liu, P. Thieberger, A. Marusic,

Vincent, D. Bruno, Y. Luo, M. Minty

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SLIDE 2

Goal

  • Reduce high harmonic component of RHIC

superconducting dipole at medium and low

  • perating current.
  • Improve machine reproducibility for medium

and low energy operation.

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SLIDE 3

New cycle for @injection

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SLIDE 4

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.
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SLIDE 5
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SLIDE 6

Orbit

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SLIDE 7

Tune & chrom

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SLIDE 8

Q and Q’ measurement

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SLIDE 9
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SLIDE 10
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SLIDE 11

Summary

  • Beam-based measurements revealed much

reduced persistent current decay.

  • Both rings showed excellent stability.
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SLIDE 12

Plan

  • Reduce time length for the new cycle?
  • Focus on new cycle for 3.85GeV.
  • Alleviate snap-back problem during operation

ramp?