RHIC Operations Update: Au-Au Physics Runs and Machine Development
"Stay informed with the latest news on RHIC operations, including Au-Au physics runs, machine development, low-energy goals, and upcoming tests. Learn about the challenges faced and the progress made in the particle accelerator facility."
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Presentation Transcript
CeC running & access CeC running CeC Au running APEX IR2, STAR access EBIS Collector PS IR4 IR2, STAR access STAR magnet, chiller ATR A/C EBIS trips Landau access Power Dip
RHIC Run Coordinator Status: Au-Au Run18 Delivered Luminosity 13.5 GeV 197Au79+ x 13.5 GeV 197Au79+ Physics continues running 52+ Au-Au stores Two more dedicated periods for CeC completed Increase in failures in part attributed to weather & heat EBIS intensity and stability were issues during the past week 250 STAR Integrated Luminosity (singles corrected, 4.74b Xsection) Integrated Luminosity [ b-1] 200 150 100 50 thru fill 21885 0 0 1 2 3 4 Weeks in Physics Courtesy P. Ingrassia
Low energy Au @ 3.85 GeV Goals Provide Yellow beam for STAR fixed target run 6-24 bunches at modest intensities Machine Development in preparation for FY 2019, 2020 low energy runs Injection kicker tests: kicker rise time measurements Persistent current effects: hysteresis, optics, injection drift Fast injection losses and beam lifetime issues Setup begins following Maintenance Wednesday Reestablish Yellow beam at 3.85 GeV, 9MHz RF h=120 Provide beam on STAR target overnight for experiment setup Machine Development periods Thursday & Friday STAR runs through Monday Machine Development Monday, then switch back to 13.5 GeV medium energy run
Looking Ahead RF Landau and Acceleration Cavity test Test beam loading on cavities through gamma transition Requires high Au intensities from injectors. Scheduling needs some extra consideration of EBIS electron gun situation. CeC time at 26 GeV interleaves with 13.5 GeV ramps throughout remainder of run
