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Week in Review: 04/14/03 –04/21/03

Store and Operations Summary Standard Plots. Week in Review: 04/14/03 –04/21/03. Keith Gollwitzer – FNAL. Store Summary. Summary of Problems. TeV Abort due to low  quad power supply Abort due to power supply failure on control chassis Separator spark Proton Source

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Week in Review: 04/14/03 –04/21/03

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  1. Store and Operations Summary Standard Plots Week in Review: 04/14/03 –04/21/03 Keith Gollwitzer – FNAL

  2. Store Summary K. Gollwitzer - FNAL

  3. Summary of Problems • TeV • Abort due to low  quad power supply • Abort due to power supply failure on control chassis • Separator spark • Proton Source • B:ORBMP power supply maintenance/repair • Booster RF; Multiwire flapping in 400MeV line • MI/RR/Pbar/Other • MI RF station • Recycler vacuum work competed and investigated • Pbar Debuncher extraction kicker cable fried • SDA failed to record for a store K. Gollwitzer - FNAL

  4. UnscheduledMaintenance & Studies • TeV Transverse Dampers and Coupling • TeV Octupoles and stability • TeV Orbit Smoothing • TeV FW diagnostic study • New Helix aperture and lifetime studies • TeV microwave Schottky were made functional K. Gollwitzer - FNAL

  5. Correlation of Quad Trim Power supply and Losses Losses Power Supply K. Gollwitzer - FNAL

  6. Correlation of Quick Orbit Excursions and Losses Losses Orbit V&H K. Gollwitzer - FNAL

  7. Missing SDA store 2433 Total Integrated Luminosity for the week: 7.1pb-1 ORBMP work K. Gollwitzer - FNAL

  8. Integrated Luminosity & Goals Goal curves were defined in Oct 02 K. Gollwitzer - FNAL

  9. Many studies and some maintenance

  10. Tevatron orbit smoothing • Goal is to keep orbits stable to within ~0.5 mm. • Present day orbit is off by ~ 2 mm in some location. • Several corrector dipoles are near the 50 Amp limit. (This has interfered with orbit smoothing lately.) • Several correctors in close proximity have large but opposite currents. +4 mm Horz -4 mm Vert Present orbits in the Tevatron From M. Martens and TeV group K. Gollwitzer - FNAL

  11. Goal of (this weeks) orbit smoothing • We used a “standard” smooth procedure since Nov ‘02. (This would take ~ 2 hours for a smooth.) • Orbits have drifted too far from the nominal since March. • Our aim is: • Adjust orbit positions to keep beam centered. • Reduce strengths in correctors. • Adjust tunes after smoothing. • Find a “Standard” orbit than can be maintained with ~ 2 hour smooth. From M. Martens and TeV group K. Gollwitzer - FNAL

  12. Summary • The week • 101 store hours • Bad Luck: two aborts and separator spark • ORBMP still required attention • Th,F,Sa stores started with record protons at collisions • Overall a very good week. • Goal for this week • 5 Shifts of studies • Hope to continue increases in luminosity • Continue with stable store running K. Gollwitzer - FNAL

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