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Tevatron Coordinator Report Summary Dec 19, 2019

Read the summary of issues, problems, completed work, and study requests from the Tevatron Coordinator's report on December 19, 2019, at FNAL. Find out about pump failures, tuning adjustments, and study requests. Stay informed about the latest updates.

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Tevatron Coordinator Report Summary Dec 19, 2019

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  1. Bruce vs Tan Bruce, hard worker Tan, lazy hamburger

  2. Store Summary Tevatron Coordinator - FNAL 12/19/2019 2

  3. Store Summary Tevatron Coordinator - FNAL 12/19/2019 3

  4. Problems • E3 sump pump failed requiring an access • A33 roughing pump died and required an access • VA47 was running to hard, reduced current • D43 roughing station is dying • D0 Q2 current changed by 2 amps during Store 6829 and had a ground fault. Also C4 frig was .7K warmer than normal. • C4 flywheel replaced • A01V collimator front end needed to be rebooted before scraping could begin on Store 6829 • St6833: CT did not work because initial chroms out of CT range. Ch<0 and Cv=+13. • St6834: Quenched F3 and DD when Kautz Road substation glitched from lightning strike. (Note: clean abort). Water in C sector. Ground fault. Tevatron Coordinator - FNAL 12/19/2019 4

  5. Studies/Work Completed • Lowered horizontal tune at Flattop and in Seq 2-13 to get below .583 • Raised horizontal tune at Seq 14-15 by .004 to try to fix D0 losses • Raised vertical tune at Seq 23-25 to bring vertical tune above .583. • Replaced A33 roughing station • Improved tunes at Low Beta and coupling at collisions. • St6833: smooth sent out for st6834. Tevatron Coordinator - FNAL 12/19/2019 5

  6. The Numbers

  7. Weekly Lum.

  8. Lum. Vs. P×Pbar

  9. D0Q2 Voltage to ground issues

  10. Pbars bigger, probably from PBJ.

  11. Less proton loss

  12. Less loss at D0

  13. Some interesting Dipole Currents at Collisions

  14. Study Requests • Bumper magnet abort gap clearing studies (150gev 2 hours ) • Chromaticity Tracker (150gev 2 hours Tan) • Tune mult calibrations ( EOS 2 hours Ron) • Separator bumps (150 Gev 1-2 hrs) • Lattice measurement (Collisions 2 hours) • Cogging (EOS?) • Test moving collimators to touch beam in preparation for shielding CDF during squeeze. (Proton only, Annala)

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