Store Summary Store Avg Init Lumi E 30
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Store Summary Store Avg Init. Lumi (E 30) Avg Deliv’d Lumi (nb-1) Time (hr) How did it end? 6908 319. 6 7887 15. 4 Normal 6909 308. 8 6665 12. 3 Normal 6916 300 6386 11. 7 Normal 6917 319 6687 11. 7 Normal 6920 280. 3 2203 2. 9 Abort T: QFA 4 trip 6922 169. 3 58 . 1 Abort T: QFA 4 trip 6926 198. 1 5011 16. 1 Normal 9927 274. 8 6817 15. 0 Normal Tevatron Coordinator - FNAL Comments Proton bunch 12 in each train blew up at flattop 10/2/2020 1
Store Summary Store Avg Init. Lumi (E 30) Avg Deliv’d Lumi (nb-1) Time (hr) How did it end? Comments 6928 272. 6 5940 11. 6 Normal Proton bunch 12 in each train blew up at flattop 6931 298. 0 6060 13. 4 Normal 6932 303. 8 Tevatron Coordinator - FNAL 10/2/2020
The lumi chart Initial Luminosity vs (Proton Intensity * Pbar Intensity) 400 Average Initial Luminosity [1030 cm-2 s-1] 350 300 Last 200 Stores Last 10 Stores 250 Last Store 200 150 100 50 0 0 5 Tevatron Coordinator - FNAL 10 15 20 25 # Prot [109] * # Pbar [109] / [106] 10/2/2020 30 35 3
Problems • D 0 Q 2 ground fault on trim cable (finally found and fixed) • D 0 Q 5 Lead trips (lead temps were too cold) • T: QFA 4 trips (number of parts replaces. problem seems to have gone away. cause not understood) Tevatron Coordinator - FNAL 10/2/2020 4
Studies/Work Completed • Progress reducing losses in squeeze at D 0 • Crystal inserted part way to diagnose temperature dependance • Wet engine maintenance. Tevatron Coordinator - FNAL 10/2/2020 5
