Beams Week in Review.ppt

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1、07 October 2002,All Experimenters Meeting,Beams Week in Review,Accelerator Performance Lost stores D0, CDF, Tevatron AccessPbar transfers to RecyclerTevatron StudiesGood weekend,07 October 2002,All Experimenters Meeting,Beams Week in Review,Lost Stores 1808 terminated after 12.4 hrs due to CHL fire

2、1810 lost due to quench at A1 during squeeze 1817 lost due to quench at A1 at flattop 1823 lost after 11.3 hrs due to B2 HFU 1826 terminated after 14.2 hrs TRF heater pumps turned off Shutdown Access D0 cooling fan repair Wet engine repair Instrumentation,07 October 2002,All Experimenters Meeting,Be

3、ams Week in Review,Pbar Transfers to Recycler Stacking efficiency (MI-RR) 88% Stacking efficiency(Acc-RR) overall 75% Stored 75E10 with lifetime 100 hrs Tevatron Studies Transverse Dampers Smoothed orbits up the ramp and thru the squeeze Adjusted tunes and coupling up the ramp and low beta A0 and C0

4、 aperture scans at to 980 GeV,07 October 2002,All Experimenters Meeting,Beams Week in Review,07 October 2002,All Experimenters Meeting,Peak Luminosity,07 October 2002,All Experimenters Meeting,Integrated Luminosity,07 October 2002,All Experimenters Meeting,Beams Week in Review,Recent Changes Pbar FB

5、I recalibration up 15% (9/28-#1808) New A1 optics with store 1823 ( Improvements to pbar coalescing , now 86% Current Near Term Issues Last three stores, Tev BLT not operational Losses at beginning of store (damper related?) Spikes in pbar losses during store (cause under investigation) Lower proton

6、 bunch length trials,07 October 2002,All Experimenters Meeting,Spikes in pbar losses,1830,1828,Re-scrape,1826,07 October 2002,All Experimenters Meeting,Schedule for this week,Stack n Store Week Adiabatic changes Increase proton intensity Horizontal damper (on/off) Lower proton longitudinal emittance Larger pbar stacks Pbar shots to Recycler Off the bottom Dedicated 20-40 mA stacks (if no impact on HEP),07 October 2002,All Experimenters Meeting,Schedule for this Week,