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Long term projections summary

This summary covers the background projections and discussions from the 2003 workshop by Guy Wormser on the long-term projections and issues for the BABAR experiment. Topics include injection issues, data quality concerns, and conclusions for future planning. Key points such as beam-beam effects, dose rates, and specific BABAR scorecards are highlighted.

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Long term projections summary

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  1. Long term projections summary • The background projections • BABAR scorecard for today, 2004, 2006, 2009 • Injection issues • Data quality issues • Conclusions Guy Wormser, LAL Orsay Guy Wormser, Background workshop 24 Sep 2003

  2. The background projections • All based on Feb 2002 dedicated data taking • Proved essential for understanding and planning. Need to be redone before end of 2003. Data taking program and procedures need to be carefully planned • Parametrizations not yet fully uniform across subdetectors: We will get there! • « Creative » DCH parametrization leads to ~25% overestimate OK • How to describe (and extrapolate) the residual term:Background-single Her-single ler-lumi? • Existence of a linear cross term • Beam-beam effects • Very successful description of background from Feb 2002 to April 2003 • New tunes led to extra luminosity (+30%) and extra backgrounds(+50-100%) • Problem : The consequences of this step are just found now! • We have always to consider worst case scenarios: safety factor is needed Guy Wormser, Background workshop 24 Sep 2003

  3. BABAR scorecard today X: visible effect with non-zero impact - : visible effect with no impact ? : yet unknown fixed: det upgrade to fix a significant issue Guy Wormser, Background workshop 24 Sep 2003

  4. MID Dose Rates until 2009 Use Seeman model for beam currents to predict dose rates: Dose rates do not looking forbiddingly high Rates peak at roughly the current soft abort limits - DQ should still be reasonable Guy Wormser, Background workshop 24 Sep 2003

  5. Non-MID Dose Rates until 2009 • For TOP and BTM diodes both 2002 and 2001 models were used • The 2001 models with second order terms are up to 100% • Effect on integrated doses will be less than 30% • Use 2002 model for prediction non-MID diode doses Guy Wormser, Background workshop 24 Sep 2003

  6. Midplane Doses until 2009 • Module exchange in 2005 looks well timed with 4 Mrad budget • One rotation in 2007 should be able to keep MID modules installed in 2005 below 5 Mrad A rotation will move the high dose in FE:MID to other module Guy Wormser, Background workshop 24 Sep 2003

  7. BABAR scorecard July 2004 Guy Wormser, Background workshop 24 Sep 2003

  8. IFR issues Guy Wormser, Background workshop 24 Sep 2003

  9. Beam-Beam issues in IFR Guy Wormser, Background workshop 24 Sep 2003

  10. IFR and beam loss monitor Guy Wormser, Background workshop 24 Sep 2003

  11. DCH data rate issue Guy Wormser, Background workshop 24 Sep 2003

  12. BABAR scorecard July 2006 Guy Wormser, Background workshop 24 Sep 2003

  13. BABAR scorecard 2009 Guy Wormser, Background workshop 24 Sep 2003

  14. Guy Wormser, Background workshop 24 Sep 2003

  15. Injection issues • Doses • Aborts • Lost lumi • extra doses! • Durations • Quality measurement • Offile studies Guy Wormser, Background workshop 24 Sep 2003

  16. Injection issues Guy Wormser, Background workshop 24 Sep 2003

  17. 2003 Doses in Numbers Radiation doses from January to June 2003: Numbers are in krad, (%) is of dose in stable beams • Dose during stable beam is almost completely in MID plane • Radiation comes from lost particles • Injections tend to have more uniform radiation pattern • Mainly coming from HER injection and into west diodes Guy Wormser, Background workshop 24 Sep 2003

  18. Data quality issues • Faster feedback on PHYSICS quantities • « Intermediate » physics • « Journal quality » results • Define criteria • EMC-related analysis still lacking • Have long term physics goals in mind • ( Trigger, EMC, etc..) Guy Wormser, Background workshop 24 Sep 2003

  19. Guy Wormser, Background workshop 24 Sep 2003

  20. Guy Wormser, Background workshop 24 Sep 2003

  21. Guy Wormser, Background workshop 24 Sep 2003

  22. Conclusions • We have to look far ahead: Minimum 3 years • Look for worst case scenarios! • Look for end-product effects! • BABAR issues • Immediate concern: SVT ATOM chip • Next on-line: DCH DAQ • Longer term issues: SVT and EMC in 2008 • Changes in background issues • Beam-beam tails • injections • trapped events Guy Wormser, Background workshop 24 Sep 2003

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