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 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( %)
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. Guy Wormser, Background workshop 24 Sep 2003
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. Guy Wormser, Background workshop 24 Sep 2003
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. Guy Wormser, Background workshop 24 Sep 2003
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. Guy Wormser, Background workshop 24 Sep 2003
BABAR scorecard July 2004
Guy Wormser, Background workshop 24 Sep 2003

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

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

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

14. Guy Wormser, Background workshop 24 Sep 2003

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

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

17. Guy Wormser, Background workshop 24 Sep 2003
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. Guy Wormser, Background workshop 24 Sep 2003
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. Guy Wormser, Background workshop 24 Sep 2003
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