1 / 19

Trickle Background Investigation

Trickle Background Investigation. SVTRAD sees large dose from LER Trigger counts often don’t correlate LER injection backgrounds worse after March 7 Analyze injection sampling triggers to see BaBar readout Compare date from late Run5 and Run6. SVT Integrated Dose per LER Injection

lvanwormer
Download Presentation

Trickle Background Investigation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Trickle Background Investigation • SVTRAD sees large dose from LER • Trigger counts often don’t correlate • LER injection backgrounds worse after March 7 • Analyze injection sampling triggers to see BaBar readout • Compare date from late Run5 and Run6

  2. SVT Integrated Dose per LER Injection ( BEMid, BETop, BEBot ) Run5 Run6

  3. SVT Integrated Dose per HER Injection ( BWMid, BWTop, BWBot ) Run5 Run6

  4. Integrated Triggers per LER Injection [# of revolutions which generate background] ( EMC, DCH ) Run5 Run6

  5. Integrated Triggers per HER Injection [# of revolutions which generate background] ( EMC, DCH ) Run5 Run6

  6. BaBar Readout • Each injection BaBar samples the detector at a couple different revolutions of the injected bunch. • The particular revolutions which are sampled is scanned over many injections. • We can reconstruct a picture of the average background per injection for each revolution of the injected bunch. • Currently, this scan is done over the first 525 revolutions.

  7. LER Injection - SVT Readout Aug 6, 2006 Apr 1, 2007 short-term bkg No long term bkg

  8. LER Injection - SVT Readout Aug 6, 2006 Apr 1, 2007

  9. LER Injection - EMC Readout Aug 6, 2006 Apr 1, 2007 Pre-amp saturation effect

  10. LER Injection - EMC Readout Aug 6, 2006 Apr 1, 2007

  11. LER Injection - DRC Readout Aug 6, 2006 Apr 1, 2007 DRC is sensitive to this long-term bkg. SVTRAD may see this as well.

  12. LER Injection - DRC Readout Aug 6, 2006 Apr 1, 2007

  13. Observations • SVTRAD/trigger LER injection monitoring indicates large dose over a small period. • BaBar readout confirms that the detector is getting more exposure in first ~15 revolutions. • EMC is suffering saturation effects for ~250 usec after LER injection • DRC sees late activity (>100 revolutions) in LER backgrounds as well – may be visible to SVTRAD diodes but not the trigger system. • HER injection is generally worse as well, but not as big a difference from Run5.

  14. Extra Slides

  15. LER Injection - DCH Readout Aug 6, 2006 Apr 1, 2007

  16. LER Injection - DCH Readout Aug 6, 2006 Apr 1, 2007

  17. HER Injection - SVT Readout Aug 6, 2006 Apr 1, 2007

  18. HER Injection - EMC Readout Aug 6, 2006 Apr 1, 2007

More Related