1 / 7

(Roughly) Bending Effects of Magnetic Field in VELO & TT

(Roughly) Bending Effects of Magnetic Field in VELO & TT. S. Blusk June 17, 2009. Question. Issue : In trigger, we don’t want to consider low momentum tracks, since they undergo large multiple scattering and thus have degraded resolution.

feleti
Download Presentation

(Roughly) Bending Effects of Magnetic Field in VELO & TT

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. (Roughly) Bending Effects of MagneticField in VELO & TT S. Blusk June 17, 2009

  2. Question • Issue: In trigger, we don’t want to consider low momentum tracks, since they undergo large multiple scattering and thus have degraded resolution. • Would like to avoid doing tracking in T stations, as this is likely CPU intensive. • Can we use tracking station(s) at Z=2.5 m(such as TT), to select tracks ofsufficient momentum for triggering?

  3. Basic Idea DL Bending in xz plane due to By

  4. LHCb Magnetic Field Parameterization (Based on Hall probe measurements) Use <By> = 1.8x10-4 T, DL=0.7 m Use <By> = 0.02 TDL = 2.5 m CHEP 07

  5. Displacement from linear projectionat TT 60 um

  6. Displacement from linear projectionat end of VELO

  7. Preliminary Conclusions • A station at TT could provide a “momentum selection” • Need a real simulation to see if we pick up too many hits in current TT • Maybe finer granularity needed • No gaps, obviously • Will do a more realistic GEANT simulationvs luminosity • Perhaps slightly higher field can be obtained in region between VELO and TT?

More Related