The BTeV Pixel Detector and Trigger System. Simon Kwan Fermilab P.O. Box 500, Batavia, IL 60510, USA BEACH2002, June 29, 2002 Vancouver, Canada. The BTeV Spectrometer. Pixel Vertex Detector. Reasons for Pixel Detector: Superior signal to noise
The BTeV Pixel Detector and Trigger System
P.O. Box 500, Batavia, IL 60510, USA
BEACH2002, June 29, 2002
0.25 mm rad-hard FPIX2 chip
Comparing to other Pixel Detectors
Luminosity at FermiLab detectors 2x1032cm-2 sec-1
Luminosity at LHC detectors 1x1034cm-2 sec-1
The Pixel Detector (2-D Side View)
Primary-secondary vertex separation
Minus generated. s = 138m
Distribution in L/s of
Mean = 44
t proper (reconstructed) - tproper (generated)
s = 46 fs
This is made possible by a vertex detector with excellent spatial resolution, fast readout, low occupancy, and 3-d space points.
A heavily pipelined and parallel processing architecture using inexpensive processing nodes optimized for specific tasks ~ 3000 processors (DSPs).
Sufficient memory (~1 Terabyte) to buffer the event data while calculations are carried out.
The trigger will reconstruct every beam crossing and look for TOPOLOGICAL evidence of a B decaying downstream of the primary vertex. Runs at 7.6 MHz!