Author :
Berenyi, A. ; Chen, H.K. ; Dao, K. ; Dow, S.F. ; Gehrig, S.K. ; Gill, M.S. ; Grace, C. ; Jared, R.C. ; Johnson, J.K. ; Karcher, A. ; Kasen, D. ; Kirsten, F.A. ; Kral, J.F. ; LeClerc, C.M. ; Levi, M.E. ; von der Lippe, H. ; Liu, T.H. ; Marks, K.M. ; Meyer,
Abstract :
The transverse momentum discriminator module (PTDM) is one of the three main modules used in the level 1 charged particle trigger system of the BABAR detector at PEP-II. It provides trigger decisions for charged particles with a transverse momentum, Pt, greater than a configurable threshold. The transverse momentum discrimination algorithm works by evaluating the curvature of the charged tracks in the 1.5 T axial magnetic field. The capabilities of the PTDM are key to a stable and efficient operation of the BABAR experiment even under severe background conditions
Keywords :
discriminators; drift chambers; high energy physics instrumentation computing; nuclear electronics; real-time systems; trigger circuits; 1.5 T; BABAR detector; BABAR level 1 trigger system; axial magnetic field; charged particle trigger system; configurable threshold; drift chamber; realtime transverse momentum discriminator; severe background conditions; transverse momentum discriminator module; Contracts; Detectors; Laboratories; Logic; Magnetic fields; Particle tracking; Physics; Printed circuits; Real time systems; Spatial resolution;
