Study of a neural approach for lower level e/γ calorimeter trigger in CMS
نویسنده
چکیده
We investigate the possibility of using Neural Network based algorithms at the lower stages of the electron/photon calorimeter trigger of CMS. The aim is to improve the background rejection obtained with currently proposed level 1 algorithms. The shower profiles are analysed in detail in the classification procedure, using the ECAL fine structure information of the trigger tower. As it can be expected, severe restrictions constrain at this level the algorithmic implementation possibilities.
منابع مشابه
CMS REGIONAL CALORIMETER TRIGGER HIGH SPEED ASICs
The CMS regional calorimeter trigger system detects signatures of electrons/photons, taus, jets, and missing and total transverse energy in a deadtimeless pipelined architecture. This system contains 20 crates of custombuilt electronics. Much of the processing in this system is performed by five types of 160 MHz digital ASICs. These ASICs have been designed in the Vitesse submicron highintegrat...
متن کاملRequirements for a Fine Grain Calorimeter Trigger
The physics motivations for a fine grain 1st level electron/photon trigger which exploits the properties of the CMS crystal calorimeter are briefly introduced. An implementation architecture that extends the present design of the CMS calorimeter trigger is described. We then discuss the characteristics and the requirements of the electronic circuits needed to implement the fine grained trigger ...
متن کاملSecond level electron/photon calorimeter trigger in CMS. Simulation study with CMSIM data
We present in this note preliminary results on the second level e= trigger studies. Using the full granularity in the ECAL, CMSIM simulated data, and a dedicated algorithm, the trigger rate can be reduced by factors 7 (with marginal reduction of the e= efficiency, 2%), with respect to the rates obtained after the first level trigger. a) On leave from LIP, Lisbon, Portugal
متن کاملLevel-1 Regional Calorimeter Trigger System for CMS
The Compact Muon Solenoid (CMS) calorimeter regional trigger system is designed to detect signatures of isolated and nonisolated electrons/photons, jets, τ-leptons, and missing and total transverse energy using a deadtimeless pipelined architecture. This system contains 18 crates of custom-built electronics. The pre-production prototype backplane, boards, links and Application-Specific Integrat...
متن کاملBeam tests of the trigger and digital processing electronics for the electromagnetic calorimeter of the CMS experiment
A prototype of the trigger and digital processing electronics for the electromagnetic calorimeter of the CMS experiment, coupled to a prototype of the PbWO4 crystal calorimeter, was tested during summer 96 in the H4 beamline at the CERN SPS. A very successful operation was achieved for this system, which runs in synchronous and pipelined mode at the LHC clock frequency, and performs the basic t...
متن کامل