1 / 13

EMCAL HLT Roadmap

EMCAL HLT Roadmap. Federico Ronchetti EMCAL/HLT CERN , May 18 2011. Status and Outline. Hardware Installation Full EMCAL configuration on the HLT side Software Development: Triggers EMCAL HLT trigger decisions: cluster, jet, high pT electrons L0/L1 Online Trigger Monitoring

vala
Download Presentation

EMCAL HLT Roadmap

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. EMCAL HLT Roadmap Federico Ronchetti EMCAL/HLT CERN, May 18 2011

  2. Status and Outline Hardware Installation • Full EMCAL configuration on the HLT side Software Development: Triggers • EMCAL HLT trigger decisions: cluster, jet, high pT electrons • L0/L1 Online Trigger Monitoring People • Manpower

  3. RCU Interface to HLT/DAQ DAQ LDC DDL Splitters DDL Optical links HLT FEP H-RORC (FPGA) 1 SM = 2 RCUs  10 SM = 20 DDL links 1 DDL link for the STU (HW jet trigger unit) RCU 1 RCU 0 B A B A

  4. Connections Layout • 1 FEP node sees a sector in phi • No changes in the online chain setup… FEPEMCAL0 C-side A-side

  5. HLT Triggers • Cluster trigger • Jet trigger • High pT electron trigger

  6. IP TPC   R candidate EMCal Clustering g-p0 discrimination: three possible cases: opening angle << cell dimension all 0’s at this energy are in jets isolation cut well separated clusters merged clusters shower shape analysis invariant mass analysis pT<10 GeV/c 10< pT< 40 GeV/c pT>40 GeV/c • Isolated if: • no particle in cone with pT > pTthres • OR • pTsum in cone, SpT < SpTthres

  7. Clustering • V1 clusterizer in place in HLT/CALO (common code for EMCAL and PHOS) • TODO: Introduce shower shape into the V1 clusterizer • Alternative: finalize the implementation of the NxN CALO clusterizer (EMCAL N=3, PHOS N=5) • TODO: debug and test the NxNclusterizer • TODO: check geometry definitions for modifications after the upgrade to 10 SM • Cluster trigger component in place (simple threshold) need review.

  8. High pTElectron Trigger • At ET>>mqheavy quark jet production probe the color charge dependence of energy loss. • C hadrons reconstructiongoes with TPC+ITS+TRD • B hadrons need fast e-trigger for pT>10 GeV/c (where no TRD) • Identification via E/pin EMCal • TPC tracks are extrapolated and matchedto EMCal clusters Main background sources: • Dalitzdecay of neutralmesons • photon conversions in ITS and beam pipe

  9. High pTElectron Trigger TODO: Provide HLT decisions for high pT electrons • Implement the track-cluster matching on HLT side • Need extrapolation method for HLT tracks (ESD) - helix propagation to XYZ point (Sergey from TPC can help) • cut on E/P (~1) for electron candidate tracks • candidates pre-selected with requirement of • pointing to the interaction vertex • Electron dE/dx from TPC – not available right now, may not be needed.

  10. Jets TODO: Provide HLT decisions for jets: • Implement a jet finder component running the anti-kT recombination algorithm; • Inputs: central barrel track (considering pT cuts) and EMCal cells (3-vectors Ex,Ey,Ez); • algorithm removes the cells matching to the tracks before next pass • extrapolation method for HLT tracks (ESD) - helix propagation to impact point on EMCal( Sergey) • Correlation with centrality information (V0 component in place)

  11. Calibration and Monitoring TODO: • Cell energy spectra per Super Module; • Display the L0 and L1 trigger primitives • Cluster spectra with L0 trigger bit set vs overall cluster distribution; Key point: Need to associate the cluster (reconstructed data) with the trigger bit (raw data)

  12. Software Development Open Issues: Need testing HLT “offline” with its AliRoot/HLT subsystem: • We can run HLT in AliRoot with simulated data • Problem with HLT in AliRoot with real data (needed to develop online calibration and monitoring tasks) last update: end of march 2011 Need to follow this up once back at CERN

  13. EMCAL/HLT People People interested in EMCal HLT AUSTIN: • Leonidas Xaplanterisat CERN (F. Ronchetti) • Summer student at LNF (P. Gianotti) CERN: • Francesco Blanco (Huston) is considering to join • Jiri Kral(Jyväskylä) may join after his assignment to L0 is over (not easy to replace him). • PhD student from S. Paolo U. at CERN on may-june could contribute on the hi-pT electron trigger. LNF: • Post Doc person? (need to define support)

More Related