EMCAL HLT Roadmap Federico Ronchetti HLT/EMCAL Weekly Meetings - - PowerPoint PPT Presentation

EMCAL HLT Roadmap

Federico Ronchetti HLT/EMCAL Weekly Meetings CERN, 23 and 24 March 2011

Outline

Hardware Installation

• EMCAL new Super-Modules configuration
• n the HLT side

Software Development

• Clustering status and strategies
• EMCAL HLT trigger
• Trigger Monitoring

Looking Forward

• DCAL implementation in HLT

People

Hardware Installation at P2

• 6 new EMCAL Super

Modules (SM) installed in January 2011

• Total of 10 EMCAL

SM in place

• 1 SM = 2 RCUs

= 20 DDL links

• 1 DDL link for the

STU (HW jet trigger unit)

• SFP cables for FEP

nodes installed in CR2 by HLT crew

A-­‑side ¡ ¡view ¡

Connections Layout

• 1 FEP node

sees a sector in phi

• No changes

in the online chain setup…

FEPEMCAL0 ¡

A-­‑side ¡ C-­‑side ¡

Software Development

Clustering:

• Debug the V1 CALO clusterizer
• Finalize the implementation of the NxN CALO clusterizer

(EMCAL N=3, PHOS N=5)

• Geometry modifications after the upgrade to 10 SM

Jet finder:

• implement a jet finder component running the anti-kT

recombination algorithm;

• Inputs: track (considering pT cuts) and EMCal cells (3-

vectors Ex,Ey,Ez);

• Algorithm removes the cells matching to the tracks
• Extrapolation method for HLT tracks (ESD) - helix

propagation to XYZ point (à Sergey)

Software Development

Triggering: Provide HLT decisions for high pT electrons

• implement the track-cluster matching on HLT
• Need extrapolation method for HLT tracks (ESD)
• helix propagation to XYZ point (Sergey)
• cut on E/P (~1) for electron candidate tracks
• candidates pre-selected with requirement of

pointing to the vertex and dE/dx of an electron (TPC)

Software Development

Calibration and monitoring:

• Implement online histograms for trigger

monitoring cell energy spectra;

• cell E-spectra per Super Module;
• display the L0 and L1 trigger primitives
• A. Need to associate the cluster (reconstructed

data) with the trigger bit (raw data)

• B. Need testing with AliRoot/HLT subsystem

(still some problems there)

Looking Forward

DCAL implementation

• Extend EMCAL

will impact on the specification

• Define CALO/DCAL

Jets:

• Jets are extended objects

How to merge the jet triggers from PHOS+DCAL ?

• A. Jet finder at the detector (PHOS+DCAL) level
• B. Merger

EMCAL/HLT People

People interested (or pushed to be interested) in EMCal HLT

• Leonidas Xaplanteris (Austin U. PhD student)

will be at CERN next june-july

• 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.