Summary from NIU Workshop and Summary from NIU Workshop and PraguePragueS. R. Magill

Physics and Detectors for a 90 to 800 GeV Linear Collider:

Third Workshop of the Extended ECFA/DESY Study Prague, 15th-18th November 2002

Workshop on simulation, energy-flow algorithms, and software for the Linear ColliderNovember 7 – 9, 2002

Agenda of the NIU Agenda of the NIU WorkshopWorkshop

Day 1 : Simulation and Analysis ToolsLCD software – JAS and LCDROOTEuropean perspectivesGEANT4 StatusDemos and Tutorial with JAS

Day 2 : CAL Reconstruction/E-Flow AlgorithmsECAL/HCAL issuesApproaches to E-Flow AlgorithmsDiscussion on Simulation/Software Priorities

Day 3 : Wrap-up, new simulation/analysis plans, etc.

Web site - http://nicadd.niu.edu/ws/

Simulation/Analysis Tools HighlightsSimulation/Analysis Tools Highlights

Working towards - GEANT4 for everyone

In the spirit of 1 Linear Collider -> 1 G4 executable worldwide?

What is needed to achieve this :

Common input format from generatorsOutput compatible with analysis packages

–> interfaces for existing packages - JAS, ROOT, etc.

Common Geometry description package-> all existing detectors, new designs, easy modifications to existing models

Common data definitions-> E-Flow record

A general discussion: towards a Geometry Description Language?

“Specifications for a detector geometry description language” at http://polype.in2p3.fr/geant4/tesla/www/index.html#dgdl

Could generate GDML code (see the “Geometry Description Markup Language” project at gdml.web.cern.ch)

Missing human resources to seriously start it!

Newsub-detectors

Simulation Reconstruction Analysis

Common Geometry Access (CGA) API

Geometrydatabase DGDL

CAL Reconstruction/E-Flow HighlightsCAL Reconstruction/E-Flow Highlights

E-Flow Algorithms – variety and complementarityClustering – emphasizing “traditional” calorimeter analysis techniques

- Fuzzy clustering (minimize cal cell “distance” to combine into clusters)- Cluster ID neural network (using cluster properties to define E-Flow objects)

Track extrapolation – linking cal cells to found tracks- Analog version for ECFA TileCal (SNARK)- Digital version under development (many places)

Hit density gradient – defining digital clusters- Split/merge clusters- Find cluster boundaries

Particle reconstruction in CAL models- Photons (known cluster shape)- Muons (calorimeter MIP tracking)- Neutral hadrons (Analog/Digital energy resolution)

-Alternatives to SD/LD detectors

- See web site for all the details

Programme of the Prague Workshop Programme of the Prague Workshop (of interest to the Calorimeter Working (of interest to the Calorimeter Working Group)Group)Web site – http://www-hep2.fzu.cz/ecfadesy/ECFA-DESY_Praha2002.htm

Calorimeter Working GroupProgress in hardware/electronics development – ECAL/HCALApproaches to E-FlowTestbeam prospects

Simulation Working GroupMove to G4Continued analysis with fast MCsWorldwide compatibility

Overall Detector Performance PresentationsGlobal tracking performanceE-Flow results

NEW

Calorimeter Working Group Calorimeter Working Group HighlightsHighlights

- See web site for many hardware details

ECAL : Sampling tungsten-silicon

Sampling radiator-tile

HCAL : Sampling radiator-scintillator tiles

Sampling radiator-gas detector

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CALICE CALICE W-Si Rint~170 Pad 1x1 cm

SD-LCD W-Si Rint~120 (SLAC-Oregon) Pad 0.5x0.5cm

LCCAL 5x5cm tiles (Italian labs) 3 silicon layers

ACFA choice 4x4cm tiles 2 layers fibers

Staggered tile Rint~160 (Uni. Colorado) tile 5x5cm

CALICE CALICE tile-HCALtile-HCAL projective tiles 9 layers

CALICE CALICE DHCAL ( Pad 1x1cm 1bit-readout

40 layers

And some exotic proposals (crystal ECAL,…)

CALICE CALICE performances performances studies includestudies include Performance variation with dead wafers, with inter-calibration(Only ECAL), with pad size (DHCAL), perf. on jets with HCAL resolution, with variation of X0 in tungsten plates,…

Electronics readout performances,noise,etc…is included (ECAL only)

Performance with jets (at Z peak for both HCAL option)

Performance with jets at high energy (numerical values for tile HCAL)

Studies of DHCAL performance (single track) with radiator (steel, tungsten,…) , with pad size.

Electron, muon ID. for isolated particle/in jets (better than ALEPH…)

TO DOTO DO Almost everything

- performances with pad size, with layer numbers (partly done for ECAL)- performances at high energy (including boson mass) - input for the electronics (HCAL mainly)- input for Lumi. measurement (end-cap), input for TPC T0 calibration.…………

What's new II: RPCs in HCALAnd a little controversial!

G10Gas Chamber

GlassIron

Iron

SpacersMagnetic field direction

Mokka, impact of the gas in HCALElectrons PionsGas GasScin Scin

Simulation Working Group HighlightsSimulation Working Group Highlights

Overall detector performance WG Very Short Term Priorities

Common language Reconstruction data model included in the general/common framework coordinated by simulation people i.e. Ties Behnke & Franck Gaede

Next month Before end of 02

First Intermediate meeting Early beginning of January 03 MINI-WORKSHOP

Collect the existent developments

Make them public available

Fill the missing holes

Welcome new comers

Go ahead to Amsterdam

involving different sub-detectors e.g. Tracking, EFLOW, Flavor ID

Following data model presc. and feed back to Franck & al.

Full list of items on Web page

A preliminary list of items we may discuss during this Mini-Workshop

Reconstruction data model (improvements, feed back to simulation people)Status of what exists (enlarge the vision e.g. CMS, Belle VTX algo. As commented during this session)How to make them public available if not yet (time scale, effort needed, performances, contents, algorithms involved, detector based on, …)How to move to a or a various event reconstruction packages merging tracking reconstruction w/ ‘eflow’ reconstruction clusters, include ID flavor (missing pieces, foreseen improvements, effort needed, what one side need from other sub-detectors, e.g. hits information from back track interaction not coming from IP, as commented during this session)What are the benchmark processes we want to exam at first priority (Which key numbers)How we intent to perform the comparisons and share the work.Comparisons to test the various sub-detectors options, test the sub-detectors parameters in a whole detector context e.g. numbers of layers, pad size, VTX techno, added options, TPC geometry, Quad position, …

Impact on Future WorkImpact on Future Work

Plan to have future workshops focussing on CAL simulation and analysis emphasing E-Flow algorithms

At NIU and Prague, started discussion that could lead to a very flexible, maintainable, and compatible simulation/analysis environment for worldwide LC detector study/design.

At Prague, new study group organized to address specific issues of E-Flow reconstruction, etc., across subdetector boundaries.