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Report from Vienna

225 registered participants: very well attendedfairly large number of non-EU participants: good sign on the road to

larger international organisation

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Schedule

Dense schedule of plenary and parallel talks

in general little contact to the accelerator world: BAD!

clear trend: less physics, more detector

relatively few talks in the physics sessionsrelatively few people attending the physics sessions

the focus of physics: cosmology (lot of talk, but not so much news,

comment that US has strong community and we need to increase EU involvments)

SUSY (most interesting studies at the moment are happening in the area of SUSY studies)

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Role of ECFA meeting

„regional meetings“:

more or less once a year per regionless formal than LCWSlarger attendance from regional people, in particular students

but trend should be to make them more and more international

The current meetings idea:

one LCWS per year (next one in Bangalore, India, March 2006) one regional workshop per region per year many special purpose meetings in between

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Detectors

Structure a bit confusing:

detector working groups detector concept groups

detector performance groupnot ECFA workshop, but lots of effortscurrently happening in the concept groups

traditionally the focus of the ECFA study,extremely active groupslots of news and results

caught in the middle, no clear mandate,no clear „group“at this point

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Machine Advisory Committee reports to ILCSC and GDE

3 WWS co-chairs part of the GDE

ILCSC

GDE

WWS

Acc WGs Det Concepts

Oversight

Management

MAC

Jim Brau, Francois Richard, Hitoshi Yamamoto

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Time scales

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Milestones

Spring 2006 (in time for LCWS 2006)

Detector Outline Document

a brief document summarizing the layout of the different detector concepts including preliminary costing estimates

Reference Design Report

End of 2006

one volume as part of the machine RDR to summarise the detectors and the physics caseincluding costing

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Highlights from Vienna

This is a personal selection of some of the highlights of Vienna

This is not exhaustive!

MDI

Detector concepts

TPC results

Calorimeter news

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MDI

No report here on detailed discussions,

but

very intense and interesting discussion on the crossing angle

clear and strong interest by the community

detector community feels a bit decoupled from the accelerator community

issue of gamma-gamma interactions is being brought up again by the experimental community

Only content remark: anti-DID seems a way to save the large crossing angles: needs intense study by the community to verify the claims!

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Detector concepts

Three well known concepts: SiD, LDC, GLD

presentations by SiD and GLD, LDC meeting after Vienna

One new concept

very differnet approach to the calorimeter,otherwise similar to SiD

Fourth Concept Detector (“4th”)

New members: Univ. New Mexico: Michael Gold, John Matthews, John Strologas (at Fermilab) Fermilab: M. Atac ISU: Sehwook Lee TTU: Sungwon Lee

N. Akchurin, Texas Tech University, R&D contact J. Hauptman, Iowa State University, contact

• •

•Pixel Vertex (PX) 5-micron pixels (Fermilab design)

•TPC (like GLD or LDC) with silicon strips on outer radius

•Triple-readout fiber calorimeter: scintillation/Cerenkov/neutron (new)

•Muon dual-solenoid geometry (new), with ATLAS drift tubes.

Basic conceptual design: four subsystems

Triple-readout optical fiber calorimeter

● Spatial fluctuations are huge ~λint with local high density EM deposits: fine spatial sampling with scintillating fibers every 2mm

● EM fraction fluctuations are huge, 5→95% of total shower energy: insert clear fibers generating Cerenkov light by electrons above Eth = 0.25 MeV measuring exclusively the EM component of the shower (mostly from π0→γγ)

● Binding energy (BE) losses from nuclear break-up: measure MeV neutron component of shower.

Lesson 6: To improve energy resolution, measure every fluctuation event-by-event

Main theme: multiple measurements of every shower

• Fine spatial sampling

• EM fraction fluctuations

• MeV neutrons, i.e., binding energy losses

• Like SPACAL

• DREAM module

•

• ILC-prototype (new)

Muon system: new dual-solenoid geometry

(I apologize for the crudeness of these plots … real calc at Fermilab)

Return tracking B-field through annulus formed by outer, reverse solenoid.

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Tracking

Very well attended session,

many talks with lots of new results

First real results shown by the micro-megas community on resolutions

Recent test beam at KEK with resistive foils look very encouraging

50 m pillars

drift gap

meshamplification gap

Al-Si Cermet mylar 50μm

ideaidea: a uniform high resistivity 1 M/ Al-Si Cermet is glued on the pad plane

for more info: see presentation by Madhu Dixit at the ILC 2005 Snowmass workshop Vincent Lepeltier LAL Orsay ECFA Vienna, November 14-18th 2005

data quality control: event display

Vincent Lepeltier LAL Orsay ECFA Vienna, November 14-18th 2005

MPI TPCfunny event!

low momentum particle (r=3.5cm at 1T)

results: resolution vs Z

Vincent Lepeltier LAL Orsay ECFA Vienna, November 14-18th 2005

Ar/iC4H10:95/05@1T

Carleton Ottawa TPCπ+ beam E=80V/cm

σ0 = 83 ± 22 µm

CD/√Neff = 57 ± 3 µm/√cm

MPI TPC π+ beam E=220V/cm

preliminary

σ(mm)

VERYVERY preliminary!!

analysis program notoptimised for

PRF

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Particle Flow and Recosntruction

Quite some talks on efforts to develop realistic reconstruction algorithms

Nice to see: people start to use the tool developed (many developed here at DESY)

Example:

Two contributionsMark Thompson: Development of a particle flow algorithm

Pascal Gay: Higgs self coupling analysis

Particle Flow Algorithms in MARLIN

LEPTracking TrackCheater

TrackWiseClustering MAGIC

Digitisation

WOLF

PandoraPFA

Sim. Hits

PFOs

HitsHits

TracksTracks

Clusters

PFOs Clusters + PFOs

Snowmass

Vienna

PandoraPFA/WOLF/MAGIC share many common features Will briefly discuss some of the main points of the new Algorithm

Cluster Association II : Backscatters

Project track-like clusters forwardand check distance to shower centroidsin subsequent N layers

Also look for track-like segments at startof cluster and try to match to end of another cluster

Forward propagation clustering algorithm has a major drawback: back scattered particles form separate clusters

4.4 GeVRPC (MAGIC)

4.1 GeVTile HCAL

4.3 GeVRPC HCAL

RMS (90%)

RMS of Central 90 % of Events

• RMS (90 %) is somewhat larger than width of fitted peak

Wolf Results (Z uds)

(Results for Reco Tracks)

only weakly depends on B

2 Tesla 4 Tesla

6 Tesla

37.0±0.3 %6 Tesla

35.8±0.3 %4 Tesla

35.3±0.3%2 Tesla

E/E = √(E/GeV)B-Field

RMS of Central 90 % of Events

PandoraPFA Results (Z uds)

(Results for Cheated Tracks)

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Calorimetry

Very well attended session,

many talks with lots of new results

Main thrust: testbeam effort

And R&D on new technologies;Sensors, microelectronics

ECAL prototype at DESY

Prototype tested so far at DESY had 14 layers (~7X0) out of 30 planned, and 18x12 1cm2 Si pads compared to 18x18 planned.

Tested with 1-6 GeV electrons incident at various points over the front face, and at normal incidence and at 10o, 20o, 30o.

Will focus on 1 GeV normal incidence sample unless otherwise stated.

Further details shown in calorimeter session talks. Data (calibrations etc.) still preliminary

Transverse profile (w.r.t. barycentre)

1 GeV e-

Pretty good, with low cutoffs.Important for clustering

studies.

ECFA Vienna 05 - calorimetry session J.-C. Brient (LLR)

The first module216 tiles with SiPM readout

after cabling

very front-end electronics

ECFA Vienna 05 - calorimetry session J.-C. Brient (LLR)

MPPC from Hamamatsu

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Summary

Vienna meeting was a very nice meeting,

nice location, good organisation (except for the internet access)

Nice: informal athmosphere, much less competetive than LCWSnice chance for discussions and for students

Nice: number of participants

Nice: activities in Europe are still strong, a number of new faces and new groups are soming on board.