Report from WWS and charge to the workshop

Hitoshi Yamamoto

3/3/05 KEK

H.Yamamoto

ILC Parameters

■ 1st stage Energy 200→500 GeV 500 fb-1in first 4 years + 500 fb-1in next 2 years

■ 2nd stage Energy upgrade to ~1TeV 1000 fb-1in 3-4 years

■ OptionseeeGiga-Z

■ To start ~2015

■ 2IRs (probably)

(http://www.fnal.gov/directorate/icfa/LC_parameters.pdf)

H.Yamamoto

Technology choice done (ITRP):Things are starting to roll...

■ The name is officially decided to be ILC (International Linear Collider)

■ GDE (Global Design Effort) - the first stage of GDI (Global Design Initiative) - is being formed

LC machine efforts are being re-organized

around the cold technology

• First ILC workshop (Nov 13-15, KEK)

• Second ILC workshop at Snowmass (Aug 2005)

H. Yamamoto, Kyoto LHC 2004

GDE structure

H.Yamamoto

Detector Timeline by WWS

(2004) ITRP tech. recommendation

3 panels (costing, detector R&D, and MDI)

being set up

(2005) Accelerator CDR Detector outline document submitted to WWS (proto-CDR) ~ spring 2006

(2007) Accelerator TDR WWS receives CDR from each detector concept team

(2008) LC site selection Collaborations form and submit LOIs for proposal to the global lab

Site selection + 1yr Global lab selects experiments.

H.Yamamoto

■ R&D panel 3 members from each region, balanced over expertise

and region. Close to final selection. Register the detector R&Ds (incl. MDI) Evaluate them wrt detector concepts (document it ~Au

g 2005) Coordinate with regional review processes

■ MDI panel Liase with machine efforts (GDE) Existing LCWS leadership of MDI acts as this

(Bambade, Woods, Tauchi)

■ Costing panel Currently not materializing yet

H.Yamamoto

Detector Outline Document■ To be completed in Spring 2006 by each detect

or concept study group, and submitted to WWS

■ Contents Description of the concept Performance estimate wrt physics benchmar

ks Required R&Ds and their status Rough costing estimate

■ Could be called ‘proto-CDR’

■ Real detector CDR not far away (in 2 years)

H.Yamamoto

Milestones of ILC (sugimoto)

GDE (Design) 　 (Construction)

TechnologyChoice

Acc.

2004 2005 2006 2007 2008 2009 2010

CDR TDR Start Global Lab.

Det. Detector Outline Documents

CDRs LOIs

R&D PhaseCollaboration Forming 　 Construction

WWS

Detector R&D Panel

TevatronSLAC B

LHCHERA

T2K

Done!

H.Yamamoto

Workshops near future

■ LCWS 2005, Stanford. 3/18-23/2005

■ ACFA 8, DaeGu, Korea, 7/11-14/2005

■ Snowmass (ALCPG~WWS), 8/14-27/2005 (~2 weeks)

Held together with the ILC workshop

■ ECFA ~ 11/2005

■ LCWS 2006, India ~2 or 3/2006

(Detector concept outline)

H.Yamamoto

Detector Performance Goals

■ Vertexing, b,c tags ... 1/5 rbeampipe,1/30 pixel size wrt LHC :

■ Tracking, tagged Higgs ... 1/6 material, 1/10 resolution wrt LHC :

■ Jet energy (quark recon.) W,Z separation... 1/2 resolution wrt LHC :

€

σ ip = 5μm ⊕10μm / psin3 / 2 θ

€

σ(1/ p) = 5 ×10−5 /GeV

€

σE / E = 0.3/ E(GeV)

H.Yamamoto

Jet(quark) reconstruction

■ With , Z/Wjj can be reconstructed and separated €

σE / E = 0.6 / E(GeV)

€

σE / E = 0.3/ E(GeV)

€

e+e− → νν WW ,νν ZZ

€

W /Z → jj

€

σE / E = 0.3/ E

(Important mode if no Higgs is found)

H.Yamamoto

Detector Concept Studies

■ SiD - America Silicon tracker, 5T field, ‘small’ SiW ECAL 2 leaders (Jaros, Weerts) + Asian, European contacts

■ Tesla-based - Europe, now called LDC TPC, 4T field, ‘medium’ SiW ECAL 6 ‘contact persons’ being selected (2 x 3regions)

■ ‘GLD’ - Asia TPC, 3T field, ‘large’ W/Scintillator ECAL 6 ‘contact persons’ being selected (2 x 3regions)

H.Yamamoto

■ Overall jet energy resolution σjet

2 = σch2 + σ

2 + σnh2 + σconfusion

2 + σthreashold2

Fine-grain ECAL and HCAL (digital?) 　

■ Increase ECAL radius (Rin) to separate clusters

Charged track separation B Rin2

Neutral separation Rin

H.Yamamoto

H.Yamamoto

‘GLD’ is smaller than CMS

H.Yamamoto

Basic parameters

SiD TESLA ‘GLD’

ECAL

Rin (m) 1.27 1.68 2.1

BRin2 8.1 11.3 13.2

Type W/Si W/Si W/ScintRm

eff (mm) 18 24.4 16.2

BRin2/Rm

eff 448 462 817

X0 21 24 27

E+H

CAL

5.5 5.2 6.0

t (m) 1.18 1.3 1.4

H.Yamamoto

Issues

■ Prove the concept with full simulation of actual jet reconstruction. Make the concept viable for LOI/Proposal

■ Moderate B field → larger rbeampipe Vertex resolution good enough?

■ Cost of ECAL ? Use scintillator (SiPM readout)

■ Will such TPC work? Endcap detector (large-scale GEM / MicroMEGAS) Long drift distance (diffusion?).

■ Solution for vertexing still doest not exist.

■ Large detector → support design.

H.Yamamoto

Current GLD Detector Efforts■ Simulation

KEK, Tohoku, Shinshu, Kobe

■ Calorimeters Tsukuba, Shinshu, Kobe, Niigata

■ TPC Saga, KEK, Tokyo NoKo, Kogakuin, Kinki etc.

■ Vertexing KEK, Niigata, Tohoku

■ DAQ Tsukuba, KEK

■ Support KEK

H.Yamamoto

Full Simulator (GEANT4)

■ Installation of ‘GLD’ into a full simulator “JUPITER” is under way.■ Still early stage (tracking, clustering, etc. etc.)■ Critical for establishing the detector concept.

H.Yamamoto

ECAL

Beamtest results :σ(E) = 16.3/√E3.6%

→Smaller tiles Sampling optimization

SiPM readout !

Shower max layerScintillator strip ECAL

Pb/Scint = 4mm/1mm4cmx4cm tile(5X5 tiles)x24 layersFiber readout

H.Yamamoto

SiPM

■ (42m)2 cell■ Limitted Geiger mode■ 1mm2 face■ Vbias~50 V■ 5 Tesla field OK■ QE~0.3■ Fast : σ~50 ps■ Cheap (~$1/piece?)

■ Noisy■ Quality control

H.Yamamoto

TPC Beamtest in B FieldEurope/Asia TPC collaboration (MPI, DESY, IPN Orsay + Asian institutions)

■ JACCEE SC Solenoid 1~1.2 Tesla Lage volume■ MPI TPC■ Study Diffusions etc.

Long drift is probably OK(?)

H.Yamamoto

GEM Test

xpadxtrack

Fuchigami GEM needs to be tested.

MicroMEGAS?

CERN GEM : Biconial hole

Fuchigami GEM : Straight hole(Chemical etching)

Pad response function(CERN GEM)

H.Yamamoto

Vertexing Detector

■ The long train (1ms) of cold machine: large occupancy - need to readout within a train. Various options pursued worldwide (CPCCD, FAPS, ISIS...)

■ Fine-Pixel CCD (FPCCD) proposed by Sugimoto. 5x5 m2 (usually 20x20 m2) Fully depleted to suppress diffusion → same occupancy as bef

ore/reading for whole train. Read out in train gap (no need to readout during train).

Needs an industrial partner. Multi-cell hits by bkg?

H.Yamamoto

H.Yamamoto

Summary and charges■ After ILC technology decision, concrete detector design efforts are now

starting worldwide - 3 main concepts.

■ We are pushing detector R&D efforts : around ‘GLD’ which is to be a global effort, with/within horizontal international collaborations

◆ TPC collaboration (LCTPC), Calorimeter (CALICE), etc.

■ Items particularly critical for GLD (Among many critical items) Low-cost and high performance ECAL Proof of concept by realistic simulations

◆ Jet energy resolution◆ Vertex resolution

■ ILC accelerator design needs inputs from physics/detector studies #IR, crossing angle, options, physics benchmarks ...