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ILD – A Large Detectorfor ILC

Nov. 6, 2007Yasuhiro Sugimoto

KEK

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Contents

ILC detectors Integration of GLD/LDC into ILD ILD study activity Summary

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Requirements for ILC detectors

ILC detectors shouldidentify and measure

4-momenta ofbclZW ,,,,, !

Benchmark processes

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Performance goal Vertex Detector

Impact param. res. : σb = 5 ⊕ 10/(pβsin3/2θ) µm Charm and τ ID is important : cτ ~ 100 µm >> σb

Tracker δpt/pt2 = 5x10-5 /GeV

Calorimeter Jet energy resolution : σEj/Ej = 30%/Ej1/2

Hermeticity Forward coverage down to ~5 mrad

or σEj/Ej = 3 - 4 %

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Detector concepts for ILC Four Detector Concepts: GLD, LDC, SiD, 4th Three of them (GLD, LDC, SiD) are optimized for “PFA”

Measure energy of each particle in a jet separately: Chargedparticles by tracker, γs by ECAL, and neutral hadrons by HCAL Larger BRCAL2 is preferable to separate charged tracks in the

calorimeter Calorimeter should have fine granularity

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Detector features

(non-PFA)8.1 Tm210.2 Tm213.2 Tm2BRCAL2

2.7 GJDual solenoid

1.4 GJ1.7 GJ1.6 GJEstore

R=5.5m|Z|=6.4m

R=6.45m|Z|=6.45m

R=6.0m|Z|=5.6m

R=7.2m|Z|=7.5m

Size

3.5TNo return yoke

5T4T3TB

CompensatingRin=1.5m

PFARin=1.27m

PFARin=1.6m

PFARin=2.1m

Calorimeter

TPC or DCSi-stripTPC + Si-stripTPC + Si-stripTracker

4-thSiDLDCGLD

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Integration of GLD/LDC into ILD ILC Detector Roadmap

Convergence of detector concepts from 4 to 2 by the end of nextyear in order to concentrate limited resources into engineeringdesign activities Oct. 2007: LOI call by ILCSC Oct. 2008: LOI submission End of 2008: Two detectors for EDR are defined by IDAG

By July 2010: Two Detector Engineering Design Reports (EDR) GLD and LDC have similar concept

Calorimeter optimized for PFA TPC as the central tracker for excellent pattern recognition

GLD and LDC agreed to write a single common LOI Study for the common design (ILD) has started

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Short history of ILD Feb.2007: At ACFA WS at Beijing, serious discussion on the ILC detector

roadmap has started Feb.26.2007: A letter was sent from ILCSC to WWS co-chairs requiring to

draw a roadmap to produce two detector EDRs by 2010 keepingpace with the accelerator schedule

Mar.2007~: Detector roadmap working group is formed and several phonemeetings have been held

Apr.2007: Proposal of the “LOI process” to the roadmap W.G. Apr.27.2007: The 1st joint meeting of GLD-LDC contact persons May 29.2007: GLD-LDC joint meeting at LCWS2007 and agreement on the

joint effort towards a common LOI Jul.2007: GLD/LDC joint steering board (JSB) members are selected Aug.22.2007: The 1st JSB meeting and agreement on organizing working

groups Sep.13.2007: The name of the detector is decided as “ILD” (until formation of

real collaboration) at the 3rd JSB meeting Oct.2007: ILD meeting at ALCPG2007

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Long history of GLD/LDC GLD

1992: “JLC-I report” 2T solenoid Jet chamber Non-PFA CAL

1998~: ACFA Workshop onphysics/detector at LC (1st at Beijing)

2001: “Particle Physics Experimentsat JLC” 3T solenoid Smaller RCAL (1.6m)

2003: Internationalization of JLC JLC GLC

2004: ITRP decision (Warm Cold) PFA CAL Large RCAL (2.1m) TPC GLC detector GLD

2006: Detector Outline Document

LDC 1998~: ECFA study on physics and

detectors for LC 2001: TESLA TDR

4T solenoid TPC RCAL=1.68m

2004: ITRP decision TESLA detector LDC

2006: Detector Outline Document

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GLD baseline design0.05

4.5 7.5

0.40.6

2.3 2.8 4.2

0.45

2.0

2.1

3.5

4.0

4.5

7.2

Main Tracker

EM Calorimeter

Hadron Calorimeter

Cryostat

Iron Yoke

Muon Detector

Endcap Tracker

2.5

(VTX and SIT not shown)

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LDC baseline design

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GLD/LDC baseline design

Si endcap/external trk.Si endcap/outer trk. (option)Additional trk.

(10cm+4cm) x 10 + 1m(25cm + 5cm) x 9/10Iron yoke

4T3TSolenoidSci strip/PST/RPCScintillator stripMuon det.

W-Si/DiamondW-Si/DiamondForward CAL

Fe-Sci./RPC*/GEM*Fe(Pb)-ScintillatorHCALW-SiW-ScintillatorEM CAL

TPCTPCMain trk.Si strip/pixel (?)Si strip/pixel (?)Si forward trk.Si strip (2-layers)Si strip (4-layers)Si inner tracker

CPCCD/CMOS/DEPFET/ISIS/SOI/…FP CCDVertex det.LDCGLDSub-detector

* Digital HCAL

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Expected performance Impact parameter resolution

50

65

100

15

80

CCD

R-Z View

506

485

344

323

222

201

R (mm)Layer

80µm Si-equivalentper layer is assumed

GLD study

Performance goal achieved

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Expected performance Momentum resolution

GLD study SiD study

Performance goal achieved

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Expected performance PFA performance

0.5343.42500.4183.11800.3053.11000.2954.445

E (GeV) )//( EEE

!"! =(%)/ EE!

Jet-energy resolution study by M.Thomson for LDC00 (BR2=11.6 : Larger than latest LDC)

Performance goal almost achieved

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ILD study activity

Mandate To write a Letter of Intent (LoI) to produce a

detector Engineering Design Report (EDR) Milestones

May 2008: Define the baseline parameter setfor the unified detector

Oct.1,2008: Submit LoI

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Letter of Intent LOI will include

Detector design convincing of feasibility R&D plan for technologies which are not established Demonstration of physics performance Reliable cost estimation Description of the organization capable of making the

engineering design Participating institutes Commitment of major labs

LOI will NOT include Final technology choice for sub-detectors Several

options will be preserved

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ILD organization Joint steering board members selected in July 2008

T.Behnke, D.Karlen, Y.Sugimoto, H.Videau, G.Wilson,H.Yamamoto

Our effort is now focused on unification of GLD/LDC and definingthe optimized parameters of the ILD

At present, we don’t have sub-groups for sub-detectors specificto ILD (contrasting to SiD)

Information of sub-detectors will be obtained from existinghorizontal collaborations (LC-TPC, CALICE, SiLC, etc.)

For the design of ILD, three working groups are organized Detector optimization W.G. (M.Thomson, T.Yoshioka) MDI/Integration W.G. (K.Busser, T.Tauchi) Cost W.G. (A.Maki, H.Videau)

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Charge of W.G.s Detector Optimization

Investigate the dependence of thephysics performance of the ILDdetector on basic parameters such asTPC radius and B-field. On the basis ofthese studies and the understanding ofany differences observed the WG willmake recommendations for the optimalchoice of parameters for the ILDdetector

MDI/Integration The MDI/working group is charged to

produce a self-consistent design of thestructure of the ILD detector from theviewpoint of machine-detectorinterface (MDI) and detectorintegration for the LOI that is to besubmitted by October 1, 2008.Specifically, it covers the design of thebeam pipes, magnets, iron return yoke,beam instrumentations, and theirsupports that require works by thedetector group. Also, it should addressgeneral detector structure andassembly issues, where the aspectsthat affect the machine design willhave initial priority. Beam backgroundstudies should be performed whennecessary. The group should workclosely with the machine people andthe groups working on subdetectorsthat affect the structure of the ILDdetector.

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Optimization procedure Estimate physics performance for selected benchmark processes as

a function of detector parameters At first, we define the mesh-points in multi-dimensional phase space

of parameters: i.e., GLD, GLD’, LDC’, LDC, and simulation studywill be done at these mesh-points

VertexSolenoidEndcap ECALBarrel HCAL

Barrel ECAL

TPCSub-detector

Sci/FeSci/FeSci/FeSci/FeMaterial2.32.552.552.8Zmin (m)

16181820Rin (mm)43.53.53.0B field (T)

Si/WSi/WSci/WSci/WMaterial1.61.821.852.1Rin (m)2.162.352.352.5Zmax (m)1.581.81.82.0Rout (m)0.30.30.450.45Rin (m)LDCLDC’GLD’GLDParameter

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Next step Once the common parameters are determined in May 2008,

more benchmark processes should be studied to demonstratethe performance of ILD

Guideline of benchmark processes will be shown by ResearchDirector (concept groups can give him inputs)

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Engineering challenge of GLD Optimization W.G. does not discuss about “real world” A lot of realistic engineering issues will be studied/discussed in the

MDI/Integration W.G., such as How to support sub-detectors How to integrate sub-detectors into a detector system Surface assembly scheme (CMS style?) Detector alignment Power consumption and cooling method Amount of cables and pipes coming out from the detector Location and size of electronics-hut Design of back-end electronics and DAQ system Design of detector solenoid with anti-DID (Detector Integrated

Dipole) and flux-return yoke How to open and maintain the detector How to make it compatible with the push-pull scheme … …

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How to join ILD Join Working Groups

Mailing list subscription from https://lists.desy.de/sympa/info/ild-detector-optimisation/ https://lists.desy.de/sympa/info/ild-detector-mdi/

Join working group meetings http://ilcagenda.linearcollider.org/categoryDisplay.py?categI

d=129

Join sub-detector R&D relevant to ILD https://wiki.lepp.cornell.edu/ilc/bin/view/Public/WWS/

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ILD calendar Now Working group phone meetings Jan. 2008 ILD meeting in Europe Mar. 2008 ILD meeting associated with ACFA

workshop in Sendai (TILC08) May. 2008 Define the baseline parameter Jun. 2008 ILD meeting at ECFA workshop in

Warsaw Aug.-Sep. 2008 Shall we have ILD meeting in Asia? Oct 2008 LoI submission

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Future prospect beyond LOI EDR

Feature of detector EDR in 2010 Used as a proposal of the ILC project to governments together

with accelerator EDR Not a construction-ready design report The design described in the EDR could be changed depending on

the outputs from LHC and/or detector R&D after 2010 Construction-ready EDR (or TDR) will supposedly be made in

2012-2013(?) Resource

It requires a sizable resource to make an EDR We have to make all efforts to get the resource

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Summary ICFA/ILCSC called for LOI to be submitted by Oct.2008 Two detector concepts will write EDRs by 2010 GLD and LDC spontaneously merged into ILD and will write a

common LOI There are so many issues to be studied towards LOI and EDR

Optimization study for the common detector parameters Simulation studies to demonstrate ILD performance Engineering studies for MDI/detector integration Sub-detector R&D

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