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GLD and related R&D activities in Japan

Akiya MiyamotoKEK

23-Nov-2006Tsinghua University

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Contents

Performance goals of ILC detector GLD concepts and expected performance Detector technology studies

Vertex detector TPC Calorimeter

DCR

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Physics Scenario at ILC

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Vertexing ~1/5 rbeampipe,~1/30 pixel size (wrt LHC)

Tracking ~1/6 material, ~1/10 resolution (wrt LHC)

Jet energy (Higgs self-coupling, W/Z sep. in SUSY study) ~1/2 resolution (wrt LHC)

3/ 25 10 / sinip m m p

5(1/ ) 5 10 / GeVp

/ 0.3 / ( )GeVE E E

(http://blueox.uoregon.edu/~lc/randd.pdf)

(h bb ,cc , )

(ee Zh X; incl. h nothing)

Or better

ILC Detector Performance Goals

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e+e- WW/ZZMain processes to study if Higgs sector is strongly interacting

WW ZZ

(@1TeV, fb) 17.2 6.5

No. of jet events (1ab-1) 7948 3165

Distribution: Sum of BreitWigner and Gauss of Gauss is /sqrt(E)No. of Events=xLxBr(W/Zqq’)

30% / E

M1qq(GeV) M1qq(GeV)

M2qq(G

eV

)

M2qq(G

eV

)

60% / E

Projectionto M1=M2

Hard to separateW/Z

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e+e- ZHH at 500 GeV

Main channel to study Higgs self-couplingTotal cross section ~ 0.2fb @ 500 GeV

2 2 212 34 56( ) ( ) ( )h h ZDIST M M M M M M

30% / E 60% / E

By Yasui

Analysis by TESLA DIST is used to separate signal from backgroundJet energy resolution is crucial to see signal

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Higgs study in lepton mode

Higgs mass measurement by Z recoil method Model independent Higgs search mh~50MeV, ~3% possible in SM

Mh is very sensitive to loop effect in SUSY models: Lesser effects of beam related background Needs excellent tracker performance

1 22 42

~ ln( )t th t

t

m mm G m

m

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GLD Concept

Large ECAL inner radius for optimal PFA,readout by Scintillator + SiPM/MPPC for cost efficiency

Large gaseous main tracker + several layers of IT + VTX Moderate B Field (3T)

TPC

ECAL HCALCoil

Muon

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Comparison to other concepts

SiD LDC GLD

Silicon CTEM: W/Si5Tesla

TPC CTEM: W/Si4Tesla

TPC CTEM: W/Scintillator3Tesla

GLD: Large ECAL radius good for better jet energy resolution

GLD GLD features

1. Moderate B field (3T), All detector except Muon, inside a coil

2. Large inner radius of ECAL(~2m) to optimize for PFA. Absorber: W(ECAL), Iron (HCAL) Fine-segmented scintillator read out by MPPC

3. Gaseous tracker: TPC with MPGD readout Excellent pt/pt

2 and pattern recoginition

Vertex and Intermediate Tracker

TPC

coil

GLD organizationMember :16 countries, 77 Univ./Inst. 224 members

Contact Persons H.Yamamoto, H.B.Park (Asia), G.Wilson(NA) R.Settles, M.Thomson(EU)

UK 5Germany 3Italy 2Netherlands 1Rusia 1

Japan 28 Philipine 2Korea 8 Australia 2China 5 India 4Singapole 1 Vietnum 1

USA 11Canada 1

# inst.

Executive boardS.Yamashita - BenchmarkA.Miyamoto - SoftwareY.Sugimoto - Vertex DetectorH.J.Kim - Intermediate TrackerA.Sugiyama/R.Settles – TPCT.Takeshita - Calorimeter/MuonT.Tauchi - Interaction RegionH.Yamaoka - Coil & StructureP.Ledu - DAQM.Tomson - Space

GLD Concepts has been developed through E-mails and TV meetings discussion http://ilcphys.kek.jp/gld lcddds@ilcphys.kek.jp

GLD DOD: physics/0607154

Task forces (since March 2006) IR (T.Tauchi ) PFA (T.Yoshioka) Tracking ( to be decided)

ILC crossing angle, Detector hall, push/pull options, etc are hot topics in recent meetings

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Geant4 simulation of GLD

Geometry implemented in Jupiter

1 module

ECAL: 33 layers of 3mmt W/2mmt Scint./1mmt Gap HCAL: 46 layers of20mmt Fe/5mmt Scint./1mmt Gap

CAL readout cell 2cmx2cm (Default) 1cmx1cm ( studied in parallel ) Strip shape: 1cmx5cm

10cm air gap as a readout space

Typical Event Display

- ZH → h : Two jets from Higgs can be seen.

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Tracking

Momentum resolution: based on cheated PFA ( GLD DOD )

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4

/

4 10 ( / )

8 10

t t

t

p p

p GeV c

Track finders are yet to be developed !

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A typical CAL. performance

by Y.Kawakami and H.Ono

Ener

gy R

esol

utio

n(E

/E)

GammaK0L

1/ ( )E GeV 1/ ( )E GeV2 2 2(0.159 / ) (0.009) )( /E E E 2 2 2(0.525/ ) (0.050) )( /E E E

Performances have to verified/confirmed by beam tests in coming years

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e+

e-

Realistic PFA Critical part to complete detector design

Large R & medium granularity vs small R & fine granularity Large R & medium B vs small R & high B Importance of HD Cal resolution vs granuality …

Algorithm developed in GLD: Consists of several steps Small-clustering Gamma Finding Cluster-track matching Neutral hadron clustering

Red : pionYellow :gammaBlue : neutron

- Performance in the EndCap region is remarkably improved recently.- Almost no angular dependence : 31%/√E for |cos|<0.9.

All angle

- Z → uds @ 91.2GeV, tile calorimeter, 2cm x 2cm tile size

Jet Energy Resolution (Z-pole)

T.Yoshioka (Tokyo)

Jet Energy Resolution

- Jet energy resolution linearly degrades. (Fitting region : |cos|<0.9)

- Energy dependence of jet energy resolution.

T.Yoshioka (Tokyo)

Next step is Optimization of detector configuration Using physics process, such as ZH, TT, etc,

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Concepts - Technologies

JSPS Creative Scientific Research

Just started (2006) 400M\ in 5 years + 6 Post.Doc. Positions Research Items:

Develop key technologies for the ILC detectors Detector optimization and develop GRID as an ILC computing infra.

Research and Development of a Novel Detector System for the International Linear Collider

Coordinated by : Hitoshi Yamamoto (Tohoku Univ.)http://www.awa.tohoku.ac.jp/ilcsousei/indexe.html

Optimization

Vertex Detection Tracker

MPGD MPPCFPCCD

Develop state-of-the-art new sensors

Calorimeter

GRID

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VTX R&D in Japan

Challenge of ILC Vertex detector To achieve performance goal, vertex detector has to

Thin(< 100mt si/layer) pixel device, pt < 5m, # layer > 3 Bunch spacing, ~300nsec, is too short to readout O(1) Giga pixels,

but occupancy is too high if accumulate 3000 bunches of data with a standard pixel size of ~ 20x20m2.

No proven technology exist yet. Candidates are, Readout during train

CPCCD, MAPS, DEPFET, … Local signal storage, and readout between train

ISIS, CAP, FAPS, … Fine Pixel, readout between train

FPCCD (5x5m2 pixel CCD) In Japan, we (KEK-Tohoku-Niigata collaboration) are proposing Vertex Detector us

ing Fine Pixel CCD (FPCCD) We believe FPCCD is the most feasible option among the proposed technologies

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FPCCD Vertex Detector

Baseline design for GLD

2 layers Super Layer, 3 super layers in totalminimize the wrong-tracking probability due to multiple scattering

6 layers for self-tracking capability Cluster shape analysis can help background rejection

Z

Z

R-

e-

Low Pt High Pt

1/10~1/20 noise hits reduction expected from simulation

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FPCCD Chip

5m pixels, to reduce occupancy Promising, because Fine pixel CCD device exists already for optical applicatio

ns Fully depleted epitaxial layer to suppress charge spread by diffusion Multi-port readout with moderate (~ 15MHz) readout Low temperature operation to keep dark current negligible for 200msec re

adout cycle.

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Challenge of TPC technology

Principle of TPC

Pad Plane

.. .......

Bz

E

CentralMembrane

Drift Time Z positionPosition at Pad plane

rposition

Challenges To achieve r<150m after long drift

of > 2m MWPC (large ExB not good) MPGD readout

R&D issues Gas amplification in MPGD : GEM, Mi

croMegas Properties of chamber gas:

drift velocity, diffusion Ion feedback control

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KEK PI2 beamline

Beam

Saga-Hiroshima-Kinki-Kougakuin-TUAT-KEK+MSUIIT+MPI+CEA/CNRS+Carleton

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Beam test result: example

Better understanding of resoltion vs drift length, B field, pad size, GEM/Micromegas, etc. obtained.

0T

1T

Plan of coming years Studies of MPGD, Gas properties, etc by Large Prototype together with LCTPC

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Calorimeter

Finely segmented sandwich calorimeter Active material: Scintillator Huge number of channel:

EM-CAL(10M), HD-CAL(6M) Sensor inside 3T magnet

Photon sensor: Multi-Pixel Photon Counter Under development by Hamamatsu Photonic

s and many other companies. High Gain (~106), High Efficient(~60%)

Low operating voltage(~60V), Good even in 5 Tesla, will be cheap.

Limited dynamic range, noise ?

CAL. With MPPC readout will be tested soon at DESY/FNAL

EM-Scintillator-layer model

TT 8June05

particles

T-Layer

X-Layer

Z-Layer

4cmx4cmx2mm

1cmx20cmx2mm

1cmx20cmx2mm

MPC R/O with WLSF

MPC R/O with WLSF

MPC R/O with WLSF

absorber plate

GLC-CAL super layer

x 13 super layers

Kobe-Shinshu-Niigata-Tsukuba-Tokyo

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Photon Sensor R&D

Merits of Silicon Photon Pixel Counter Work in Magnetic Field Very compact and can directly mount on the

fiber High gain (~106) with a low bias voltage

(25~80V) Photon counting capability

O(1k) pixels,Each pixel is inGeiger mode.# hit pixel = # input lights

Front View of sensor

4 mm

3

mm

~1.3mmt

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Detector DCR

Companion document to GDE’s Reference Design Report (RDR) which outlines baseline and costs for the ILC machine.

DCR has three pieces: Physics (50p)+Detector(150p)+Executive Summary

DODs (Detector Outline Documents) provide much of the material for the Detector DCR

WWS-OC oversees writing the DCR Overall Editorial Board

Brau, Richard, Yamamoto Physics Case for ILC Editors

J. Lykken, M. Oreglia, K. Moenig, A. Djouadi, S. Yamashita, Y. Okada ILC Detectors and Costs Editors A. Miyamoto, T. Behnke, J. Jaros, C. Damerell

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More about DCR

The RDR and DCR are due at the end of 2006

The DCR must make a compelling case for ILC physics and detectors

The Detector DCR will make the case that detectors can do the ILC physics show that detector designs are within reach note that advances in detector technology are needed show the progress on detector R&D ballpark detector cost argue for 2 detectors

Spirit of the DCR cooperative among concepts, not a vs b vs c vs d vs… supported by the international ILC detector community

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The Outline of the DCR

1. General Introduction2. Challenges for Detector Design and Technology3. Introduction to the Detector Concepts4. MDI Issues5. Subsystem Designs and Technologies6. Sub-Detector Performance7. Integrated Physics Performance8. Why We need 2 Detectors9. Detector Costs10.Future Options 11.Next Step12.Conclusion

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Detector DCR Wiki

http://www.linearcollider.org/wiki/doku.php?id=dcrdet:dcrdet_home

Rough Drafts Available Now!(thanks Ties)

Caveat: Drafts are evolvingrapidly. It’s too early for comments.

J.Jaros, Valencia 2006