ILC Detector R&D Activities in Asia Akiya Miyamoto KEK CIAW07 November 5-7, IHEP, Beijing, China

ILC Detector R&D Activities in Asia

Akiya MiyamotoKEK

CIAW07November 5-7, IHEP, Beijing, China

Contents Introduction

– ILC Physics – Detector challenges– Detector Concepts

Detector R&D activities in Asia– Simulation Studies– Calorimeter– Main tracker– Vertex Detector– Pair Monitor

Summary

See presentations in the detector WG

5 November 2007 2CIAW07, Akiya Miyamoto

Opportunities at ILC Collisions of elementary particles High Energy and High Luminosity

Variable beam energy Polarized beam Very sensitive detectors Trigger free Precise theoretical calculation

Precise physics information in wide range of energy

LHC gives us new single global mixed picture.

ILC gives us new dynamic multi-dimensional total views.


ILC Physics Higgs study in all modes

4-jet 2-jet+missing 2 lepton+X

SUSY: Precise determination of masses and couplings

Cosmology and ILC:LSP masses and Dark matters

ILC

ACFA WG

Precision EW measurement: mt/mt ≤ 5x10-4


Challenges of ILC TrackersHiggs by recoil mass meas.

pT/pT2=2x10-5

H+-

4 layers: r=2.4~6cm,0.3X0/layer,

5 layers: r=1.2~6cm,0.15X0/layer,b/c tagging

Crucial for * Br(Hff), Q(jet) * Reduce combinatorial bkg.

in multi-jet events.

IP≈ 5

10/(psin3/2)m

IP≈ 5

25/(psin3/2)m


1/10 resol.1/10 resol.wrt. LHCwrt. LHC

1/10 resol.1/10 resol.wrt. LHCwrt. LHC

1/5 Rbp.1/5 Rbp.wrt. LHCwrt. LHC1/5 Rbp.1/5 Rbp.wrt. LHCwrt. LHC

Challenges of ILC Calorimeter

5 November 2007 CIAW07, Akiya Miyamoto 6

LEP det.

and e e WW ZZ

/ ~0.6E E 0.3

2 jetM

Study H to VV coupling at H.E.

ILC det.

Mh in jet mode

Factor 2 improvements in

Ejet/Ejet is equivalent of

40% gain in luminosity

Detectors for ILC

GLD + LDC ILD for LOI

Small cell Cal.Gaseous

Tracker3T

Small cell Cal.Silicon Tracking5T

SiDGLD

LDC

Small cell Cal.Gaseous

Tracker3T

4th

Dual-readout Cal.Gaseous Tracker3.5T(Dual Sol.)


Concepts - Technologies

85 November 2007 CIAW07, Akiya Miyamoto

Studies by Simulation Studies of performance of GLD,

based on Geant4 ROOT based framework, JSF, are

used for decelopments of detector simulator (Jupiter) and reconstruction codes(Satellites) .

– Kalman track fitter for studies of tracking performance

– Particle Flow studies– Studies of beam induced

backgrounds/effects to detector performance

GLD geometry in Jupiter

A typical e+e- ZH X eventsat Ecm=350GeV


Some results by simulation

( , , )Z qq u d s

GLD-PFA: Ejet/Ejet ~30%/ √E for Z-pole events Not good for high energy jets.

cos jet

Momentum resolution

Recently, we analyzed GLD Jupiter data byPandoraPFA and better resolution for high energy jets have been obtained. But parameter tuning ofanalysis code is not completed yet.

1x10-5


Calorimeter

PFA Calorimeter:– ECAL: Scintillator &W

1x5cm2, 33 layers, ~10M channels– HCAL: Scintillator & Fe(Pb)

1x20cm2 & 4x4cm2, 46 layers, ~6M channels

– Sensor inside 3T magnet

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

Photonics and many other companies.

– High Gain (~106), High Efficient(~60%)Low operating voltage(~60V), Good even in 5 Tesla, will be cheap. 11

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(Japan), Kyungpook(Korea), TIFR(India)


Multi Pixel Photon Counter 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

12

MPPC(HPK)

Each pixel operates as giger mode. # of hit pixcels = # of photons Dynamic range is limited by ~ # of pixels, ( ~ a few x 103 )

Single photon count


Tests of MPPC Calorimeter CALICE beam tests have been performed at DESY and CERN

– 2 types of scinti. strips by KNU(Korea) and 1 by Kuraray (Japan) with MPPC readout (~800 pcs)

Extruded/covered by TiO2

DESY beamtests

W(3.5mmt)Scinti.(3.5mmt)


Silicon Sensor for EM Calorimeter

• Fabricated on 380um 5’ high resistivity wafer

• 4 x 4 matrix ( a pixel: 1.55 x 1.37 cm2)

• A sensor size : 6.52 x 5.82 cm2 (including 3 guard rings )

• DC coupled

3 Guard Rings

60um

20umN-type silicon wafer of 5 ㏀

SiO2

p+

Al

Guard RingPixels(Signal)

380 ㎛

by Korean group


Beam Direction

Layers of Si sensorsand Tungstens

Frontend readout boards

Digitaland ControlBoards

Beam Test at CERN SPS H2 beam line

Data Run - electron 150,100,80,50,30,20,10 GeV - hadron 150 GeV - muon 150 GeV

Fit curve : 29%/√E

Further analysisin progress


Time Projection Chamber

Principle of TPC

16

Drift Time Z positionPosition at Pad plane

rposition

Challenges To achieve <150m after

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

R&D issues Gas amplification in MPGD :

GEM, MicroMegas Properties of chamber gas:

drift velocity, diffusion Ion feedback control

B

E


Gaseous Tracker

MPGD TPC: Basic Properties TPC with read out by Micro Pattern Gaseous Detector is

studied at KEK PS in 2004-2005

Tests by KEK 4GeV hadron beam

and 1.2T PCMAC

GEM Beam tests established a model ILC goal can be met.

Choice of a TPC gas, effects of space charge and non-uniform B fieldare yet to be studied.


LCTPC In order to demonstrate the full volume tracking with non

uniform magnetic field, beam tests by the best-at-present MPGD TPC candidates, achieving the expected resolution for LC TPC, are scheduled in 2008 using PCMAG

This is a joint work of LCTPC international collaboration : Member institutes in Asia Tsinghua (China), Hiroshima, KEK, Kiniki, Saga, Kogakuin, Tokyo UA&T, Tokyo, Tsukuba (Japan), Mindanao SU IIT(Philippine)

Field mapping of PCMAG at DESY

Endplate: 80cm

7 modules~10k readout channels

Pre proto-type pad plates


VTX

Silicon Tracker: by Korean GroupIT-Barrel

IT-Forward

>2 IT layers improveMomentum Resolution

Geant4 based simulation study

Si strip detectors and read out electronics are developedAC TRK1P+width:200umAl wdth:220um

AC TRK2P+width:300umAl wdth:320um

DC TRK1P+width:400umAl wdth:420um

DC TRK2P+width:600umAl wdth:620um

Poly-Si Resists

PIN diode

Test patterns

AC typePitch:500umChannel:64

DC typePitch:1000umChannel:32

Test patterns

Test patterns

AC1

AC2 DC2

DC1

Test patterns

5-inch process

Beamtest and radiation damage testwere carried out using 35~45 MeV beam at Korea Institute of Radiological and Medical Science


Vertex Detector R&D

ILC Vertex Detector consists of ~10 Giga pixels. Reading out signals of 2820 bunches in 1msec, ILC vertex detector has to achieve the impact parameter resolution, IP, 5 10/(psin3/2) m.

Many technologies are proposed/studied. GLD plan is– Fine Pixel CCD ( ~5x5m2pixels, fully depleted)– Accumulate 1msec signals and readout after pulse– Bkg. hit occupancy < 1% thanks to the small pixel size.– 3 super-layers, each consists of 2 layers = 6 layers in total

Vertex Detector sensor layout

Readout scheme

Z

R

KEK -Tohoku


R&D on FPCCD

21

Z

Z

R-

e-

Low Pt High Pt

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

Background hit rejection Is “fully depleted CCD” fully depleted ?

Now preparing a first proto-type FPCCD chip: pixel size 12x12m2, 512x512pixels, 4ch/chip


Pair MonitorMeasure hit pattern of pair background and monitor beam position/size

Tohoku

Count/Save hits every 1/16 trainNominal Y Y 5xNominal

From a hit pattern at pair monitor: Y~0.3nm 22

Z

R

Summary The ILC environment is benign by LHC standards,

and admits designs and technologies which have not been considered in the context of LHC detector R&D. However, it still poses fundamental challenges for many of the detector subsystems.

The R&D on detector technologies are actively pursued in Asian countries.

The studies for Letters Of Intent, especially on the optimization of detector parameters, has been kicked-off.

Next Asian regional meeting on ILC Physics and Detector , TILC08, is held in 3-6 March, 2008 at Sendai, Japan, jointly with GDE


Backup Slides

ILC Detector: GLD as an example 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

coil5 November 2007 25CIAW07, Akiya Miyamoto

Jet Measurements in ILC Detectors:PFA Particle reconstruction

26

Charged particles in TrackerPhotons in ECALNeutral hadrons in HCAL (and possibly ECAL)b/c ID: Vertex Detector

Large detector – spatially separate particles High B-field – separate charged/neutrals High granularity ECAL/HCAL – resolve particles

For good jet erngy resolution Separate energy deposits from different particles


Documents

ILC Detector R&D Activities in Asia Akiya Miyamoto KEK CIAW07 November 5-7, IHEP, Beijing, China