1 Status of GLC Physics and Detector Studies Akiya Miyamoto KEK, IPNS 20 February 2004.
ILC Detector R&D Activities in Asia Akiya Miyamoto KEK CIAW07 November 5-7, IHEP, Beijing, China.
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Transcript of 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.
5 November 2007 3CIAW07, Akiya Miyamoto
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
5 November 2007 4CIAW07, Akiya Miyamoto
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
5 November 2007 5CIAW07, Akiya Miyamoto
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.)
5 November 2007 7CIAW07, Akiya Miyamoto
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
5 November 2007 9CIAW07, Akiya Miyamoto
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
5 November 2007 10CIAW07, Akiya Miyamoto
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)
5 November 2007 CIAW07, Akiya Miyamoto
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
5 November 2007 CIAW07, Akiya Miyamoto
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)
5 November 2007 13CIAW07, Akiya Miyamoto
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
5 November 2007 14CIAW07, Akiya Miyamoto
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
5 November 2007 15CIAW07, Akiya Miyamoto
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
5 November 2007 CIAW07, Akiya Miyamoto
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.
5 November 2007 17CIAW07, Akiya Miyamoto
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
5 November 2007 18CIAW07, Akiya Miyamoto
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
5 November 2007 19CIAW07, Akiya Miyamoto
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
5 November 2007 20CIAW07, Akiya Miyamoto
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
5 November 2007 CIAW07, Akiya Miyamoto
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
5 November 2007 23CIAW07, Akiya Miyamoto
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
5 November 2007 CIAW07, Akiya Miyamoto