Post on 13-Jan-2016
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 ...