report from ilc detector working group tao hu institute of high energy physics
TRANSCRIPT
Report from ILC deReport from ILC detector working grotector working gro
upup Tao HuTao Hu
Institute of High Energy PhysicsInstitute of High Energy Physics
Talk listTalk list ILD – A Large Detector for ILCILD – A Large Detector for ILC
Yasuhiro SugimotoYasuhiro Sugimoto ( (KEKKEK)) ILC TPC R&D Status Yulan Li (TsinghuILC TPC R&D Status Yulan Li (Tsinghu
a)a) Calorimeter in ILC T. Takeshita (ShinshCalorimeter in ILC T. Takeshita (Shinsh
u)u) Software tools forSoftware tools for ILC StudiesILC Studies
Akiya Miyamoto (KEK) Akiya Miyamoto (KEK) Heavy Scintillating Glasses for Future High Energy PHeavy Scintillating Glasses for Future High Energy P
article Physics Experimentsarticle Physics ExperimentsChun Jiang (Jiao Tong)Chun Jiang (Jiao Tong)
Performance goal
Vertex Detector Impact param. res. : b = 5 10/(psin3/2) m
Charm and ID is important : c ~ 100 m >> b
Tracker pt/pt2 = 5x10-5 /GeV
Calorimeter Jet energy resolution : Ej/Ej = 30%/Ej1/2
Hermeticity Forward coverage down to ~5 mrad
or Ej/Ej = 3 - 4 %
Yasuhiro Sugimoto
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: Charged
particles by tracker, s by ECAL, and neutral hadrons by HCAL Larger BRCAL
2 is preferable to separate charged tracks in the calorimeter
Calorimeter should have fine granularity
Yasuhiro Sugimoto
Detector features
GLD LDC SiD 4-th
Tracker TPC + Si-strip TPC + Si-strip Si-strip TPC or DC
CalorimeterPFA
Rin=2.1m
PFA
Rin=1.6m
PFA
Rin=1.27m
Compensating
Rin=1.5m
B 3T 4T 5T3.5T
No return yoke
BRCAL2 13.2 Tm2 10.2 Tm2 8.1 Tm2 (non-PFA)
Estore 1.6 GJ 1.7 GJ 1.4 GJ2.7 GJ
Dual solenoid
SizeR=7.2m
|Z|=7.5m
R=6.0m
|Z|=5.6m
R=6.45m
|Z|=6.45m
R=5.5m
|Z|=6.4m
Yasuhiro Sugimoto
Integration of GLD/LDC into ILD ILC Detector Roadmap
Convergence of detector concepts from 4 to 2 by the end of next year in order to concentrate limited resources into engineering design 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
Yasuhiro Sugimoto
Expected performance
Impact parameter resolution
5065
100
15
80
CCD
R-Z View
Layer R (mm)
1 20
2 22
3 32
4 34
5 48
6 5080m Si-equivalent
per layer is assumed
GLD study
Performance goal achieved
Yasuhiro Sugimoto
Expected performance
Momentum resolutionGLD study SiD study
Performance goal achieved
Yasuhiro Sugimoto
Expected performance
PFA performance
E (GeV)
45 4.4 0.295
100 3.1 0.305
180 3.1 0.418
250 3.4 0.534
)//( EEE (%)/ EE
Jet-energy resolution study by M.Thomson for LDC00 (BR2=11.6 : Larger than latest LDC)
Performance goal almost achieved
Yasuhiro Sugimoto
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 set for the unified detector
Oct.1,2008: Submit LoI
Yasuhiro Sugimoto
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 defining the optimized parameters of the ILD
At present, we don’t have sub-groups for sub-detectors specific to ILD (contrasting to SiD)
Information of sub-detectors will be obtained from existing horizontal 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)
Yasuhiro Sugimoto
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
2 sint t tp p a b p
Requirements from ILC• LCTPC has to provide good momentum resolution
– Precise model independent Higgs mass measurement:
– Local position resolution requirements for TPC–GLD: 150 m; LDC: 100 m
Yulan LiYulan Li
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
•GEM
–Advantage•By using multiple GEMs
– Good ion feedback suppression
– Low discharge probability–Disadvantages
•Flatness problem, gain fluctuation
•Solid support structure needed
TPC readout Technologies (Cont.)• Micromegas
–Disadvantages• The narrowness of the sign
al (“standard”)• High discharge probability
–Advantages• Intrinsically flat (pillows)• No large support structure n
eeded
• Difference: Micromegas produce narrower signal than GEM
• Bottom line: both seem feasible, both still need more R&D
Yulan LiYulan Li
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
TPC readout Technologies (Cont.)
Tsinghua TU-TPC
Yulan LiYulan Li
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
Tsinghua
Yulan LiYulan Li
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
Yulan LiYulan Li
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
Phase 1 R&DGEM feasible
Phase 1 R&DGEM feasible
Yulan LiYulan Li
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
Phase 1 R&DMicromegas with resisitive anode feasible
Phase 1 R&DMicromegas with resisitive anode feasible
Yulan LiYulan Li
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
Phase 1 R&DPixel “proof of principle”
Phase 1 R&DPixel “proof of principle”
• Reconstruct a track electron by electron (or cluster by cluster)
• ASIC: MediPix2, 55 x 55 m2
• Small residua: 50-60 m
GEM+Pixel
Yulan LiYulan Li
CCAST ILC Workshop
Nov. 5-7, 2007, IHEP, Beijing, China.
LCTPC milestonesLCTPC milestones
2006-2010 Continue LCTPC R&D via small-prototypes
and LP test
2011 Decide on all parameters
2012 Final design of the LCTPC
2016 Four years construction
2017-18 Commission/Install TPC in the ILC Detector
2006-2010 Continue LCTPC R&D via small-prototypes
and LP test
2011 Decide on all parameters
2012 Final design of the LCTPC
2016 Four years construction
2017-18 Commission/Install TPC in the ILC Detector
Yulan LiYulan Li
T. TakeshiT. Takeshitata
T. TakeshiT. Takeshitata
6 November 2007 CIAW07, Akiya Miyamoto
Jet Measurements in ILC Det.
Particle reconstruction Charged particles in tracking DetectorPhotons in the ECALNeutral hadrons in the 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 erg resolution Separate energy deposits from different particles
6 November 2007 24CIAW07, Akiya Miyamoto
T. TakeshiT. Takeshitata
T. TakeshiT. Takeshitata
T. TakeshiT. Takeshitata
T. TakeshiT. Takeshitata
T. TakeshiT. Takeshitata
T. TakeshiT. Takeshitata
T. TakeshiT. Takeshitata
Our Proposal
To replace the structure of metal and plastic scintilaltor plates by scintillating glass blocks that glued together to form homogeneous modules. It will be - A total absorption calorimeter for optimum resolution
- Can combine the functions of EM and Hadron Colorimeters
A total absorption hadron calorimeter can have excellent energy resolution because it provide several ways to measure energies required to break up nuclei, which is mostly “invisible” in a sampling hadron calorimeter since such energy is mostly absorbed by the inactive metal plates.
Chun JiaChun Jiangng
Two OptionsOption 1:A conventional scintillation calorimeter that reads the scintillation light only
Hadron energy that is invisible in a sampling calorimeter can be recovered by observing ionization energies from heavy nuclei fragments, spallation protons, ’s released by fast neutron inelastic scatterings and recoiling nuclei due to fast neutron elastic scatterings, and energies released by thermalized neutrons captured by the calorimeter media
Option 2:A dual readout calorimeter that reads the scintillation light and cherenkov light separately. Compensation for the invisible energy can be achieved by this method.
See the reference
http://ilcagenda.linearcollider.org/contributionDisplay.py?contribId=202&session
Id=45&confId=1556
Chun JiaChun Jiangng
B2O3-SiO2-Gd2O3-BaO 30:25:30:15
doped with Ce2O3 or other dopantsChun Jiang, QingJi Zeng, Fuxi Gan,Scintillation luminescence of cerium-doped borosil
icate glass containing rare-earth oxide, Proceedings of SPIE, Volume 4141, November 2000, pp. 316-323
• Density 5.4 g/cm3 is sufficient for an ILC calorimeter
• Contains a large amount of thermal neutron isotopes
boron and gadolinium
• Will capture thermalized neutrons in a short time and in close proximity to hadron showers providing a mean for recovering invisible energies in hadron showers
Our Proposed BSGB Scintillating GlassChun JiaChun Jiangng
BSGB Glass
Density 5 - 5.5 g/cm3
Light yield ~500 ’s/MeV (?)
Decay time 60 - 80 ns
Scintillation wavelength 460 nm
Radiation length 1.8 cm
Interaction length 20 - 25 cm (estimate)
Some Properties of the BSGB Glass
Chun JiaChun Jiangng
36
BSGB Glass
Scintillation Light Yield (80 keV X-ray excitation)
Chun JiaChun Jiangng
6 November 2007 CIAW07, Akiya Miyamoto
ROOT objects : Event Tree & Configuration
Our software tools
BeamtestAnalysis
EventReconstruction
Digitizer Finder Fitter
DetectorSimulator QuickSim FullSim
EventGenerator
Pythia CAIN StdHep
PhysicsAnalysis
Jet finder
Link to various tools at http://acfahep.kek.jp/subg/sim/soft GLD Software at http://ilcphys.kek.jp/soft All packages are kept in the CVS. Accessible from http://jlccvs.kek.jp/
6 November 2007 37CIAW07, Akiya Miyamoto
6 November 2007 CIAW07, Akiya Miyamoto
Description Detector Language IO-Format Region
Simdet Fast Monte Carlo TeslaTDR Fortran Stdhep/LCIO EU
SGV Fast Monte Carlo flexible C++ None(LCIO) EU
Lelaps Fast Monte Carlo SiD, flexible C++ SIO, LCIO US
QuickSim Fast Monte Carlo GLD Fortran ROOT Asia
Brahms-Sim Full sim. - Geant3 TeslaTDR C++ ASCII, LCIO EU
Mokka Full sim. – Geant4 TeslaTDR, LDC C++ LCIO EU
SLIC Full sim. – Geant4 SiD C++ LCIO US
ILC-ROOT Full sim. – Geant4 4th C++ ROOT US+EU
Jupiter Full sim. – Geant4 GLD C++ ROOT, LCIO Asia
Brahms-Reco
Reconstruction framework TeslaTDR Fortran LCIO EU
Marlin Reconstruction Analysis framework
Flexible,LDC C++ LCIO EU
Org-lcsim Reconstruction packages SiD(flexible) Java LCIO US
Satellites Reconstruction packages GLD C++ ROOT Asia
LCCD Conditions data toolkit LDC, SiD, .. C++ MySQL, LCIO EU
GEAR Geometry Description Flexible C++ XML EU
LCIO Persistency/Data model All C++,Java,Fortran
- EU,US,Asia
JAS3/WIRED Analysis tool/Event display LDC, SiD … Java XML,LCIO,stdhep, heprep,
US, EU
JSF Analysis framework All C++ ROOT/LCIO Asia
Software tools in the world
6 November 2007 38CIAW07, Akiya Miyamoto
6 November 2007 CIAW07, Akiya Miyamoto
Jupiter/Satellites for Full Simulation Studies
JUPITERJLC Unified
Particle Interactionand
Tracking EmulatoR
IOInput/Outputmodule set
URANUS
LEDA
Monte-Carlo Exact hits ToIntermediate Simulated output
Unified Reconstructionand
ANalysis Utility Set
Library Extension for
Data Analysis
METISSatellites
Geant4 basedSimulator
JSF/ROOT basedFramework
JSF: the analysis flow controller based on ROOT The release includes event generators, Quick Simulator, and simple event display
MC truth generator Event Reconstruction
Tools for simulation Tools For real data
6 November 2007 39CIAW07, Akiya Miyamoto
6 November 2007 CIAW07, Akiya Miyamoto
GLD Geometry in Jupiter
FCAL
BCAL
IT
VTX
CH2mask1 module
Include 10cm air gap as a readout space
6 November 2007 40CIAW07, Akiya Miyamoto
6 November 2007 CIAW07, Akiya Miyamoto
GLD PFA Performances( ) 91.2 for Z qq light quark only at s GeV
~ 30% / | cos | 0.9f orE
Using 1x1cm2 calorimeter cell size
Ejet/Ejet is uniform except very forwarddoes not change significantly for ECAL cell size of 1x5cm2
is worse for higher energy jets
6 November 2007 41CIAW07, Akiya Miyamoto
LDC00
PandoraPFA A detailed and highly tuned algorithm
– Topology based cluster merging– Identify photons, merged tracks,
backscatters, MIP segments – Perform iterative re-clustering as
needed, using track momentum
Won’t merge
Won’t merge
Could getmerged
30 GeV12 GeV
18 GeV
10 GeV Track
6 November 2007 43CIAW07, Akiya Miyamoto
Detector OptimizationZuds pair events are used for detector optimization
PandoraPFA: B dep. for 100 GeV jets
SiD like
LDC like
GLD like
PandoraPFA: ECAL segmentation
GLD PFA: Dep. on ECAL Rin
Larger ECAL Rin performs better ( R is slightly more important than BR2 rule) Further studies on physics channels are awaited.
6 November 2007 44CIAW07, Akiya Miyamoto
6 November 2007 CIAW07, Akiya Miyamoto
Physics performanceStudies of physics performances by full simulations have been started.
Preliminary result by GLD-PFA, including ISR/BS, and b-tag. mH offset and wide (mH) are seen. Study is in progress to improve them.
/e e ZZ ZH bb
2
350 ,
120 /H
s GeV
m GeV c
GLD Cheated PFA Analysis
, ISR, undetected particles, and Edouble count are main contributor to (mH). After correct them, it is same as Z0 case
6 November 2007 45CIAW07, Akiya Miyamoto
6 November 2007 CIAW07, Akiya Miyamoto
Physics Performance -2 , ,e e ZH Z qq H bb 500 , 120Hs GeV m GeV
6 November 2007 46CIAW07, Akiya Miyamoto
SummarySummary GLD and LDC spontaneously merged into ILD and will write GLD and LDC spontaneously merged into ILD and will write
a common LOIa common LOI More detail on TPC and CMore detail on TPC and Calorimeter alorimeter R&DR&D A total absorption E/H calorimeter with heavy scintillating A total absorption E/H calorimeter with heavy scintillating
glasses proposedglasses proposed Software tools based on ROOT and Geant4 have been develoSoftware tools based on ROOT and Geant4 have been develo
ped and extensively used for GLD studiesped and extensively used for GLD studies