Report from ILC detector working group Tao Hu Institute of High Energy Physics

Talk list ILD – A Large Detector for ILC ILD – A Large Detector for ILC Yasuhiro Sugimoto (KEK) ILC TPC R&D Status Yulan Li (Tsinghua) ILC TPC R&D Status Yulan Li (Tsinghua) Calorimeter in ILC T. Takeshita (Shinshu) Calorimeter in ILC T. Takeshita (Shinshu) Software tools for ILC Studies Akiya Miyamoto (KEK) Software tools for ILC Studies Akiya Miyamoto (KEK) Heavy Scintillating Glasses for Future High Energy Particle Physics Experiments Heavy Scintillating Glasses for Future High Energy Particle Physics Experiments Chun Jiang (Jiao Tong)

Performance goal Vertex Detector Impact param. res. :  b = 5  10/(p  sin 3/2  )  m Charm and  ID is important : c  ~ 100  m >>  b Tracker  p t /p t 2 = 5x10 -5 /GeV Calorimeter Jet energy resolution :  Ej /E j = 30%/E j 1/2 Hermeticity Forward coverage down to ~5 mrad or  Ej /E j = % Yasuhiro Sugimoto

Detector concepts for ILC Four Detector Concepts: GLD, LDC, SiD, 4 th 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 BR CAL 2 is preferable to separate charged tracks in the calorimeter Calorimeter should have fine granularity Yasuhiro Sugimoto

Detector features GLDLDCSiD4-th TrackerTPC + Si-strip Si-stripTPC or DC Calorimeter PFA Rin=2.1m PFA Rin=1.6m PFA Rin=1.27m Compensating Rin=1.5m B3T4T5T 3.5T No return yoke BR CAL Tm Tm Tm 2 (non-PFA) E store 1.6 GJ1.7 GJ1.4 GJ 2.7 GJ Dual solenoid Size R=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 LayerR (mm)  m Si-equivalent per layer is assumed GLD study Performance goal achieved Yasuhiro Sugimoto

Expected performance Momentum resolution GLD study SiD study Performance goal achieved Yasuhiro Sugimoto

Expected performance PFA performance E (GeV) Jet-energy resolution study by M.Thomson for LDC00 (BR 2 =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. 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 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 signal (“standard”) High discharge probability –Advantages Intrinsically flat (pillows) No large support structure needed Difference: Micromegas produce narrower signal than GEM Bottom line: both seem feasible, both still need more R&D Yulan Li

CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China. TPC readout Technologies (Cont.) Tsinghua TU-TPC Yulan Li

CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China. Tsinghua Yulan Li

CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China. Yulan Li

CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China. Phase 1 R&D GEM feasible Phase 1 R&D GEM feasible Yulan Li

CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China. Phase 1 R&D Micromegas with resisitive anode feasible Phase 1 R&D Micromegas with resisitive anode feasible Yulan Li

CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China. Phase 1 R&D Pixel “proof of principle” Phase 1 R&D Pixel “proof of principle” Reconstruct a track electron by electron (or cluster by cluster) ASIC: MediPix2, 55 x 55  m 2 Small residua:  m GEM+Pixel Yulan Li

CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China. LCTPC milestones 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 Commission/Install TPC in the ILC Detector 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 Commission/Install TPC in the ILC Detector Yulan Li

T. Takeshita

6 November 2007CIAW07, Akiya Miyamoto Jet Measurements in ILC Det. Particle reconstruction Charged particles in tracking Detector Photons in the ECAL Neutral 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 CIAW07, Akiya Miyamoto

T. Takeshita

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 Jiang

Two Options Option 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 Id=45&confId=1556 Chun Jiang

B 2 O 3 -SiO 2 -Gd 2 O 3 -BaO 30:25:30:15 doped with Ce 2 O 3 or other dopants Chun JiangChun Jiang, QingJi Zeng, Fuxi Gan, Scintillation luminescence of cerium-doped borosilicate glass containing rare-earth oxide, Proceedings of SPIE, Volume 4141, November 2000, pp QingJi ZengFuxi Gan Density 5.4 g/cm 3 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 Glass Chun Jiang

BSGB Glass Density g/cm 3 Light yield ~500  ’s/MeV (?) Decay time ns Scintillation wavelength460 nm Radiation length1.8 cm Interaction length cm (estimate) Some Properties of the BSGB Glass Chun Jiang

36 BSGB Glass Scintillation Light Yield (80 keV X-ray excitation) Chun Jiang

6 November 2007CIAW07, Akiya Miyamoto ROOT objects : Event Tree & Configuration Our software tools Beamtest Analysis Event Reconstruction Digitizer Finder Fitter Detector Simulator QuickSim FullSim Event Generator Pythia CAIN StdHep Physics Analysis Jet finder  Link to various tools at  GLD Software at  All packages are kept in the CVS. Accessible from 6 November CIAW07, Akiya Miyamoto

6 November 2007CIAW07, Akiya Miyamoto DescriptionDetectorLanguageIO-FormatRegion SimdetFast Monte CarloTeslaTDRFortranStdhep/LCIOEU SGVFast Monte CarloflexibleC++None(LCIO)EU LelapsFast Monte CarloSiD, flexibleC++SIO, LCIOUS QuickSimFast Monte CarloGLDFortranROOTAsia Brahms-SimFull sim. - Geant3TeslaTDRC++ASCII, LCIOEU MokkaFull sim. – Geant4TeslaTDR, LDCC++LCIOEU SLICFull sim. – Geant4SiDC++LCIOUS ILC-ROOTFull sim. – Geant44thC++ROOTUS+EU JupiterFull sim. – Geant4GLDC++ROOT, LCIOAsia Brahms-RecoReconstruction frameworkTeslaTDRFortranLCIOEU Marlin Reconstruction Analysis framework Flexible,LDCC++LCIOEU Org-lcsimReconstruction packagesSiD(flexible)JavaLCIOUS SatellitesReconstruction packagesGLDC++ROOTAsia LCCDConditions data toolkitLDC, SiD,..C++MySQL, LCIOEU GEARGeometry DescriptionFlexibleC++XMLEU LCIOPersistency/Data modelAllC++,Java, Fortran -EU,US,A sia JAS3/WIREDAnalysis tool/Event displayLDC, SiD … Java XML,LCIO,stdhep, heprep, US, EU JSFAnalysis frameworkAllC++ROOT/LCIOAsia Software tools in the world 6 November CIAW07, Akiya Miyamoto

6 November 2007CIAW07, Akiya Miyamoto Jupiter/Satellites for Full Simulation Studies JUPITER JLC Unified Particle Interaction and Tracking EmulatoR IO Input/Output module set URANUS LEDA Monte-Carlo Exact hits To Intermediate Simulated output Unified Reconstruction and ANalysis Utility Set Library Extension for Data Analysis METIS Satellites Geant4 based Simulator JSF/ROOT based Framework 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 CIAW07, Akiya Miyamoto

6 November 2007CIAW07, Akiya Miyamoto GLD Geometry in Jupiter FCAL BCAL IT VTX CH2mask 1 module Include 10cm air gap as a readout space 6 November CIAW07, Akiya Miyamoto

6 November 2007CIAW07, Akiya Miyamoto GLD PFA Performances Using 1x1cm 2 calorimeter cell size  E jet /E jet is uniform except very forward does not change significantly for ECAL cell size of 1x5cm 2 is worse for higher energy jets 6 November CIAW07, 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 get merged 30 GeV 12 GeV 18 GeV 10 GeV Track 6 November CIAW07, Akiya Miyamoto

Detector Optimization Z  uds 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 BR 2 rule) Further studies on physics channels are awaited. 6 November CIAW07, Akiya Miyamoto

6 November 2007CIAW07, Akiya Miyamoto Physics performance Studies of physics performances by full simulations have been started. Preliminary result by GLD-PFA, including ISR/BS, and b-tag. m H offset and wide  (m H ) are seen. Study is in progress to improve them. GLD Cheated PFA Analysis, ISR , undetected particles, and E double count are main contributor to  (m H ). After correct them, it is same as Z0 case 6 November CIAW07, Akiya Miyamoto

6 November 2007CIAW07, Akiya Miyamoto Physics Performance -2 6 November CIAW07, Akiya Miyamoto

Summary GLD and LDC spontaneously merged into ILD and will write a common LOI GLD and LDC spontaneously merged into ILD and will write a common LOI More detail on TPC and Calorimeter R&D More detail on TPC and Calorimeter R&D A total absorption E/H calorimeter with heavy scintillating glasses proposed A total absorption E/H calorimeter with heavy scintillating glasses proposed Software tools based on ROOT and Geant4 have been developed and extensively used for GLD studies Software tools based on ROOT and Geant4 have been developed and extensively used for GLD studies