Detector Studies in Asia

T.Tauchi, Prague Ecfa/Desy WorkshopSession on Detector Plenary Reports

Sunday, 17 November 2002

Configuration of the JLC detector

Interaction Region and fast feedback system

VTX detector design

• Baseline design – |cos | < 0.90– Pixel size 25 m– 1.25cm x 5cm x 330m– 4Layers with 10 deg tilt

( r=24,36,48,60 mm)( Ladder 16/24/32/40)(Sensor 2/3/4/5)

– Intrinsic resolution 4 m(Just for a simulation input )

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N.Tamura, G.Iwai, K.Fujiwara, H.Takayama; Niigata UniversityY.Sugimoto, A.Miyamoto ; KEKT. Aso ; Toyama National College of Maritime TechnologyK.Abe ; Tohoku Gakuin Univ.

VTX/CCD status and future plans• Goal --- CCD operation at room temperature

• Radiation hardness : No problem, so far.– But, further investigation is necessary.

Electrons => Higher energy must be studied experimentally. ( Experiment will be conducted in this December, Ee=100MeV. )Neutrons => Yield of neutron is ambiguous ( beam dump ) ( Reliable simulation with precise geometry, JUPITER)

• Spatial resolution : < 3m at -15oC.– More investigation of charge sharing property improve resolution? ( Laser scanner test at Niigata Univ. with 2x2m2 spot.)

• Readout electronics: Evaluating– Study the effect of fast readout(20MHz) for irradiated samples

• Evaluation of thinned device– Partially thinned CCD (Shoji-structure) ..

N.Tamura, Japan-UK meeting, Nov.2002

H. Park, Y.J. Kim, D.H. Shim (CHEP, Kyungpook National Univ.)J.M. Yang , I.H. Park, M.Y. Kim, N.H. Park (Ewha Womans Univ.)J.S. Kang, B.Y. Han, G.B. Yu, H.C. Ha (Korea Univ.)

5 layers at r=9 to 37 cmangular coverage |cos |<0.9spatial resolution = 40mthickness of a layer: 0.6% radiation length

without background hits with background hits Efficiency Purity Efficiency PurityNo IMT 71.6% 72.5% 71.1% 73.3%With IMT 91.7% 94.4% 90.2% 94.1%

For e+e- -> hZ at Ecm=300GeV

Intermediate Tracker

Linking performance of VTX to CDC

Central Tracker (CDC)

• Jet type chamber with long wires (3.1(4.6)m) at B=3 (2)T Momentum resolution:(1/pt)=3 (1) x 10-4/(GeV/c)

z(stereo wires)=1mm, 2track (r)=2mm,t=2nsec

AVU AVU AVU A

KEK , Kinki University, Mindanao State University, Tokyo University of Agriculture & Technology, University of Tsukuba

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1 2 3 4 5 mm

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2 track separation efficiency

Spatial resolution

Momentum resolution

CDC:Pt/Pt=3 x 10-4 Pt (GeV/c)

CDC+VTX:Pt/Pt=0.9 x 10-4 Pt (GeV/c)

CalorimeterKEK, Kobe, Konan, Niigata, Shinshu and Tsukuba

Tile/Fiber Sampling Calorimeter• Hardware Compensation• Design Flexibility• Reasonable cost• Well-established thechnology• Sufficient granularity for EMCAL ?

Scintillator tiles of 5 x 5

CAL: Basic Parameters

R & D on EMCAL and SHmax

EMCAL :Scint. tile of 4cm x 4cm x 1mmt

(4cm is limited by fiber curvature)Scint.strip of 1cm x 20cm x 2mmt

fine granularitycrossed-strip layout like Shmaxneeds multi-channel photo detectorsghost-rejection capability (full simulation)

SHmax:Scint.strip of 1cm x 20cm x 1cmt

WLS fiber+multi-channel photon detectorhigh-gain APD attached directly at theend of Scint. strip

Scint. Tile with WLS fiber

Scint. Strip with WLS fiber

Beam Tests of EMCAL

EMCAL1) Tile of 4cm x 4cm (7.1Xo)2) Strip Arrays (x,y) of1cm-width

Sub-system R&Da) SHmax:direct-attached APD and WLS-readout.b) Super-multi-channel photo -detectors.

Present status and future plans

1st exp. just finished on Nov.14 for 1(partial), 2, and a.

2nd exp in November 2003 with 1(full) and b.

Y. Fujii for ECFA-DESY at Prague, 2002-Nov-17

Setup of beam test at KEK-2

SHmax (conventional & direct-APD)

JSF, A.Miyamoto

JSF interactive, A.Miyamoto

R view of VTX

CDC10 layers36~108cells / layer5 wires / layer rwire=15m

Event display ofe+e- → Z0h E = 350GeV

T.AsoJUPITER figures

Simulation of Beam Delivery SystemGeometry codes are generated from a SAD file for FFIR opticsParticle transportation from the entrance of FF to IP have been confirmed using Geant4

University of Tokyo

Support tube R&DH. Yamaoka, 5th ACFA-LC workshop July 10 - 12, 2002

H. Yamaoka, 5th ACFA-LC workshop July 10 - 12, 2002

Support tube R&D status

H. Yamaoka, 5th ACFA-LC workshop July 10 - 12, 2002Support tube R&D : Test conf. 4

Conf.3Conf.4

Near Future PlansVTX:Radiation (bulk damage) test by 100MeV e’s fast electronics (20MHz)IMT: prototype manufacturing and testCDC: Investigation of wire creeping evaluation of performance by full simulationCAL: EM-CAL(4cm tile & 1cm strip) beam test SHMAX(1cm x 20cm x 1cmt / fiber) beam test granularity and energy resolution studiesIR:Optimization of L* ( 3 ~4.3m) and BDS Background study with a fast feedback system prototype study on the support tube (nm stability)Software: JSF development (C++ language) ( JUPITER for full simulation based on GEANT4)

Comprehensive evaluation of detector performance

“Roadmap”Symposium will be held on 15 February,2003.