1. Detector Studies in Asia
T.Tauchi, Prague Ecfa/Desy Workshop
Session on Detector Plenary Reports
Sunday, 17 November 2002

2. Configuration of the JLC detector

3. Interaction Region and fast feedback system

4. VTX detector design Baseline design |cos | < 0.90 Pixel size 25 mm
N.Tamura, G.Iwai, K.Fujiwara, H.Takayama; Niigata University
Y.Sugimoto, A.Miyamoto ; KEK
T. Aso ; Toyama National College of Maritime Technology
K.Abe ; Tohoku Gakuin Univ. 18 24 60
Baseline design
|cos | < 0.90
Pixel size 25 mm
1.25cm x 5cm x 330mm
4Layers with 10 deg tilt ( r=24,36,48,60 mm) ( Ladder 16/24/32/40) (Sensor 2/3/4/5)
Intrinsic resolution 4 mm (Just for a simulation input )

5. VTX/CCD status and future plans
N.Tamura, Japan-UK meeting, Nov.2002
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 : < 3mm at -15oC.
More investigation of charge sharing property improve resolution?
( Laser scanner test at Niigata Univ. with 2x2mm2 spot.)
Readout electronics: Evaluating
Study the effect of fast readout(20MHz) for irradiated samples
Evaluation of thinned device
Partially thinned CCD (Shoji-structure) ..

6. Intermediate Tracker 5 layers at r=9 to 37 cm
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 cm
angular coverage |cos q|<0.9
spatial resolution = 40mm
thickness of a layer: 0.6% radiation length
Linking performance of VTX to CDC
without background hits with background hits
Efficiency Purity Efficiency Purity
No IMT % % % %
With IMT % % % %
For e+e- -> hZ at Ecm=300GeV

7. Central Tracker (CDC)
KEK , Kinki University, Mindanao State University, Tokyo University of
Agriculture & Technology, University of Tsukuba
Jet type chamber with long wires (3.1(4.6)m) at B=3 (2)T
Momentum resolution:d(1/pt)=3 (1) x 10-4/(GeV/c)
sz(stereo wires)=1mm, s2track (rf)=2mm,st=2nsec
AVU AVU AVU A

8. CDC Performances Spatial resolution 2 track separation efficiency1
0.8
0.6
0.4
0.2 mm
CDC Performances
Momentum resolution
CDC:
sPt/Pt=3 x 10-4 Pt (GeV/c)
CDC+VTX:
sPt/Pt=0.9 x 10-4 Pt (GeV/c)

9. Calorimeter KEK, 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

10. CAL: Basic Parameters

11. R & D on EMCAL and SHmax EMCAL : SHmax:
Scint. tile of 4cm x 4cm x 1mmt
(4cm is limited by fiber curvature)
Scint.strip of 1cm x 20cm x 2mmt
fine granularity
crossed-strip layout like Shmax
needs multi-channel photo detectors
ghost-rejection capability (full simulation)
SHmax:
Scint.strip of 1cm x 20cm x 1cmt
WLS fiber+multi-channel photon detector
high-gain APD attached directly at the
end of Scint. strip
Scint. Tile with WLS fiber
Scint. Strip with WLS fiber

12. Beam Tests of EMCAL Setup of beam test at KEK-p2 EMCAL
Y. Fujii for ECFA-DESY at Prague, 2002-Nov-17
Beam Tests of EMCAL
EMCAL
1) Tile of 4cm x 4cm (7.1Xo)
2) Strip Arrays (x,y) of1cm-width
Sub-system R&D
a) 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.
Setup of beam test at KEK-p2

13. SHmax (conventional & direct-APD)

14. JSF, A.Miyamoto

15. JSF interactive, A.Miyamoto

16. JUPITER figures Event display of e+e- → Z0h E = 350GeV T.Aso
RF view of VTX
CDC
10 layers
36~108cells / layer
5 wires / layer
rwire=15mm
Event display of
e+e- → Z0h
E = 350GeV

17. Simulation of Beam Delivery System
University of Tokyo
Geometry codes are generated from a SAD file for FFIR optics
Particle transportation from the entrance of FF to IP have been confirmed using Geant4

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

19. Support tube R&D status
H. Yamaoka, 5th ACFA-LC workshop July , 2002
Support tube R&D status

20. Support tube R&D : Test conf. 4
H. Yamaoka, 5th ACFA-LC workshop July , 2002
Support tube R&D : Test conf. 4
Conf.4
Conf.3

21. Near Future Plans Comprehensive evaluation of detector performance
VTX:Radiation (bulk damage) test by 100MeV e’s
fast electronics (20MHz)
IMT: prototype manufacturing and test
CDC: Investigation of wire creeping
evaluation of performance by full simulation
CAL: EM-CAL(4cm tile & 1cm strip) beam test
SHMAX(1cm x 20cm x 1cmt / fiber) beam test
granularity and energy resolution studies
IR: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.