Detector Studies in Asia

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
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.

• Baseline design
• cos lt 0.90
• Pixel size 25 mm
• 1.25cm x 5cm x 330mm
• 4Layers with 10 deg tilt( r24,36,48,60 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

• Goal --- CCD operation at room temperature
• Radiation hardness No problem, so far.
• But, further investigation is necessary.Electrons
  gt Higher energy must be studied
  experimentally. ( Experiment will
  be conducted in this December, Ee100MeV.
  )Neutrons gt Yield of neutron is ambiguous (
  beam dump ) ( Reliable simulation
  with precise geometry, JUPITER)
• Spatial resolution lt 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
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 r9 to 37 cm angular coverage cos
qlt0.9 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
71.6 72.5 71.1
73.3 With IMT 91.7 94.4
90.2 94.1
For ee- -gt hZ at Ecm300GeV
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
  B3 (2)T
• Momentum resolutiond(1/pt)3 (1) x
  10-4/(GeV/c)
• sz(stereo wires)1mm, s2track (rf)2mm,st2nsec

AVU AVU AVU A
8
CDC Performances
2 track separation efficiency
Spatial resolution
1 0.8 0.6 0.4 0.2 0
1 2 3 4 5 mm
Momentum resolution
CDC sPt/Pt3 x 10-4 Pt (GeV/c)
CDCVTX sPt/Pt0.9 x 10-4 Pt (GeV/c)
9
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
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CAL Basic Parameters
11
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 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 fibermulti-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
Y. Fujii for ECFA-DESY at Prague, 2002-Nov-17

• EMCAL
• 1) Tile of 4cm x 4cm (7.1Xo)
• 2) Strip Arrays (x,y) of1cm-width
• Sub-system RD
• a) SHmaxdirect-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
T.Aso
RF view of VTX
CDC 10 layers 36108cells / layer 5 wires /
layer rwire15mm
Event display of ee- ? 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
Support tube RD
H. Yamaoka, 5th ACFA-LC workshop July 10 - 12,
2002
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Support tube RD status
H. Yamaoka, 5th ACFA-LC workshop July 10 - 12,
2002
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Support tube RD Test conf. 4
H. Yamaoka, 5th ACFA-LC workshop July 10 - 12,
2002
Conf.4
Conf.3
21
Near Future Plans

• VTXRadiation (bulk damage) test by 100MeV es
• 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
• IROptimization 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
• RoadmapSymposium will be held on 15
  February,2003.