Overview of Asian Tracking R&D
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Overview of Asian Tracking R&D. • Vertex Detector • Silicon µ-Strip Intermediate Tracker • Central Tracker - Jet Chamber - Si µ -strip Central Tracker. Hwanbae Park Kyungpook National Univ. ▣ JLC: Tracker. ▣ Vertex Tracker Working Group. • CCD based Vertex Tracker Group

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Overview of Asian Tracking R&D

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Overview of asian tracking r d

Overview of Asian Tracking R&D

• Vertex Detector

• Silicon µ-Strip Intermediate Tracker

• Central Tracker

- Jet Chamber

- Si µ-strip Central Tracker

Hwanbae Park

Kyungpook National Univ.


Overview of asian tracking r d

▣ JLC: Tracker


Overview of asian tracking r d

▣ Vertex Tracker Working Group

• CCD based Vertex Tracker Group

Y. Sugimoto*, A. Miyamoto (KEK)

N. Tamura, G. Iwai, K. Fujiwara, H. Takayama (Niigate U.)

K. Abe, T. Nagamine (Tohoku U.)

T. Aso (Toyama National College of Maritime Technology)

http://www-jlc.kek.jp/subg/svd/


Overview of asian tracking r d

S/N > 10

@278K

Intrinsic Resolution

Is better than

3 um.

▣ R&D Activities: Vertex Tracker

√ operation at near room temperature

√ spatial resolution, S/N ratio

√ partially thinned wafers

√ radiation hardness

√ fast readout


Overview of asian tracking r d

18.5cm

76.5cm

▣ Intermediate Tracker Working Group

• SiliconIntermediate Tracker Group

H. Park* (Kyungpook National U.)

I.H. Park (Ewha Womans U.), B.G. Cheon (SKKU)

H.J. Kim, J.H. Kang, Y.J. Kwon (Yonsei U.)

J.S. Kang (Korea U.), S. Kim, J. Lee (SNU)


Overview of asian tracking r d

Si

Bare Si wafer

Oxidation

N+ (Diffusion)

Photo Lithography

UV

UV

Metal deposition

P+ (Implantation)

Oxide Etching

Photo-resist Strip

Mask2

Mask 1

Photo Lithography

Metal Etching

Photo-resist Strip

▣ R&D Activities: Intermediate Tracker

√linking and reconstruction efficiency (Fast Simulation)

√ track momentum resolution (Full Simulation)

√ Si PIN diode simulation/design/fabrication

√S/N ratio measurement and beam test


Overview of asian tracking r d

▣ Central Tracker Working Group

• Jet Chamber Si µ-strip

M. Kobayashi*, K. Fujii (KEK) M. Iwasaki*, H. Aihara

N. Khalatyan (U. of Tsukuba) (U. of Tokyo)

A.M. Bacala (MSU), K. Hoshina (TUAT)

T. Abe (Nagoya U.),K. Watanabe (Kogakuin U.)

http://www-jlc.kek.jp/subg/cdc/


Overview of asian tracking r d

▣ R&D Activities: Jet Chamber

• 4.6 m Test Jet Chamber (6 axial and 10 stereo super layers)

√ measurements of wire tensions and positions

√ cosmic ray tests with a candidate gas mixtures

√ space charge effect measurement

√ basic chamber studies with “baby” chamber

√ spatial and momentum resolution

√ two track separation

√ wire material studies

√ full CDC detector simulator based on Geant4


Overview of asian tracking r d

▣ R&D Activities: Si µ-strip central tracker

(with NLC detector parameters)

√ Full Simulation Study for detector parameter

√ reconstruction efficiency

√ momentum resolution

√ photon background simulation

  • - - #hit1 in central

  • & #VXD hit=5

  • - - #hit2 in central

  • & #VXD hit=5

- - - #hit3 in central

- - - #hit=5 in central

|cosq|<0.8


Overview of asian tracking r d

▣ Summary

□ Vertex Detector

- spatial resolution and distortion of thin wafers measured

- innermost layer survive more than 3 years under option “A”

- radiation damage effect studied

□ Intermediate Tracker

- fast and full simulation with 5 layers

- Si µ-strip R&D proposal submitted (pending)

□ Central Tracker

- chamber parameters studied with “baby chamber”

- track momentum and two track separation

- Si µ-strip R&D started (detail simulation studies carried)


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