1. Prototype Performance in D0 test stand M.Yoshida (Osaka Univ.)

2. Prototype of SciFi tracker Scifi stations Top (station C) X and V view Middle (station B) X,V,W view Bottom (station A) X and W view ~80 cm X view W view V view

3. Waveguide Connection bundle of 18 clear fibers (4meter long, 1.05mm  ) bundle of 7×18 clear fibers 126 channel / waveguide

4. DAQ at D0 test stand VLPC VLPC QE~80% for 3HF spectrum AFE (516 channels) AFE (516 channels) 8 MCM (64 channels in each) 8 MCM (64 channels in each) SVX (Sample&Hold / Degitize) SVX (Sample&Hold / Degitize) SASeq (Stand-Alone Sequencer) SASeq (Stand-Alone Sequencer) VB Program on MS- Excell VB Program on MS- Excell 3HF spectrum 500nm 700nm

5. Setup in D0 test stand at Fermilab Cryostat for VLPC cassette AFE (Analog Front End board) Trigger Scintillator 36cm×36cm×0.5cm(t) waveguide Lead blocks 10cm thick (100MeV for MIP)

6. 1D tracking (H. Sakamoto) Hit definition Threshold is set at 0.5 p.e. Tracking 1D tracking in X view Minimize residual Δ A B C X view × × Δ

7. Light yield as a function of 3HF concentration 3HF concentration in B station X view (B) 5000ppm W view (B) 3500ppm V view (B) 2500ppm ADC spectrum for each view 3HF5000ppm3500ppm2500ppm p.e.10.613.613.4

8. 3D tracking (M. Ellis)

9. 3D tracking PTP + 5000 Mean 13.5p.e. PTP + 2500 Mean 16.3p.e. Shape is reasonable?  Careful study with MC is needed. (We have more data, should update the figures)

10. Summary Prototype tracker has been constructed Prototype tracker has been constructed 3 stations 3 stations VLPC readout VLPC readout Light yield is measured Light yield is measured 1D & 3D tracking have been carried out. 1D & 3D tracking have been carried out. Light yield in pT1%+3HF5000ppm is found to be less than pT1%+2500ppm Light yield in pT1%+3HF5000ppm is found to be less than pT1%+2500ppm Inconsistent result with test-beam data. Inconsistent result with test-beam data. We will produce another station (made of 2500ppm and 5000ppm) to be added to the prototype, and will test it at KEK-PS in Apr. 2005. We will produce another station (made of 2500ppm and 5000ppm) to be added to the prototype, and will test it at KEK-PS in Apr. 2005.