1. 3/18/20021 Update on DHC elements testing. Task force: A. Dyshkant, M.Martin, V. Rykalin V. Rykalin

2. 3/18/20022 PMT for measurements

3. 3/18/20023 PMT Quantum Efficiency

4. 3/18/20024 Extruded scintillator,emission intensity versus wavelength.

5. 3/18/20025 BC 408, emission intensity versus wavelength.

6. 3/18/20026 BCF 92, absorption end emission versus wavelength

7. 3/18/20027 Fiber transparency versus loop radius (V. Makeev measurements)

8. 3/18/20028 Elements tested

9. 3/18/20029 Hexagonal, machined at NIU, BC-408,1mm BCF-92, N=1.8 P.E.

10. 3/18/200210 BC-404, 1cm thickness,1.2 mm fiber BCF 92 N=9.6 P.E. Reflective end

11. 3/18/200211 Extruded MINOS,0.9 cm thickness, 1 mm BCF-92 N=3.7 P.E., two ends.

12. 3/18/200212 Final results

13. 3/18/200213 Possible improvements for NIU 9 mm thickness,10 cm fiber active length Deeper grooving ~ 1.3 Reflective coating ~ 1.5 Machining optimization ~ 2-4 VLPC QE=60% ~ 4 MRS 30% ~ 2 TOTAL (VLPC) 15.6 -31.2 P.E. TOTAL (MRS) 7.8 -15.6 P.E. After attenuation and optical connectors ~ 4 times less

14. 3/18/200214 VLPC, 0.9 cm, 2 optical connectors, 0.5 mm fiber BCF-92 N=6 P.E.