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

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Presentation transcript:

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

3/18/20022 PMT for measurements

3/18/20023 PMT Quantum Efficiency

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

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

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

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

3/18/20028 Elements tested

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

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

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

3/18/ Final results

3/18/ 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) P.E. TOTAL (MRS) P.E. After attenuation and optical connectors ~ 4 times less

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