Development of HPDs with a 18-mm-diameter GaAsP - NDIP 11

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Lifetime Measurement (acceleration test) Photocathode current 200 pA (~3 times of NSB) Quartz Halogen Lamp (Iwazaki Electric JC12V20W20H/G1) – whole area of photocathode Gain 50000 (-8kV, 330V) AD anode current preliminary Measured in Hamamatsu systematically still on going…(MPI and Hamamatsu) 84% at 3500 h (= 2.52 mC of total PC harge) (expect. 80 % at 3.5 mC of PC charge) → Consistent with expectation More tubes will be measured 23 Jun 05: Beaune M.Hayashida et al. 16
10 Star Light and NSB # Objects 4 degree # stars
Page 1 and 2: Development of HPDs 18-mm with a 18
Page 3 and 4: Imaging Atmospheric Cherenkov Teles
Page 5 and 6: Previous Work Presentations at Beau
Page 7 and 8: HPD with 18-mm 18 mm GaAsP Photocat
Page 9 and 10: Signal Gain Overall Gain ~ 50000 (P
Page 11 and 12: Dynamic Range ~ 5000 (condition -8
Page 13 and 14: First Tests with WaveLength Shifter
Page 15: GaAsP Photocathode Lifetime Definit
Page 19 and 20: 1.Summary 18mm GaAsP HPDs are almo

Development of HPDs with a 18-mm-diameter GaAsP - NDIP 11

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