R2658 - PHOTOMULTIPLIER TUBES

Value Unit 185 to 1010 400 InGaAs (Cs) 3 × 12 UV glass Cu-BeO Circular-cage 9 Approx.

4 Approx.

6 11-pin base JEDEC No.

mm pF pF g 0.01 100 200 300 400 500 600 700 800 900 1000 1100

• High QE in Near IR Region QE 0.13% at 1 µ m Wide Wavelength Range 185 to 1010 nm Low Dark Current 1 nA at 1250 V (Typ. ) The R2658 and the R2658P are 28 mm (1-1/8 inch) diameter side-on photomultiplier tubes using a newly developed InGaAs semiconductor photocathode. The InGaAs photocathode is sensitive from UV to near IR radiations (as long as over 1010 nm) longer than wavelength limit of GaAs photocathode, and yet offers low dark current. The dark current is 2 orders lower than the commercia.