  Water Cherenkov and scintillator detectors are a critical tool for neutrino
physics.Their large size, low threshold, and low operational cost make them
excellent detectors for long baseline neutrino oscillations, proton decay,
supernova and solar neutrinos, double beta decay, and ultra-high energy
astrophysical neutrinos. Proposals for a new generation of large detectors rely
on the availability of large format, fast, cost-effective photomultiplier
tubes. The Electron Tubes Enterprises, Ltd (ETEL) D784KFLB 11 inch
Photomultiplier Tube has been developed for large neutrino detectors. We have
measured the timing characteristics, relative efficiency, and magnetic field
sensitivity of the first fifteen prototypes.
