Speaker
Jiajie Ling
(BNL)
Description
Large, deep, well shielded liquid detectors have become an important technology for the detection of neutrinos over a wide dynamic range of few MeV to TeV. The critical component of this technology is the large format semi-hemispherical photo-multiplier with diameter in the range of 25 to 50 cm. The survival of the glass envelopes of these photo-multipliers under high pressure is the subject of this paper. We report initial results from an R&D program to understand the pressure performance of some photo-multiplier candidates. In particular we analyze the modes of implosion failures in these bulbs.
We report detailed measurements on the shock waves that would results from such implosions and compare them to modern hydrodynamic simulation codes. Using these results we extrapolate to other bulb geometries and make initial recommendations on deployment of the PMT sensors in deep detectors with focus on mitigation of an implosion chain reaction.
Author
Jiajie Ling
(BNL)
Co-authors
Hidekazu Tanaka
(BNL)
Kenneth Sexton
(BNL)
Milind Diwan
(BNL)
Nikolaos Simos
(BNL)
Rahul Sharma
(BNL)
