21-23 August 2012
Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), The University of Tokyo
Asia/Tokyo timezone

Mechanical Performance of Large Format Underwater Photo-multiplier

23 Aug 2012, 11:10
15m
Lecture Hall (Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), The University of Tokyo)

Lecture Hall

Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), The University of Tokyo

5-1-5 Kashiwanoha, Kashiwa city, Chiba, 277-8583 JAPAN

Speaker

Dr Jiajie Ling (Brookhaven National Laboratory)

Description

Large, deep, well shielded liquid detectors have become an important technology for the detection of neutrinos over a wide dynamic range of a few MeV to TeV. The critical component of this technology is the large format semi-hemispherical photo-multiplier tube with diameters in the range of 25 to 50cm. The survival of an assembled array of these photo-multiplier tubes under high hydrostatic pressure is the subject of this study. These are the results from an R&D program which is intended to understand the PMT performance under hydrostatic pressure and the modes of failure when a photo-multiplier tube implodes under hydrostatic pressure. Our tests include detailed measurements of the shock wave which results from the implosion of a photo-multiplier tube with different installation enclosure configuration. And we also include a comparison of the test data to modern hydrodynamic simulation codes. Using these results we can extrapolate to other tube geometries and make recommendation on deployment of the photo-multiplier tubes in deep water detectors with a focus on risk mitigation from a tube implosion shock wave causing a chain reaction loss of multiple tubes.

Primary author

Dr Jiajie Ling (Brookhaven National Laboratory)

Co-authors

Presentation Materials

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