Kruger 2026: Discovery Physics at the LHC

Investigation of candidate radiation resistant materials with high secondary electron emission yield for Photomultiplier tubes (PMTs) in the readout systems of the ATLAS TileCal.

Not scheduled

15m

Kruger National Park

Oral Instrumentation, Tech Transfer, and Quantum Information Parallel - Tech, QI

Speakers

Mr Gaurav Lall (University of the Witwatersrand) ELIAS SIDERAS-HADDAD (WITS UNIVERSITY)

Description

Photomultiplier tubes (PMTs) play a critical role in the readout systems of the ATLAS TileCal. They rely on dynode materials with high secondary electron emission (SEE) and radiation tolerance. Secondary electron yields corelate with the electrical conductivity of these dynode materials which are usually extremely high band gap insulators. The conductivity in its turn is dramatically affected by radiation induced defects which in high radiation doses cause damaging electronic fatigue. This study investigates the effects of gamma radiation, with doses comparable to the ones in TileCal, on the electrical properties of three candidate dynode materials: CNS, Al₂O₃ and MgO. In addition, secondary electron yield results are shown for pristine and irradiated samples.