6533b860fe1ef96bd12c38fc

RESEARCH PRODUCT

Improved lifetime of microchannel-plate PMTs

W. LauthA. GerhardtEuan N. CowieW. EyrichK. GötzenM. PatsyukT. KeriR. DzhygadloHarphool KumawatK. FöhlM. ZühlsdorfA. HayrapetyanB. KröckA. LehmannPaul Alois BuhlerK. PetersG. RosnerR. A. MontgomeryKen SuzukiC. SchwarzO. MerleL. SchmittR. HohlerJohann MartonM. HoekG. KalicyJ. RiekeMichael DürenMichaela ThielV.kh. DodokhovConcettina SfientiL. GruberJ. SchwieningD. LehmannM. CardinaliPatrick AchenbachB. LewandowskiA. BrittingF. UhligG. SchepersM. Traxler

subject

PhysicsNuclear and High Energy PhysicsPhotomultiplierPhotonbusiness.industryDetectorNanotechnologyengineering.materialCathodeAnodelaw.inventionCoatinglawengineeringOptoelectronicsQuantum efficiencyMicrochannel plate detectorbusinessInstrumentation

description

Abstract The charged particle identification at the PANDA experiment will be mainly performed with DIRC detectors. Because of their advantageous properties the preferred photon sensors are MCP-PMTs. However, until recently these devices showed serious aging problems which resulted in a diminishing quantum efficiency (QE) of the photo cathode. By applying innovative countermeasures against the aging causes, the manufacturers recently succeeded in drastically improving the lifetime of MCP-PMTs. Especially the application of an ALD coating technique to seal the material of the micro-channels proves very powerful and results in a lifetime of ≈ 6 C / cm 2 integrated anode charge without a substantial QE degradation for the latest PHOTONIS XP85112. This paper will present a comparative measurement of the lifetime of several older and recent MCP-PMTs demonstrating this progress.

yearjournalcountryeditionlanguage
2014-12-01Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
https://doi.org/10.1016/j.nima.2014.04.005