0000000000246352

AUTHOR

D. Miehling

showing 3 related works from this author

Recent progress with microchannel-plate PMTs

2020

Abstract Microchannel-plate (MCP) PMTs were identified as the only suitable photon sensors for the two DIRC detectors of the PANDA experiment at FAIR. As the long-standing aging problem of MCP-PMTs was recently overcome by coating the MCP pores with an atomic layer deposition (ALD) technique, further improved 2 ″ MCP-PMTs were investigated. The best PHOTONIS device has reached a lifetime of > 20 C/cm2 integrated anode charge without any sign of aging. Also the newly developed 2 ″ MCP-PMTs of Hamamatsu are maturing and are usable in high rate environments. The status of our long-term lifetime measurements and the performance parameters of the currently most advanced ALD-coated MCP-PMTs from …

PhysicsNuclear and High Energy PhysicsPhotonPixel010308 nuclear & particles physicsbusiness.industryDetector01 natural sciences030218 nuclear medicine & medical imagingAnode03 medical and health sciencesAtomic layer deposition0302 clinical medicineRecoilData acquisition0103 physical sciencesOptoelectronicsMicrochannel plate detectorbusinessInstrumentationNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Latest improvements of microchannel-plate PMTS

2020

Abstract The DIRC detectors of the PANDA experiment at FAIR will use multi-anode MCP-PMTs as photon sensors. After long and extensive R&D work the performance parameters of the recent 2” MCP-PMT models are converging towards the required values. The lifetime of most ALD-coated MCP-PMTs is well surpassing the DIRC requirements with the best tube currently reaching > 22 C/cm2 integrated anode charge without aging. The performance of the most advanced MCP-PMTs from PHOTONIS and Hamamatsu fulfill basically all requirements with a highlight being the high detective quantum efficiency (DQE) of almost 30% for the PHOTONIS 9002108. The improvements of the latest MCP-PMT models compared to former tu…

Detective quantum efficiencyPhysicsNuclear and High Energy PhysicsPhotonOpticsbusiness.industryDetectorMicrochannel plate detectorTube (fluid conveyance)Charge (physics)businessInstrumentationAnodeNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Lifetime of MCP-PMTs and other performance features

2018

The ANDA experiment at FAIR will use DIRC detectors for the separation of hadrons. The compactness of the ANDA detector requires the image planes of these detectors to be placed inside the magnetic field of the solenoid. Due to this and other boundary conditions MCP-PMTs were identified as the only suitable photon sensors. Until recently the major obstacle for an application of MCP-PMTs in high rate experiments like ANDA were serious aging problems which led to damage at the photo-cathode and a fast declining quantum efficiency as the integrated anode charge (IAC) increased. With new countermeasures against the aging, in particular due to the application of an atomic layer deposition (ALD) …

PhysicsPhoton010308 nuclear & particles physicsbusiness.industryDetectorElectron01 natural sciencesAnodeAtomic layer depositionData acquisitionRecoilOptics0103 physical sciencesQuantum efficiency010306 general physicsbusinessInstrumentationMathematical PhysicsJournal of Instrumentation
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