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Recent advances with THGEM detectors

The Thick Gaseous Electron Multiplier (THGEM) is a simple and robust electrode suitable for large area detectors. In this work the results of extensive comparative studies of the physical properties of different THGEM-based structures are reviewed. The focus is on newly suggested THGEM-like WELL con...

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Detalles Bibliográficos
Autores principales: Bressler, S., Arazi, L., Moleri, L., Pitt, M., Rubin, A., Breskin, A.
Lenguaje:eng
Publicado: 2013
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1748-0221/8/12/C12012
http://cds.cern.ch/record/1610754
Descripción
Sumario:The Thick Gaseous Electron Multiplier (THGEM) is a simple and robust electrode suitable for large area detectors. In this work the results of extensive comparative studies of the physical properties of different THGEM-based structures are reviewed. The focus is on newly suggested THGEM-like WELL configurations as well as on recently developed characterization methods. The WELL structures are single-sided THGEM electrodes directly coupled to different anode readout electrodes; they differ by the coupling concept of the bottom THGEM electrode to the metallic readout pads. The results are compared to that of traditional double-sided THGEM electrodes followed by induction gaps — in some cases with moderate additional multiplication within the gap. We compare the different configurations in terms of gain, avalanche extension, discharge-rate and magnitude as well as rate capabilities over a broad dynamic range — exploiting a method that mimics highly ionizing particles in the laboratory. We report on recent studies of avalanche distribution in THGEM holes using optical readout.