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Advances in the Large Area Picosecond Photo-Detector (LAPPD): 8" x 8" MCP-PMT with Capacitively Coupled Readout
Shawn Shin, Melvin Aviles, Stephen Clarke +8
We present advances made in the Large Area Picosecond Photodetector (LAPPD), an 8" 8" microchannel plate photomultiplier tube (MCP-PMT), since pilot production was initiat…
Performance of Large Area Picosecond Photo-Detectors (LAPPD)
A. V. Lyashenko, B. W. Adams, M. Aviles +14
We report on performance results achieved for recently produced LAPPDs - largest comercially available planar geometry photodetectors based on microchannel plates. These results in…
Physics reach of the XENON1T dark matter experiment
The XENON collaboration, E. Aprile, J. Aalbers +113
The XENON1T experiment is currently in the commissioning phase at the Laboratori Nazionali del Gran Sasso, Italy. In this article we study the experiment's expected sensitivity to…
The Large Underground Xenon (LUX) Experiment
D. S. Akerib, X. Bai, S. Bedikian +91
The Large Underground Xenon (LUX) collaboration has designed and constructed a dual-phase xenon detector, in order to conduct a search for Weakly Interacting Massive Particles(WIMP…
An Ultra-Low Background PMT for Liquid Xenon Detectors
D. S. Akerib, X. Bai, E. Bernard +64
Results are presented from radioactivity screening of two models of photomultiplier tubes designed for use in current and future liquid xenon experiments. The Hamamatsu 5.6 cm diam…
Radio-assay of Titanium samples for the LUX Experiment
D. S. Akerib, X. Bai, S. Bedikian +63
We report on the screening of samples of titanium metal for their radio-purity. The screening process described in this work led to the selection of materials used in the construct…
An integrated Micromegas UV-photon detector
Joost Melai, Alexey Lyashenko, Amos Breskin +5
Preliminary results of a photon detector combining a Micromegas like multiplier coated with a UV-sensitive CsI photocathode are described. The multiplier is made in a CMOS compatib…
Towards THGEM UV-photon detectors for RICH: on single-photon detection efficiency in Ne/CH4 and Ne/CF4
C. D. R. Azevedo, M. Cortesi, A. V. Lyashenko +7
The article deals with the detection efficiency of UV-photon detectors consisting of Thick Gas Electron Multipliers (THGEM) coated with CsI photocathode, operated in atmospheric Ne…
Development of high-gain gaseous photomultipliers for the visible spectral range
A. V. Lyashenko, A. Breskin, R. Chechik +3
We summarize the development of visible-sensitive gaseous photomultipliers, combining a semitransparent bi-alkali photocathode with a state-of-the-art cascaded electron multiplier.…
Ion-induced secondary electron emission from K-Cs-Sb, Na-K-Sb and Cs-Sb photocathodes and its relevance to the operation of gaseous avalanche photomultipliers
A. Lyashenko, A. Breskin, R. Chechik +1
The operation of visible-sensitive gaseous- and, to some extent, vacuum-photomultipliers is critically affected by secondary electrons originating from ion impact on the photocatho…
High-gain DC-mode operated Gaseous Photomultipliers for the visible spectral range
A. Lyashenko, A. Breskin, R. Chechik +3
We shortly describe recent progress in photon detectors combining bi-alkali photocathodes and cascaded patterned gas-avalanche electron multipliers. It permitted the development an…
High pressure operation of the Photon-Assisted Cascaded Electron Multiplier
F. D. Amaro, J. F. C. A. Veloso, J. M. F. dos Santos +3
We present the operation of the recently introduced Photon Assisted Cascaded Electron Multiplier (PACEM) in xenon at high pressure. The PACEM is a multi step electron multiplier wh…
Efficient ion blocking in gaseous detectors and its application to gas-avalanche photomultipliers sensitive in the visible-light range
A. V. Lyashenko, A. Breskin, R. Chechik +3
A novel concept for ion blocking in gas-avalanche detectors was developed, comprising cascaded micro-hole electron multipliers with patterned electrodes for ion defocusing. This le…
Further progress in ion back-flow reduction with patterned gaseous hole-multipliers
A. V. Lyashenko, A. Breskin, R. Chechik +3
A new idea on electrostatic deviation and capture of back-drifting avalanche-ions in cascaded gaseous hole-multipliers is presented. It involves a flipped reversed-bias Micro-Hole…
Advances in ion back-flow reduction in cascaded gaseous electron multipliers incorporating R-MHSP elements
A. V. Lyashenko, A. Breskin, R. Chechik +3
A new concept is presented for the reduction of ion back-flow in GEM-based cascaded gaseous electron multipliers, by incorporating Micro-Hole & Strip Plate (MHSP) elements operatin…
The Photon-Assisted Cascaded Electron Multiplier: a Concept for Potential Avalanche-Ion Blocking
J. F. C. A. Veloso, F. D. Amaro, J. M. F. dos Santos +3
We present a Photon-Assisted Cascaded Electron Multipliers (PACEM) which has a potential for ion back-flow blocking in gaseous radiation detectors: the avalanche from a first multi…
MHSP in reversed-biased operation mode for ion blocking in gas-avalanche multipliers
J. F. C. A. Veloso, F. Amaro, J. M. Maia +6
We present recent results on the operation of gas-avalanche detectors comprising a cascade of gas electron multipliers (GEMs) and Micro-Hole and Strip Plates (MHSPs) multiplier ope…
Ion-induced effects in GEM & GEM/MHSP gaseous photomultipliers for the UV and the visible spectral range
A. Breskin, D. Mormann, A. Lyashenko +5
We report on the progress in the study of cascaded GEM and GEM/MHSP gas avalanche photomultipliers operating at atmospheric pressure, with CsI and bialkali photocathodes. They have…