Speaker
Dr
Alexey Lyashenko
(Incom Inc.)
Description
Incom Inc is now producing a “baseline” version of the Large Area Picosecond Photo-Detector (LAPPD) – the largest commercially-available planar-geometry photodetector based on microchannel plates (MCPs). It features a stacked chevron pair of “next generation” large area 20 um pore MCPs produced by applying resistive and emissive Atomic Layer Deposition (ALD) coatings to glass capillary array (GCA) substrates encapsulated in a borosilicate glass hermetic package. The entry window of the detector is coated with a high sensitivity semitransparent bi-alkali photocathode with 350 cm2 detection area. Signals are read out on microstrip anodes applied to the bottom plate. The “baseline” devices have demonstrated electron gains of 107, low dark noise rates (15-30 Hz/cm2), single photoelectron (PE) timing resolution of 52 picoseconds RMS (electronics-limited), and single photoelectron spatial resolution along and across strips of 2.4 mm and 0.76 mm RMS respectively (also electronics-limited), high (up to 28%) QE uniform bi-alkali photocathodes and low sensitivity to magnetic fields up to 0.8 T (no tests at higher field have been performed at this time). A version with a Fused Silica window featuring an extended UV sensitivity photocathode is also being developed.
Apart from the “baseline” LAPPDs, Incom Inc. is developing a GEN II LAPPD product line featuring a ceramic package and capacitively-coupled pixelated readout with resistive anode. Several GEN II LAPPD have been produced. Their performance is now being evaluated.
An effort has been initiated on the development of a smaller format 10 cm X 10 cm High Rate Picosecond Photo-Detector (HRPPD) that, in addition to all of the LAPPD’s attractive features, would have a fully active area with no x-spacers, even lower sensitivity to magnetic fields with new 10um pore MCPs and sub-mm position resolution with a new style of anode.
LAPPDs can be employed in neutrino experiments (e.g. ANNIE, WATCHMAN, DUNE), particle collider experiments (e.g. EIC), neutrinoless double-beta decay experiments (e.g. THEIA), medical and nuclear non-proliferation applications.
We report on the recent progress in the production of the “baseline” LAPPD and discuss new developments.
Primary author
Dr
Alexey Lyashenko
(Incom Inc.)
Co-authors
Andrey Elagin
(University of Chicago)
Dr
Anil Mane
(Argonne National Laboratory)
Dr
Bernhard Adams
(Incom Inc.)
Dr
Camden Ertley
(Incom Inc.)
Mr
Cole Hamel
(Incom Inc.)
Eric Spieglan
(University of Chicago)
Dr
Jeffrey Elam
(Argonne National Laboratory)
Dr
Mark Popecki
(Incom Inc.)
Mr
Melvin Aviles
(Incom Inc.)
Mr
Michael Foley
(Incom Inc.)
Dr
Michael Minot
(Incom Inc.)
Mr
Michael Stochaj
(Incom Inc.)
Dr
Oswald Siegmund
(University of California, Berkley)
Dr
Till Cremer
(Incom Inc.)
henry frisch
(university of chicago)
