We present recent progress in the development of novel microchannel plates (MCPs) manufactured using standard lead glass and with borosilicate glass microcapillary arrays functionalized using Atomic Layer Deposition (ALD) technology. Standard glass MCPs have achieved high quantum efficiency (~60% @115 nm & 65 nm) using opaque alkali halide photocathodes. Enhanced performance standard glass MCPs have also been demonstrated with no fixed pattern noise due to construction defects. Novel borosilicate glass atomic layer deposited MCPs up to 20 cm format show good overall response uniformity, tight pulse height distributions and very low background levels (0.05 events cm<sup>-2</sup>). Spatial resolutions of the order of 20 μm are demonstrated with 10 μm pore atomic layer deposited MCPs, and their fixed pattern noise has been significantly reduced. Bialkali cathodes in sealed tubes show high (<30%) efficiency at ~200 nm and long wavelength cutoffs at ~360 nm have been engineered.
We report on life testing of conventional microchannel plates (MCPs) and atomic layer deposition (ALD) MCPs. For the Global-scale Observations of the Limb and Disk (GOLD) mission, long-duration, deep charge extraction testing was performed on a Z-stack triplet of 12 μm pore conventional MCPs with a CsI photocathode on the top surface. A relatively low gain (≈1000e-), modest charge extraction (0.07 C/cm<sup>2</sup>) full-field conditioning burn-in was performed followed by a very deep narrow line burn-in to emulate a GOLD spectral line. The gain local to the line burn-in decreased by ≈20% over ≈1 C/cm<sup>2</sup> of extracted charge, and then remained stable (to 95 C/cm<sup>2</sup>). We also present the performance of several sets of 20 μm pore ALD MCPs with MgO secondary electron emission layers through full-field conditioning burn-ins at both full gain and low gain.