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Advanced Detectors, Systems, & Nanoscience

Keck Institute for Space Studies Technology Development — Single-Photon-Counting Detectors. ABOVE: Two packaged EMCCDs (e2v) that have been delta doped and AR coated for the FIREBall experiment. The different colors (dark purple and light blue) result from differences in the AR coating design.

Keck Institute for Space Studies (KISS)

The Keck Institute for Space Studies (KISS) funded a technology development program for next-generation ultraviolet instrument technologies. Under this program, MDL developed single- and multiple-layer antireflection (AR) coatings for integration with silicon-based detectors. Coatings are applied directly to the detector surface by Atomic Layer Deposition (ALD), which offers nanometer-scale control over film thickness and interface quality, allowing for precision growth of multilayer films. JPL will deliver 2-megapixel, delta-doped, AR-coated electron-multiplying CCDs (EMCCDs) for the FIREBall experiment designed to measure emission from HI, OVI, and CIV, all red-shifted to the stratospheric balloon window (195–215 nm). This combination results in a photon-counting detector with quantum efficiency (QE) > 70% at 205 nm, nearly an order of magnitude higher than the previously flown FIREBall-1 detector based on microchannel plate technology.

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