(Q) At this bias or some known bias voltage what is the expected substrate capacitance for a entire sensor (there are asic 4 in parallel)?
(Q) When the beam hits the substrate, which way does the current flow (in/out of pixel front-end) or (assuming substrate is negatively biased) that the current being drawn from the pixel front-end is less/more negative when a pulse hits (positive/negative voltage pulse)?
(Q) What is the capacitance vs. bias curve of substrate?