  The multi-pad PICOSEC-Micromegas is an improved detector prototype with a
segmented anode, consisting of 19 hexagonal pads. Detailed studies are
performed with data collected in a muon beam over four representative pads. We
demonstrate that such a device, scalable to a larger area, provides excellent
time resolution and detection efficiency. As expected from earlier single-cell
device studies, we measure a time resolution of approximately 25 picoseconds
for charged particles hitting near the anode pad centers, and up to 30
picoseconds at the pad edges. Here, we study in detail the effect of drift gap
thickness non-uniformity on the timing performance and evaluate impact position
based corrections to obtain a uniform timing response over the full detector
coverage.
