Large Area Picosecond Photodetector (LAPPD) Performance Test Results

We report and review performance test results achieved for recently produced fully functional sealed Large Area Picosecond Photodetectors (LAPPD
^™
) in tests performed at Incom Inc., as well as independent test results reported by our early adopters. LAPPD #41 represents the first example of a new version incorporating a ceramic rather than all glass body, a fused silica window, and design enhancements intended to minimize dark counts including instrument related noise rates. Results for this prototype include electron gains at the recommended operating point of 5.4 x 10
⁶
@975 V/MCP and 300 V between the photocathode and top of the top MCP, low dark count rates of 6.6 Cts/s cm
²
@30 V on the PC and 950V/ MCP. The transit time variation, at the recommended operating point was 56ps. Sensors offering picosecond timing, can bring transformative change to detector technology and applications in future experiments.